RRB JE ME (CBT II) Mock Test- 4
150 Questions MCQ Test RRB JE Mock Test Series for Mechanical Engineering (ME) | RRB JE ME (CBT II) Mock Test- 4
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Who among the following has been given the award for sportswoman of the year in Laureus World Sports Awards 2019?
Which of the following Indian water missions was awarded with “Public Water Agency of the Year” at the Global Water Summit 2019 in London?
Who is the Author of the book, ``The Oxford India Gandhi — Essential Writings”?
Folk dance "Lai Haraoba" is popular in which Indian state?
Which of the following marriages was NOT considered legal in ancient India?
During the reign of which Mughal ruler was the 'Jizya' re-imposed?
Which of the following channels separates Amino dive from Lakshadweep?
Where do we find the ideals of Indian democracy in the Constitution?
What is the maximum number of seats fixed for Lok Sabha in India?
The maximum strength of the House allotted by the Constitution of India is 552. Currently, the house has 545 seats which is made up by the election of up to 543 elected members and at a maximum, 2 nominated members of the Anglo-Indian Community by the President of India.
What is the function of a political pressure group in democracy?
The first mega food park of Rajasthan has come up in which city?
Who is the principal regulatory authority for the stock market in India?
The magnifying power of a telescope is 9. When adjusted for parallel rays, the distance between the objective and the eyepiece is 20cm. The focal length of the lenses are-
In the circuit, the equivalent resistance between A and B is–
The circuit is equivalent to the following. It is a balanced Wheatstone bridge between abcd and then in parallel (2R) resistances. Thus ignoring resistance between the arms. The circuit is equivalent to three (2R's) resistances in parallel (abc, adc, aRRc).
In the production of wave energy, which form of energy is used?
Two electric bulbs, one of 200 volt 40 watts and the other 200 volts 100 watts are connected in the house wiring circuit
The motion of a simple pendulum is an example of-
When a pendulum bob is displaced from equilibrium and then released, it begins it’s back and forth vibration about its fixed equilibrium position.
The motion is regular and repeating, an example of periodic motion.
When parallel beams of light fall on a convex mirror, then :
A.: They undergo reflection satisfying 
B: They get reflected as if they are coming from the focus
Both options are correct. 
should be equal because incident ray and reflected ray make the same angle with the normal of the plane. In the 2nd option, the lines which are parallel to the axis meet at the focus and appear like they are coming from focus.
The hexadecimal equivalent of a binary 111111110010 is ________.
It uses the digits 0 to 7. Octal numerals can be made from binary numerals by grouping consecutive binary digits into groups of three (starting from the right).
Which one of the following is not an application software package?
Which of the following is considered as the fastest printer?
A laserjet printer has a good print speed among laser, inkjet, bubble jet, and dot matrix printers.
Laser printing is an electrostatic digital printing process.
It produces high-quality text and graphics.
Which of the following acts as the central nervous system for other components of the computer system?
This is a NOT-AND gate which is equal to an AND gate followed by a NOT gate.
___________ is the process of restoring a forest that once existed but was removed at some point of time in the past.
Which among the following is not a natural ecosystem?
The natural ecosystem is a community of living and nonliving organisms, where each component interacts together as a unit through biological, physical and chemical processes.
The distinctiveness of natural ecosystems is that they are purely natural and their formations are not in any way influenced by human activity.
Natural ecosystems may be terrestrial (such as a desert, forest, or meadow) or aquatic (a pond, river, or lake).
The process that divides the day from night on the globe is called the circle of ..............
The circle that divides the day from night on the globe is called the circle of illumination.
The circle of illumination is at the right angle to the orbital plane.
The following city, which was declared as 'Tiger Gateway of India', is_________
Which temperature zone is known as the surplus zone?
All the interacting organisms in an area together with the non-living constituents of the environment form an _____.
Radon is a chemical element with the symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless, noble gas.
