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Who won the German Tennis Championships in July 2019?
Nikoloz Basilashvili emerged victorious after a three-set battle with Andrey Rublev to successfully defend his title at the German Tennis Championships.
The reigning champion claimed his 12th straight win in Hamburg 7-5 4-6 6-3.
With the win, he has become the first player to win the event in successive years since Roger Federer in 2004-2005.
Protection of life and personal liberty is given in which article of Indian constitution?
In the process of hydration of OPC, to complete all chemical reaction, the water requirement (expressed as the percentage of cement) is __________.
Maximum bending moment in roof purlins is taken as
Loads on Purlins are as follows:
Gravity Loads = P kN/m (Dead Load + Live Load)
Wind Loads = w kN/m
Moment for which purlins is designed:
Moment along z−z axis ⇒Mz−z=(w+P cosθ)×(L/10)
Moment along y−y axis ⇒My−y=(P cosθ)×(L2/10)
Converting uniform distributed to total load. For e.g. w × L = W
∴ In general, Maximum bending moment in roof purlins is taken as WL/10.
Match List I with List II and select the correct answer using the codes given below the lists:
It is also called as a tree system, it consists of one main supply line, from which originates (generally at right angles) a number of sub main pipes. Each submain is then divided into several branch pipes, called laterals.
This type of distribution system is suitable for older towns which have developed in a haphazard manner, without properly planned road e.g. old city, irregularly grown city, etc. It is economical and simple.
It is also known as interlaced system or reticulation system, the mains, sub-mains, and branches are all connected with each other.
There is no dead end in the system as looping is provided and is most suitable for well-planned cities. There is equal pressure in all pipe and multiple flow path.
If a city or town is having a system of radial roads emerging from different centers, the pipeline can be best laid in a radial method by placing the distribution reservoir at these centers.
The water from distribution reservoir is then supplied radially to distribution pipes and thus also known as zonal distribution.
It is also called a circular system. In this system, a closed ring, either circular or rectangular, of the main pipes, is formed around the area to be served. The distribution area is divided into rectangular or circular blocks, and the main water pipes are laid on the periphery of the blocks.
This system is very suitable for towns and cities having well-planned roads. It is economical and pressure at the ends are reasonably equal.
Prandtl mixing length for turbulent flow through pipes is
Prandtl mixing length is zero at the pipe wall as the flow is laminar i.e. negligible velocity fluctuation at the boundary of the pipe wall.
The volume of water held by a natural stream channel is known as
ii) Useful storage: The volume of water stored in the reservoir between normal and minimum pool level is called useful storage.
iii) Surcharge Storage: The volume of water stored between the maximum pool and normal pool levels is called surcharge storage.
iv) Valley Storage: Before constructing the dam, a variable amount of water stored in the stream channel is called valley storage.
After construction of the dam, storage increases, and there is a net increase in the storage is equal to the storage capacity of a reservoir minus natural valley storage.
Effective storage for flood mitigation = Useful Storage + Surcharge Storage–Valleys Storage
∴ The volume of water held by a natural stream channel is known as Valley Storage.
Which of the following is correct regarding the design and location of the window?
i) The window area should be 15 – 20 percent of the floor area.
ii) For every 30 m3 internal volume, there should be at least 1 m2 of a window opening.
iii) The windows are located at the height of 0.75 to 0.90 meters from the floor level.
iv) For bathrooms, the level of the windows may be about 2 m above the ground level.
The length of the gyratory crusher varies from _________
The different crushers used for the production of aggregates are as follows:
i. Jaw crusher
ii. Gyratory crusher
iii. Cone crusher
iv. Roll crusher
v. Hammer Mill
vi. Road Mill and Ball Mill
The length of gyratory crusher is limited about 20 cm to 200 cm.
Who is the author of the book named "A Suitable Boy"?
Vikram Seth is the author of the book named ‘A Suitable Boy’.
The novel revolves around the story of four families over a period of 18 months.
Which is NOT a cause of water pollution.
If to, tp and tm are the optimistic, pessimistic and most likely time estimates of an activity respectively, then the expected time ‘t’ of the activity will be:
t0 = optimistic time
tM = most likely time
tP = pessimistic time
The probable range is from (tE – 3σ) to (tE + 3σ)
The Pensky-Martens apparatus are used for conducting the test on bitumen for testing –
Two types of test apparatus may be used for conducting flash point tests on bitumen, namely the Pensky-Martens Closed Cup Tester and Open Cup Tester.
If the bituminous binder is further heated to a temperature higher than the flashpoint, the binder material itself catches fire and continues to burn, the lowest temperature causing this condition is called the "fire point.”
Fire Point: It is the lowest temperature at which application of a test flame causes the binder material to ignite and burn at least for five seconds under specified test conditions.
Note: The fire point is always higher than the flashpoint of a material.
Pensky-Martens Open Cup Tester is used to determine the fire point of the bituminous binders.