Acetic acid is the chemical name of vinegar. Vinegar is an aqueous solution of acetic acid. It has a wide variety of industrial and domestic uses, such as its use as a household cleaner. Acetic acid has a distinctive sour taste and pungent smell.
Which of the following is not a transition metal?
In chemistry, the term transition metal has three possible meanings: The IUPAC definition defines a transition metal as "an element whose atom has a partially filled d subshell, or which can give rise to cations with an incomplete d subshell.” Radium is not a transition metal.
Isobars are atoms of different chemical elements that have ______.
In nuclear reactors, cadmium rods are used as which of the following?
What is the number of groups and periods in the modern periodic table?
Which of the following types of medicine is used for treating indigestion?
Antibiotics inhibit the growth of or destroy microorganisms.
Analgesic is a pain-relieving medication.
Antiseptics are antimicrobial medicine applied to living tissue/skin to reduce the possibility of infection, sepsis, or putrefaction.
Not servicing the vehicles results in incomplete combustion of carbonaceous matter in the automobile engine which generates: ______________.
Incomplete combustion occurs when the supply of air or oxygen is poor.
Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide.
Carbon monoxide is a poisonous gas, which is one reason why complete combustion is preferred to incomplete combustion.
A metal sulphate's chemical formula MSO4 . A chloride of the same metal will have the formula.
In which of the following solutions the concentration of H+ ion is the maximum?
In order to compare the performance of different pumps, it is necessary to have some term which will be common to all the centrifugal pumps; the term ordinarily used for this purpose is the specific speed. This is a type characteristic and can be used to predict the behavior of one pump based on tests of similar, but different sized pumps.
The specific speed is a characteristic of pumps which can be used as a basis for comparison of the performance of different pumps.
Air vessel are used in reciprocating pumps in order to
The dimensionless number for centrifugal pump is 
Hence discharge is directly proportional to speed.
The component of torque converter that allows torque multiplication is
Measurement of temperature is based on which law of thermodynamics?
An insulated box containing 0.5 kg of a gas having cv = 0.95kJ/kgK falls from a balloon 4 km above the earth’s surface. the temperature rise of the gas when hits the ground is
McvdT = mgh
dT = 9.81 x 4000/0.98 x 103 = 40 K
A Carnot engine operates between 27℃ and 327℃. If the engine produces 300 kJ of work, what is the entropy change during heat addition?
Will capillary rise occur and if it occurs what will be capillary rise if glass capillary tube is immersed in water and experiment is carried out by astronauts in space.
Capillary rise is given by
h=4*cosθ*σ/ρ*g*d
hence rise is inversely proportional to g
In space g is 0 m/s2
Hence, capillarity rise will occur finitely and will be the whole length of the tube.
If a pure substance is below the triple point temperature, the solid on being heated will only
Upon heating, the phase changes from S to V, so the solid will vaporize or sublime.
When a system reaches the state of equilibrium, the following property assumes its maximum value
A body of mass 2 kg and cp=1.00 kJ/kgK is available at 600 K. If the atmosphere is 300 K and ln 2 = 0.693, the maximum work obtainable from the body till it comes to equilibrium with the atmosphere is
The COP of an ideal refrigerator is N. If the machine is operated as a heat pump between the same temperature limits, its COP will be
Which cycle consists of two reversible isotherms and two reversible isobars?
Air injection in IC engine refers to the njection of
Which of the following factors would increase the probability of knocking in the CI engines?
1. Long ignition delay of fuel.
2. Low self ignition temperature of fuel.
3. Low volatility of fuel.
Select the correct answer using the codes given below:
Codes:
Which of the following sets of the materials is most commonly used in catalytic converters for CI engines?
Platinum : for hydro-carbon (HC)
Palladium : for Carbon-mono-oxide
Rhodium : for oxide of nitrogen (NOx)
In a variable speed SI engine, the maximum torque occurs at the maximum
Brake Power = 2?NT/60
N = speed in rpm
T = torque
The capillary rise at 20℃ in a clean glass tube of 1 mm diameter containing water is approximately
What are the forces that influence the problem of fluid statics ?