Appropriate letter size for writing any Notes on a building drawing is _______
1. For the main title: 6 mm × 6 mm to 12 mm × 12 mm
2. For subtitle and headings: 4 mm × 4 mm to 5 mm × 5 mm
3. Notes, dimensions, Construction Notes, etc: 2 mm × 2 mm to 4 mm × 4 mm
Consider the following statements:-
Admixtures are added to concrete to–
1. Increase its strength
2. Reduce heat of hydration
3. Delay the setting of cement
4. Reduce the water – cement ratio
Which of the above statements is /are correct?
1. reduce the water – cement ratio thus to improve the workability of concrete.
2. To delay the setting time of cement.
Note: Admixtures has no direct affect on the strength of concrete
Assertion (A): The weight of a quantity indicates the relative precision of a quantity within a set of observation.
Reason (R): The weights are generally taken as directly proportional to the variance of the standard errors.
Worksheets are part of
Microsoft Excel is the electronic spreadsheet program within the Microsoft Office suite.
An electronic spreadsheet is an application used to perform numeric calculations and to analyze and present numeric data.
In Excel, the electronic spreadsheet is called a worksheet, and it is contained in a file called a workbook, which has the file extension .xlsx
Cells are the basic unit for storing data.
In any spreadsheet program such as Excel, each rectangular box is referred to as a cell
A cell is the intersection point of a column and a row
Data entered into an Excel spreadsheet is entered into a cell
Each cell can hold only one piece of data at a time
On which day was the 20th Anniversary of Kargil Vijay Diwas celebrated?
The 20th Anniversary of Kargil Vijay Diwas was celebrated on 26 July 2019.
The day is named after the successful Operation Vijay in 1999, when India regained control of the high outposts which Pakistan had stealthily taken over.
The celebrations of 20th Anniversary of Kargil Vijay Diwas began in Delhi on 14 July 2019.
Where is the Headquarter of UNCTAD (United Nations Conference on trade and development)?
UNCTAD is the principal organ of the UN General Assembly dealing with trade, investment, and development issues.
The organization's goals are to "maximize the trade, investment and development opportunities of developing countries and assist them in their efforts to integrate into the world economy on an equitable basis”.
The headquarters of the United Nations Conference on Trade and Development is located in the Palace of Nations (United Nations Office at Geneva, Switzerland).
A solution contains 40 g of common salt in 320 g of water. The concentration in terms of mass by mass percentage of the solution.
Mass of solvent (water) = 320 g
Mass of solution = Mass of solute + Mass of solvent
= 40 g + 320 g
= 360 g
mass percentage of solution mass percentage of solution = (40/360) x 100 = 11.11%
In the case of angle section lug angles, their attachment to the member should be capable of resisting x% in excess of the force in an outstanding leg of the angle where x is
i. 40% excess force than carried by the outstanding leg of main angle section.
ii. 20% excess force than carried by the outstanding leg of the main channel section.
The camber of the road should be approximately equal to:
So, the camber of the road should be approximately equal to half of the longitudinal gradient.
A man is standing on a boat in still water. If he walks towards the shore, the boat will
Minimum clear cover (in mm) to the main steel bars in a slab, beam, column, and footing respectively are
1. Slab = 15 mm
2. Beam = 25 mm
3. Column = 40 mm
4. Footings = 75 mm.
The soil pollutants that affect the food chain and food web by killing microorganisms and plants are
Agricultural waste is waste produced as a result of various agricultural operations. It includes manure and other wastes from farms, poultry houses and slaughterhouses; harvest waste; fertilizer run off from fields; pesticides that enter into the water, air or soils; and salt and silt drained from fields.
A pathogen or infectious agent is a biological agent that causes disease or illness to its host.
Which of the scaffolding can be used only for maintenance work such as painting, pointing, etc.
Needle scaffolding or Cantilever scaffolding
Mason’s scaffolding or Double scaffolding
Bricklayer’s scaffolding or Single scaffolding
Trestle and suspended scaffolding are majorly used for minor works such as painting, pointing, whitewashing, distempering, etc.
Who was sworn in as the 29th Governor of Bihar in July 2019?
phagu Chauhan, a six-time member of the Uttar Pradesh Assembly, was sworn in as the 29th Governor of Bihar on 29 July 2019.
He was administered the oath of office by Chief Justice of Patna High Court Amreshwar Pratap Shahi at the Raj Bhavan in Patna.
Chief Minister Nitish Kumar, Deputy Chief Minister Sushil Kumar Modi and several other leaders were present during the ceremony.
As per IS:456 the value of strain at outermost tension fiber is _____
(i) Plane sections normal to the axis remain plane after bending.
(ii) The maximum strain in concrete at the outermost compression fibre is taken as 0.0035 in bending.
(iii) The acceptable stress-strain curve of concrete is assumed to be parabolic, as shown in the figure below:
(iv) The tensile strength of concrete is ignored.
(v) The design stresses of the reinforcement are derived from the representative stress-strain curves as shown in the figure below:
Partial safety factors for steel and concrete should be considered as 1.15 and 1.5, respectively.
(vi) The maximum strain in the tension reinforcement in the section at failure shall not be less than (fy/1.15Es )+0.002,
where fy is the characteristic strength of steel and Es = modulus of elasticity of steel.
A prismatic member with an area of cross-section ‘A’ is subjected to a tensile load ‘P,’ then the maximum shear stress and its inclination with the direction of load, respectively are-
In the case of uniaxial stress, maximum principal stress σ1 and minimum principal stress σ2 will be PA and zero, respectively.
Maximum shear stress (\tau)
Plane of maximum shear stress,
∴ The maximum shear stress and its inclination with the direction of load, respectively, are P/2A and 45°.
Reciprocal levelling eliminates:-
It eliminates the following errors:
i) error in instrument adjustments
ii) combined effect of Earth's curvature and the refraction of the atmosphere
iii) variation in the average refractions
Reciprocal levelling eliminates the error due to collimation and error due to curvature of Earth entirely, but as the refraction depends upon the atmosphere, which may change every minute.
∴ Error due to refraction cannot be eliminated completely, but it is reduced.
Bending speed for 180° bend for electrical cutting and bending combined machines is ____ seconds.
Electrical automatic rebar benders can bend bars up to 32 mm.
Spiral hoop radial benders can bend bars to a minimum of 10 mm and to a maximum bar diameter unlimited.
If the number of member (m) in a frame having joints (j) is more than that required by the equation m = 2j – 3, then such frames are called
If m = 2 × j – 3 ⇒ Stable Frame/Perfect Frame/Ideal Frame
If m < 2 × j – 3 ⇒ Unstable Frame/Imperfect Frame
If m > 2 × j – 3 ⇒ Over stiff frame/Redundant Frame
Which electronic components were used in Third Generation Computers?
The potential difference between the terminals of an electric heater is 80 V when it draws a current of 5 A from the source. What current will the heater draw if the potential difference is increased to 120 V?
According to Ohm’s law,
R = V/I
R = 80/5 = 16 Ω
When the potential difference is increased to 120 V the current is given by current = V/R
120/16 = 7.5 A
The current through the heater becomes 7.5 A
Assertion (A): According to IS: 456; over reinforced sections are not permitted
Reason (R): There is a ductile failure of an over reinforced section
Select your answer based on the coding system given below-
When the stress in concrete reaches its permissible value before steel, then the section is failed with the sudden collapse of the structure. The resulting beam is known as an over-reinforced beam.
In over reinforced section the steels are not yielded fully, so over reinforced section is considered uneconomical.
Failure is also sudden in over reinforced section because concrete is brittle in nature, and in over reinforced section concrete fails prior to steel.
The design of over reinforced section is also complicated.
∴ Over reinforced section is not recommended by IS 456:200 due to sudden/brittle failure.
∴ Assertion is true, but reason is wrong.
The limiting depth of the Earth dikes is about ______
They are generally employed for short duration, particularly to enable the construction of more durable cofferdam behind them.
Earth dikes are recommended only for a shallow water depth of about 1200 mm to 1500 mm.
Most common types of cofferdams are as follows:
Single wall cofferdams
Double wall cofferdams
Rock-filled crib cofferdams
Standard rail length for a Broad-Gauge track as per Indian Railway is ____
i) It should be manufactured at a reasonable cost.
ii) It can be carried in the largest wagon available.
iii) It should be limited by the facilities available for lifting or handling the rail, etc.
Indian Railway has adopted 12.80 meters and 11.89 meters as standard rail length for B.G and M.G track.
The interaction equation for checking the bolts for combined shear and tension is
Vsb = applied factored shear at design load
Vdsb = design shear strength
Tb = externally applied factored tension at design load
Tdb = design tensile strength
Separation of water or water sand cement from a freshly mixed concrete, is known:
Creeping: Elastic and long term deformation of concrete under a continuous load.
Segregation: Segregation of concrete is separation of ingredients of concrete from each other.
A computer system consists of
A computer system consists of hardware and software components.
Hardware is the physical equipment such as the keyboard, monitors, cables, storage drivers, speakers etc
Software is the operating system and programs. The operating system instructs the computer how to operate
Which of the following lakes is called only floating lake in the world?