The vertical component of force on a curved surface submerged in a static liquid is equal to the
Which one of the following is the condition for stable equilibrium of a floating body ?
The flow in a pipe whose valve is being opened or closed gradually is an example of
Which one of the following is measured by a rotameter ?
In flow through a pipe, the transition from laminar to turbulent flow does not depend on
∴ Re depends on density of fluid, velocity of fluid, viscosity of fluid, and diameter of the pipe
For laminar flow through a pipe, the discharge varies
The boundary layer thickness at a given distance from the leading edge of a flat plat is
Euler number is defined as the ratio of inertia force to
Match List-I (Dimensionless number) with List-II (Definition as the ratio of) and select the correct answer using the codes given below the lists:
Inertia -viscous force ratio → Reynold number
Inertia-Gravity force ratio → Froude number
Inertia- Surface tension ratio → Weber number
Inertia-elastic force ratio → Mach number
A refrigerating machine having a coefficient of performance equal to 2 is used to remove heat at the rate of 1200 kJ/min. What is the power required for this machine?
Waste heat can be effectively used in which one of the following refrigeration systems?
Where is an air refrigeration cycle generally employed?
The sensing bulb of the thermostatic expansion valve is located at the
The pressure at any given point of a non-moving fluid is called the ____________
The room's sensible heat loss is 30,000 kJ/h and the latent heat loss is 20,000 KJ/h. then the sensible heat factor is
SHF = RSHL / RSHL + LHL
= 3000/30000 + 20000
= 3/5
= 0.6
A plane wall is 25 cm thick with an area of 1 m² and has a thermal conductivity of 0.5 W/mK. If a temperature difference of 60°C is imposed across it, what is the heat flow?
In which one of the following materials is the heat energy propagation minimum due to conduction heat transfer?
Fins are used to increase the heat transfer from the surface by
Which one of the following numbers represents the ratio of kinematic viscosity to thermal diffusivity?
Heat transfer by radiation between two grey bodies of emissivity ε is proportional to (notations have their usual meanings)
The shape factor of a hemispherical body placed on a flat surface with respect to itself is
F11 + F, = 1
F11 = 0
F12 = 1
A1F12 = A2F21
?R2 = F212?R2
F21 = 0.5
A cross-flow type air heater has an area of 50 m². The overall transfer coefficient is 100 W/m²K,the and heat capacity of the stream, be it hot or cold, is 1000 W/K. What is the NTU ?
NTU = UA/Cmin = 100 x 50/1000 = 5
Consider the following phenomena:
1. Boiling
2. Free convection in air
3. forced convection
4. conduction in the the air
Their correct sequence in increasing order of heat transfer coefficient is
The air pre-heater of a boiler is located between
Path of Flue Gas
In a centrifugal compressor, an increase in speed at a given pressure ratio causes
The reheat cycle in steam power plant is mainly adopted to
The gas in a cooling chamber of a closed-cycle gas turbine is cooled at
Which method combines established methods such as statistical process control, design of experiments and failure mode and effects analysis (FMEA) in an overall framework.
Which is the dimensionless quantity in fluid dynamics?
What is the tolerance limit for any dimension in the limit system which is also known as the tolerance zone.
In the manufacturing processes of steel,the ,,feedstocksthe the ich metal is converted into steel in the Bessemer process?
Which meter is a velocity type meter which has an impeller which rotates horizontally on a vertical shaft.
The invention of ________ led to the third generation of computers.
Why is KO2 used in oxygen cylinders used in space and submarines?
4KO2 + 2CO2 → 2K2CO3 = 3O2
As in product O2 again is produced so its best to generate oxygen using Carbon Dioxide produced during breathing by using cylinder's gas.
Tooth enamel which is the hardest substance found in the human body, made up of______?
Coefficient of Performance for an ideal refrigeration cycle?
COP = TL/(TH-TL)
making the COP drop below unity when the outside air temperature is too low. Therefore, the system used to heat houses uses fuel.