Loktak lake located near Mooring district of Manipur is called the only floating lake in the world due to Phumdis
Phumdis are the heterogeneous mass of vegetation, soil, and organic matters at various stages of decomposition that has been thickened into a solid form
Phumdis are also known as floating biomass islands
Increase in atmospheric temperature due to carbon dioxide, is called:
It occurs due to the increase in the percentage of carbon dioxide in the atmosphere
It absorbs the solar rays and energy of the sun due to which the temperature on the earth increases and natures balance gets disturbed
Our vehicles and industries are continuously increasing the amount of carbon dioxide in the atmosphere
Increase in the average temperature of the earth surface due to the greenhouse effect is called global warming
It also refers to the increase in the average temperature of the air and sea at earth's surface
Green House Gases (GHG):
The major greenhouse gases are
Water vapour - causes about 36% - 70% of the greenhouse effect
Carbon dioxide (CO2) which causes 9 - 26%
Methane (CH4) causes 4 - 9%
In balancing of the following chemical reaction, the number of moles of water (“b”) required are:
a CO2 + b H2O → c C6H12O6 + d O2
On LHS Carbon = 1
On RHS Carbon = 6
Multiply by 6 on LHS
6 CO2 + b H2O → c C6H12O6 + d O2
On LHS Hydrogen = 2
On RHS Hydrogen = 12
Multiply by 6 on LHS
6 CO2 + 6 H2O → c C6H12O6 + d O2
On LHS Oxygen = 18
On RHS Oxygen = 6 + 2 = 8
Multiply oxygen on RHS by 6
The overall balanced equation is:
6 CO2 + 6 H2O → C6H12O6 + 6 O2
Acid rain is caused by presence of which of the following gases in the atmosphere
In the plate loading test for determining the bearing capacity of soils, the size of the square bearing plate should be
Square or circular in shape
Thickness > = 25 mm
Size may vary from 300 to 750 mm
For clayey and silty soils and for loose to medium dense sandy soils with N < 15, 450 mm square plate is used
For dense sandy or gravelly soils(15 < N < 30) three plates of sizes 300 mm to 750 mm is used depending on reaction loading and maximum grain size
Side of plate = 4× size of particles
Which is true of ecosystem?
biotic diversity and
material cycling to form a stable, self-supporting system.
The organisms in an ecosystem are classified into 3 main categories
The consumers utilize materials and energy stored by the producers.
Decomposers obtain their food molecules from the organic materials of dead producers and consumers.
In a true ecosystem, producers are more than consumers (herbivores and carnivores).
The major portion of the alkalinity in natural water is caused by
Alkalinity refers to the capability of water to neutralize the acid
The alkalinity of natural water is determined by the soil and bedrock through which it passes
The main sources for natural alkalinity are rocks which contain carbonate, bicarbonate, and hydroxide compounds. Borates, silicates, and phosphates also may contribute to alkalinity
Where does the EI-Nino current occur?
‘El Nino’ refers to the ‘little boy’ and it develops in the central and East-central equatorial Pacific, including off the Pacific Coast of South America.
It is so named because the pool of warm water in the Pacific near South America is often at its warmest during the Christmas.
This refers to times when waters of the tropical eastern Pacific are colder than normal and trade winds blow more strongly than usual.
The reaction in which ester is treated with an alkali to obtain carboxylic acid and alcohol is called:
Esters are sweet-smelling substances.
These are used in making perfumes and as flavouring agents.
Esters react in the presence of an acid or a base to give the alcohol and salt.
This reaction is known as saponification because it is used in the preparation of soap
CH3OOOC2H5 + NaOH → C2H5OH + CH3COONa
A suspension bridge with a two-hinged stiffening girder is
A suspension bridge with a three-hinge stiffening girder is statically determinate.
When KMnO4 is added in water for the purpose of disinfection, which colour appear in the water
When KMnO4 is added in water, pink colour appears in the water.
If the colour disappear indicates the presence of microorganism and organic matter in it.
KMnO4 is added further up to an extent pink colour remains stable in water.
The stand of pink colour in water indicates the removal of microorganism and organic matter from the water.
It is advisable not to use water for 48 hours after the treatment with KMnO4.
Which among the following is/are output devices?
An output device is any hardware that sends data from a computer to another device mostly in form of audio or video.
Scanner scans any document and sends it to computer, so it is a input device.
Speaker gets data from computer in form of audio. So it is a output device.
Plotter is printer that print vector image. It recieve data from computer and print it on paper. So it is also a output device.
A hydraulic jump occurs at spillway. The depth before jump is 0.2 m. The sequent depth is 3.2 m.
What is the energy dissipated in m (approximate)?
The Laboratory apparatus are made of ________.
The Laboratory apparatus are made of pyrex glass. Pyrex glasses are borosilicate glasses.
Some of the basic laboratory apparatus comprise of a volumetric flask, graduated cylinder, funnel, and beaker.
Flint glasses are durable and heavy characterized by their high refractive quality, clarity, and brilliance.
Crookes glasses are those which are designed to diminish the transmission of UV rays.
Maximum abrasion value for a base course in WBM with bituminous surfacing is
Fly ash is the environmental pollutant generated by
Which of the following decisive battles had established the dominion of the British in India?
The combined armies of Mughals, Awadh and MirQasim were defeated by the British army.
Treaty of Allahabad was signed after the battle of Buxar.
An area of 64 square kilometre is represented by 256 square centimetres on a map. The R. F. of the scale is
Factor for measuring area is given by
Which is the strongest concrete mix?
1 : 5 : 10 – 1 bag of cement for 15 bags of aggregate – weakest
1 : 4 : 8 – 1 bag of cement for 12 bags of aggregate
1 : 3 : 6 – 1 bag of cement for 9 bags of aggregate
1 : 2 : 4 – 1 bag of cement for 6 bags of aggregate – strongest
The horizontal angle that a line makes with the magnetic meridian is called:
Magnetic meridian: When the magnetic needle is suspended freely and balanced properly, unaffected by magnetic substances, it indicates a direction. This direction is known as magnetic meridian. The angle between the magnetic meridian and a line is known as magnetic bearing or simple bearing of the line.
Calculate the weight (kg) per meter length of 20 mm diameter steel bar place at a spacing of 200 mm center by center for 1 meter.
Unit weight of bars =7850kg/m3
Weight of bars
Weight of bars
No deductions is made in the masonry for the openings if the area of the opening does not exceed.
(1) Opening each up to 1000sq cm 0.1 square meter
(2) Ends of beams, post, rafters, etc. up to 500 sq.cm or 0.05 sq.m in section.
(3) Bed plate, wall plate, bearing of balcony (chajja) and the like up to 10 cm depth. Bearing of floor and roof slabs are not deducted from masonry.
The average pan coefficient of the standard USWB class A pan evaporimeter used for evaporation is
Lake evaporation = Pan Coefficient (Cp) × Pan Evaporation
If fck and fy are characteristic strength of concrete and yield stress of steel respectively and Es is modulus of elasticity of steel, the ultimate flexural strain in concrete can be taken as
At certain depth, the fibers would have reached the strain of 0.002 and the stress of 0.446fck.
On further increasing the load, the strain will ultimately reach to the value of 0.0035.
Beyond this strain, the concrete is believed to fail. So, once the extreme fibers fail, the cracks will develop, which leads to the weakening of the section and leading to failure of the structure.
Presence of fluoride in water greater than the permissible level of 1.5 mg/L causes
Methemoglobinemia (Blue baby disease) is caused by excess of nitrates in water. Nitrate is not harmful as it is fully oxidized. The permissible limit of nitrate is 45 mg/lit. High quantities of copper are likely to affect human lungs and other respiratory organs.
If the depth of flow in a channel is 1 m and velocity of the flow is 2 m/sec, then the velocity at which elementary wave can travel upstream is:
Which layer of the atmosphere has the maximum concentration of Ozone gas?
Stratosphere layer of atmosphere has the maximum concentration of Ozone gas.
Approximately 10 per cent of Ozone layer is present in Troposphere and rest of the 90 per cent found in the a Stratosphere layer of the atmosphere.
The ozone layer in the Stratosphere atmosphere absorbs most of the ultraviolet radiation from the Sun.
The stratosphere is the second layer of atmosphere whereas Troposphere is the lowest layer of the atmosphere.
The Thermosphere is the layer of the Earth's atmosphere is above the Mesosphere.
There are five layers of atmosphere namely- Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere.
Polar moment of inertia of a hollow shaft having D and d as outer and inner diameters, is given by:
Polar moment of inertia of Hollow Cylinder:
IZ = J = π(D4−d4)/32
The desirable length of overtaking zone as per IRC recommendation is equal to
The desirable length of overtaking zones is 5 times OSD and the minimum is three times OSD.
Who among the following authored the book 'The Golden Threshold'?
Sarojani Naidu became the first Indian women president of the Congress at the Kanpur session in 1925.
She was the first woman to become the governor of Uttar Pradesh.
She began writing at the age of 13. Known as the Nightingale of India, she eulogised India in her poems published in three collections, The Golden Threshold (1905), The Bird of Time (1912) and the Broken Wing (1917).
The minimum grade of plain concrete in sea-water or exposed directly along the sea coast shall be at least:
Concrete in sea-water or exposed directly along the sea-coast shall be at least M 20 Grade in the case of plain concrete and M 30 in case of reinforced concrete. The use of slag or pozzolana cement is advantageous under such conditions.
Which of the following instruments is not connected with stream flow measurement?
i) Current meter.
ii) Dilution techniques.
iii) Indirect methods.
The new modern techniques for streamflow measurement are:
i) Electromagnetic flow meter
ii) Sounding weight
iii) Echo-depth recorder
The hygrometer is an instrument used to measure the amount of humidity and water vapour in the atmosphere, soil, and confined spaces.
Which of the following is used in the form of an electrolyte of the dry cell (battery)?
Ammonium chloride and zinc chloride is used in the form of an electrolyte of the dry cell (battery).
Ammonium chloride is mixed with Plaster of Paris to form a paste, with a small amount of zinc chloride added to increase the battery’s shelf life.
Ammonium chloride paste allows current to flow.
Zinc chloride paste allows a dry cell to conduct electricity and provide electrical power to various substances.
Zinc chloride paste is used between the space of anode and cathode electrodes in a dry cell along with moist paste of ammonium chloride, where zinc chloride acts as an electrolyte.
How many days a timber may require for natural seasoning?
So it becomes necessary to remove water from it for engineering use.
The process of drying timber efficiently is known as the seasoning of timber.
Natural Seasoning of Timber:
Natural seasoning is the process in which timber is seasoned by subjecting it to the natural elements such as air or water.
Natural seasoning takes nearly 4 - 6 months for felled trees.