A single-pressure absorption refrigerator liquid's evaporation rate depends upon?
Which is applied to the metering tube, which results in a potential difference proportional to the flow velocity perpendicular to the flux lines
Which is a systematic method for waste minimization ("Muda") within a manufacturing system without sacrificing productivity
A spherical device with 20 mm outer radius has to be covered with an insulation (k=0.2 W/mK). The atmosphere heat convection coefficient is h= 10 W/ K. Find the thickness of insulation for maximum heat transfer?
critical radius for sphere = 2k/h
=40mm
thickness = 40 - 20 = 20mm
What is the velocity of sound waves in the fluid with K as the bulk modulus and p as the density of the fluid?
Which among the following is the Largest Freshwater Lake in India?
Biligiriranga Temple Wildlife Sanctuary is located in ________?
Which adsorbent was used in the vapor absorption cycle in the twentieth century?
Maximum Strain Energy Theory postulates that failure will occur when the strain energy per unit volume.
using parallel axis theorem and moment of area for triangle
On what voltage two-pole common trip breaker breaks the voltage?
LDV stands for in measure the velocity in transparent or semi-transparent fluid flows, or the linear or vibratory motion of opaque, reflecting, surfaces.
Which file format allows the digital exchange of information among computer-aided design (CAD) systems.
What is the voltage requirement for the electric resistance welding in the welding process of metal.
The actual demand for cycles was 300 in January and 400 in February. The forecast for the month of January was 350 units. The value of smoothing Coefficient is 0.50, the forecast for the month of March is
Forecast of February = 350 - ½(50) = 325
Forecast of March = 325 + ½(75) = 362.5
| Demand | Forecast | Error (D-F) |
January | 300 | 350 | -50 |
February | 400 | 325 | 75 |
March |
| 362.5 |
|
The 52nd amendment to the Constitution of India is most closely related to-
Green plants utilize ……… percent of the sun's energy to prepare their food by the process of photosynthesis?
In backlash, sometimes called lash or play, is a clearance or lost motion in a mechanism caused by gaps between the parts.
What three-terminal power semiconductor device primarily used as an electronic switch which, as it was developed, came to combine high efficiency and fast switching.
Which casting is a type of evaporative-pattern casting process that is similar to investment casting except foam is used for the pattern instead of wax.
The three Time estimates of an activity in a PERT network are
Most likely time = 15 days
Optimistic time = 9 days
Pessimistic time = 27 days
Probability to complete this activity in 16 days?
What is the source of heat in an absorption refrigerator?
Why Flexure formula not apply directly to composite beams, which is the correct assumption?
How can we describe the elasticity for the material which is subject to any stress?
For a pair of involute RACK and Pinion of 14.5 degree pressure angle ,
Find the minimum number of teeth required to avoid interference.
minimum no of teeths in case of rack and pinion
= 
putting Ar =1
and angle as 14.5
we get 31.9
that is minimum 32 teeth
In 1824 the sepoys refused to go to which place to fight for the East India Company by sea route?
Which methods are used in managing inventory and financial matters involving the amount of money a company has to have tied up within the inventory of produced goods, raw materials, parts, components, or feed stocks.
What is the relation for velocity ratio in the third system of Pulleys which is used for commercial purposes? Where n is the number of pulleys.
Where is the pressure angle maximum on the pitch curve?
For an epicyclic gear train the input torque is 100 Nm and RPM of input gear is 1000 clockwise while that of output gear is 100 RPM anticlockwise.
What is the value of holding torque for a gear train?
Which of the following instruments is used to study the dispersion of light?
Indian born Shiva Ayyadurai is associated with the invention of -
Which of the following chemical/s is/are used in the breath test of a person who consumes alcohol during interrogation?
What is the ratio for the mechanical efficiency in any automobile engine while working condition?
A vacuum gage connected to a chamber reads 4.8 psi at a location where the atmospheric pressure is 12.5 psi. Determine the absolute pressure in the chamber.
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