Slump test is performed to measure
Slump test is the most commonly used method of measuring the consistency of concrete which can be employed either in the laboratory or at the site of work.
It is not a suitable method for very wet or very dry concrete.
The ratio of D60 and D10 sieve sizes in the sieve analysis of granular material is called
It is defined as the ratio of D60 and D10 sieve sizes in the sieve analysis of granular material.
Higher is the value of Cu,the larger is the range of the particle size.
Cu = D60/D10
For uniformly graded soil, Cu = 1
For well graded sand, Cu > 6
For well graded gravel Cu > 4
Coefficient of Curvature / Curvature Coefficient:
Cc = For well graded soil, 1 < cc="" />< />
For gap graded soil, 1 < />c or Cc > 3
D60 = size at 60% finer by weight
D30 = size at 30% finer by weight
D10 = size at 10% finer by weight = Effective size
The design shearing and bearing strength of an ordinary black bolt are 60 kN and 90 kN respectively. If the factored load is 360 kN, number of bolts required will be
Hence, number of bolts required = 360/60 = 6
The work ability of Ready-Mix Concrete shall be within the limits on the specified value for slump test as
The work ability shall be within the following limits on the specified value as appropriate:
+ 25 mm or + 1/3 of the specified value, whichever is less.
± 0.03, where the specified value is 0.90 or greater,
± 0.04, where the specified value is less than 0.90 but more than 0.80, and
± 0.05, where the specified value is 0.80 or less.
What is the total degree of indeterminacy both internal and external of the plane frame shown below?
DS = Dse + Dsi
Dse = External static indeterminacy
Dsi = Internal static indeterminacy
Dse = Re – R
Re = Total number of independent support reaction
R = Total number of available equations of static equilibrium
Dsi = 3 × C - Rr
C = number of closed loops
Rr = total number of internal reactions released.
Ds = 3 × C – R’
C = number of cuts required to make it cantilever beam.
R’ = number of reactions applied to make all joints rigid and number of restrained required to make the hinged joint rigid (m - 1)
m = number of members meeting at the hinge
C = 7
R’ = 2 × (m - 1)
R’ = 2 × (4 - 1)
R’ = 6
∴ Ds = 3 × 7 – 6
Ds = 15
Dse = 3 × 4 – 3
Dse = 9
Dsi = 3 × 4 – (2 × 3)
Dsi = 12 – 6 = 6
Ds = Dse + Dsi
= 9 + 6
Which mirror is used by doctors to examine the eyes, ears, nose, and throat?
When the object is between the centre of curvature and focus or between focus and pole of a concave mirror, the image formed is virtual, erect and magnified.
Therefore, doctors use concave mirrors to examine the eyes, ears, nose,and throat from a close range as the image formed is enlarged and provides a better view to the doctor.
The art of dressing of edges of timber pieces so as to make them straight and square with the face is called ______
Shooting: The art of dressing of edges of timber pieces so as to make them straight and square with the face.
Rebating: The process of preparing a rectangular portion on the edge of a timber piece so as to receive another timber piece which is also similarly cut.
Sawing: The art of cutting of wood by means of the saws is known as the sawing.
Studding: The fixing of small timber battens to the timber walls to which laths and boards are to be nailed.
Head loss in a flowing fluid is experienced due to _____.
A. Friction at surface
B. Change of direction
C. Change of section of the passage
D. Obstruction in passage
Testing of chlorine residue in water is done through
Starch Iodide test
Which electronic components were used in Fifth Generation Computers?
The method in which disposal of refuse is carried out by burning it at high temperature in the presence of oxygen
Composting is the method of disposal of refuse, in which decomposition can be carried out either in presence or absence of oxygen.
Pyrolysis is a method in which the disposal of refuse is carried out by burning it at a high temperature either in the absence of oxygen.
Pulverization refers to the action of crushing and grinding heavier solids into lighter solids.
Shredding refers to the action of cutting and tearing heavier solids into lighter solids.
Excess of ________ is responsible for brick’s decay.
A good brick earth should contain a small quantity of magnesia (about 1%)
Magnesium in brick earth imparts a yellow tint to the brick.
It is responsible for reducing shrinkage
Excess of magnesia leads to the decay of bricks.
If the net amount of irrigation is 8 cm and field efficiency is 75%, the gross amount of water to be applied to the field will be
The gross amount of water to be applied to the field will be
G|R = 8cm/0.75= 10.67 cm
The rotational effect of an applied force can be measured by ________.
Moment of Force is defined as the rotational effect of a force on a body about an axis of rotation and its unit is Newton metre.
Centripetal Force acts towards the centre of the circular path in which a body is moving.
Impulse is the product of force and time since it is the reaction when a large force acts on a body for a very small time.
Lateral ties in RCC columns are provided to resist
1. to resist buckling and strengthen bond.
2. to bind longitudinal reinforcement and proper distribution of concrete.
Providing lateral ties at the proper spacing confines concrete (like gripping the concrete enclosed between the lateral ties), thereby preventing pieces of failed concrete from falling away.
The transverse reinforcing bars are provided to ensure that every longitudinal bar nearest to the compression face has effective lateral support against buckling.
_______ is a combination of an electronic theodolite and an electronic distance meter.
The combination makes it possible to determine the coordinates of a reflector by aligning the instruments cross-hairs on the reflector.
Simultaneously it can measure the vertical and horizontal angle and slope distance.
A microprocessor in the instrument takes care of the recordings, readings, and other computations.
The intensity of light is ________ due to constructive interference.
The non-uniform distribution of energy due to the superposition of light waves in a media is called the interference of light.
Constructive interference occurs when the crest of one wave falls on the crest of another wave, or the trough of one wave falls on the trough of the other wave.
The resultant intensity due to constructive interference is, therefore, maximum.
Why is the Caps Lock key referred to as a toggle key?
The most commonly used toggle key is the caps lock key, which alternates the letter keys between uppercase and lowercase
Num lock is another toggle key that helps to input numerals from the numeric keyboard and is turned on by default..
Scroll lock key allows arrow keys to scroll through window's contents and allows users to scroll without depending on the scroll bar
The insert key is another example of a toggle key, and it toggles between overtype mode and inserts. mode while entering text.
The average crushing and tensile strength of hand molded bricks in kN/m2 is:
If unit load moves from left to right on a Simply supported beam, the nature of ILD for the reaction is:
Let the unit load moves from the left end A to the right end B of the beam.
Cavitation can take place in case of
Cavitation is likely to occur at the inlet to the pump
Since the pressure, there is the minimum and is lower than the atmospheric pressure the formation of bubbles or cavities in liquid, developed in areas of relatively low pressure around an impeller
The imploding or collapsing of these bubbles trigger intense shockwaves inside the pump, causing significant damage to the impeller and/or the pump housing
The Gross Domestic Product of a country is defined as which among the following?
The Gross Domestic Product is defined as the total value of the finished goods and services produced within the boundary of a country in a financial year.
The GDP of India has shown a growth of 8.2% in the first quarter of the FY 2018-19.
Duralumin alloy consists of Al, Mn, ________.
Duralumin alloy consists of Mg, Mn, Al, and Cu.
Duralumin is a lightweight, strong, and hard alloy of aluminium, used widely in aircraft construction.
It is workable, ductile, and relatable in the normal state and can be drawn and rolled into a variety of shapes.
Which of the following is the main constituent of Biogas after Methane?
Methane and Carbon dioxide are the main constituent of Biogas.
Methane is produced by the anaerobic bacterial decomposition of vegetable matter under water.
It is also known as marsh gas or swamp gas.
Its chemical formula is CH4.
The first page of a web site is called its:
If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated
While measuring horizontal angles by the method of repetition with a theodolite, readings are taken on both the verniers. Which one of the following errors will be eliminated by reading both the verniers ?
The following bearings were observed while traversing with a compass:
Which stations were affected by local attraction?
Reciprocal leveling is employed to determine the accurate difference in the level of two points which
Consider the following statements In the bar chart planning
1. Interdependence of the operations cannot be portrayed
2. Progress of work can be measured
3. Spare time of the activities can be determined
4. Schedule cannot be updated.
Which of these statements is/are correct ?
Which are the critical activities of the bar chart shown below?
The problem of developing low cost housing for economically backward people in the undeveloped region should be analyzed by
The probability distribution taken to represent the completion time in PERT analysis is
Interfering float is the difference between
Match List-I (Description of activity floats) with List-II (Names of the floats) and select the correct answer using the codes given below the lists:
A. Earliest start time of its successor activity minus earliest finish time of the activity in question minus the duration
B. Time available or an activity performance minus the duration of the activity
C. Excess of minimum available time over the required activity duration
D. Difference between total float and free float of an activity
The approximate proportion of dry cement mortar required for brickwork is
Therefore mortar needed = 1 - 500 x 0.19 x 0.09 x 0.9 x = 0.23m3.
Add 15% extra for frog filling, brick bonding, and wastage.
Volume of wet mortar = 0.23 x 1.15 = 0.265m3
1m3 of wet mortar = 1.25m3 of dry mortar
= 0.265m3 wet mortar = 0.33m3 of dry mortar
Dry mortar as a percentage of brick work = 0.33/1 x 100 = 33%.
High alumina cement is produced by fusing together a mixture of
A gauged mortar is obtained by adding which of the following ingredient (s) to cement?
Consider the following statements:
1. Tests on cement paste to determine initial and final setting times are done at normal consistency conditions.
2. Low heat cement has a high percentage of tricalcium aluminate.
3. High early strength Portland cement contains a larger percentage of tricalcium silicate and a lower percentage of dicalcium silicate.
Which of these statements are correct?
Consider the following stages in the manufacturing of bricks :
The correct sequence of these stages in the manufacturing of the bricks is
The percentage of alumina in good brick earth lies between
The nominal size of the modular brick is
Percentage of silica in a good brick earth lies between
Consider the following statements:
Bricks are soaked in water before use in masonry work
1. to remove dust
2. to remove air voids.
3. so that they do not absorb water from cement mortar.
Which of these statements is/are correct
Which one of the following procedures is applied to determine the soundness of bricks?
Match List-I (Test) with List-II (procedure) and select the correct answer using the codes given below the lists:
1. A brick is to be broken for the test
2. Two bricks are taken, and they can be struck with each other without breaking
3. A scratch is easily made on a brick surface with the help of a finger nail
4. Difference in weight between the brick immersed in water for 16 hours and its dry weight
When the corner of a brick is removed along the line joining midpoints of adjoining sides, the portion left is called
Match List-I (Terms) with List-II (Brief definition) and select the correct answer using the codes given below the lists:
1. Separation between adjacent layers of tissues
2. Disintegration caused by fungi
3. A branch base embedded in the timber
4. Outer layers of a log of wood
Consider the following statements: kiln seasoning of timber results in
1. reduced density
2. reduced life.
3. dimensional stability
Which of these statements is/are correct?
Coefficient of friction is less when the pavement surface is
Compared to a level surface, on a descending gradient, the stopping sight distance is
If the stopping distance is 60 metres, then the minimum stopping sight distance for lane, two way traffic is
If N is t he algebraic difference of grades, S is the headlight sight distance in metres, then the transmission length of a valley curve (following standard codes) should roughly be equal to
L = NS2/8H
Where the height of headlight = 0.75
L = NS2/6
Consider the following factors
1. Type of Terrain
2. Cost of construction
3. Rainfall in the area
4. Speed of vehicles
While considering for ruling gradient fixation, the factors considered more important than the rest are
The absolute minimum radius for a horizontal curve designed for speed of 100 kmph given the permissible values of superelevation 0.08 and coefficient of friction 0.12 will be
When the speed of traffic flow becomes zero, then
The lost time due to starting delay on a traffic signal is noted to be 3s, the actual green time is 25s, and the yellow time is 3s. How much is the effective green time?
= 25 + 3 – 3 = 25 seconds
In speed and delay study, if the average journey time on a stretch of road length of 3.5 km is 7.55 minutes and the average stopped delay is 1.8 minutes, the average running speed will be, nearly
The traffic conflicts that may occur in a rotary intersection are
The cumulative speed distribution curve is usually adopted for the geometric design of highways. The percentile speed adopted for geometric design is
Which of the following traffic studies is required for deciding the speed limit for traffic regulation and control
In reinforced cement concrete pavements, steel is placed
In cement concrete pavements, tie bars are provided:
The sub-grade soil properties of a sample are as follows:
Soil portion passing 0.075 mm sieve = 50%
Liquid limit = 40%
Plasticity index = 20%
The group index of the soil is
GI = 0.2a + 0.005ac + 0.01 bd soil portion passing 0.075mm sieve
P = 50%
LL = 40% PI = 20%
A = P - 35 = 15 < 40
B = P - 15 = 35 < 40
c = LL - 40 = 0
D = PI - 10 = 10
G.I = 0.2 x 15 + 0 + 0.01 x 35 x 10 = 3 + 3.5 = 6.5
The position of base course in a flexible pavement is
Consider the following pairs
Which of these pairs are correctly matched?
Influence factor ‘I’ depends on
Boussinesq’s influence factor for vertical pressure at depth Z and at the centre of a circular area of diameter A carrying uniformly distributed load is
The five-day BOD of a waste water sample is 150 mg/l at 20°C. The reaction constant ‘k’ (to the base ‘e’) is 0.2 per day. The ultimate first stage BOD is (‘e’ = 2.72)
What is the zone where fish life might t end to progressively dwindle when wastewater is discharged into a river?
Atmospheric layer important for human beings is:
Our atmosphere is divided into five layers starting from the earth’s surface;
Troposphere: Average height is 13 km. The air we breathe exists here. This layer contains dust particles and water vapour. All changes in climate and weather take place in this layer. Almost all the weather phenomena like cloud, rainfall, fog and hailstorm occur in this layer. This is the most important layer for all biological activity.
Stratosphere: up to an altitude of 50 km from the earth’s surface. Almost free from clouds, most ideal for flying aeroplanes, Contains a layer of ozone gas (Ozonosphere). Temperature increases with height in this layer.
Mesosphere: Up to an altitude of 80 km. Meteorites burn up in this layer on entering from the space. Temperature decreases with height in this layer.
Thermosphere: It extends between 80-400 km. In thermosphere temperature rises very rapidly with increasing height. The ionosphere is a part of this layer. It contains electrically charged particles known as ions, and hence, it is known as the ionosphere. Radio waves transmitted from the earth are reflected back to the earth by this layer. This layer helps in radio transmission. The International Space Station and satellites orbit in this layer. Temperature increases with height in this layer.
Exosphere: The uppermost layer of the atmosphere is known as an exosphere. This layer has very thin air. Light gases like helium and hydrogen float into space from here.