RRB JE CE (CBT II) Mock Test- 5 - Civil Engineering (CE) MCQ

Important Points:

• The prescribed permissible noise level for silence zones is 50 and 40 decibels during daytime and night-time respectively

• The prescribed permissible noise level for the industrial area is 75 and 70 decibels during daytime and night-time respectively

• The prescribed permissible noise level for the residential area is 55 and 45 decibels during daytime and night-time respectively

• The Indian National Congress was formed under the tenure of Lord Dufferin in 1885.

• Lord Mayo was responsible for carrying out the census in the Indian History and was the first Governor-General to be murdered in his office.

• Lord Dalhousie introduced Doctrine of Lapse, Postal services and Railways in India.

• Lord Cornwallis introduced the permanent settlement in Bengal and was also known as the Father of Civil services in India.

• Union Minister of Commerce & Industry and Railways, Piyush Goyal, launched the Global Innovation Index (GII) 2019 in New Delhi on 24 July 2019.

• India jumped five places to improve its position from 57th last year to 52nd in 2019.

• Switzerland remains number one is the GII index followed by Sweden, the United States of America, the Netherlands, and the United Kingdom as top 5.

1. Electric Rebar Cutters

Electrical cutters that can cut diameters up to 16mm are employed.

2. Heavy-Duty Rebar Cutter

These are a higher version of the same, the heavy-duty cutters, that have the capability to cut the bars up to 42mm. At a time, these cutters can cut three to six bars at a time. These cutters make use of oil bath lubrication, that makes the operation noiseless.

3. Wire Rope Cutter

The cutting blade of wire rope cutters is made of steel with a titanium coating. They have a high-speed cutting. These cutters are employed to cut the bars up to a diameter of 20mm. They cut a single bar within 8 seconds, so fast and so clean cut.

4. Rebar Cutting Shear

Rebar cutting shear is a cutter used to cut the stirrups at the equal size in a huge amount. These can also be used for cutting the pipe section, angle or channel sections.

(ii) Base Line: It is the longest main survey line passing through the center of the area.

(iii) Tie Line: A chain line joining two stations. The tie lines are the lines run to locate the details to avoid long offsets.

(iv) Survey Lines: The lines joining the main survey stations are called survey lines.

∴ A line joining two stations is called the tie line.

Transverse Stiffeners/Vertical Stiffeners are provided to increase buckling resistance of the web due to shear; it is provided vertically along the span.

Note:

Horizontal Stiffener / Longitudinal Stiffener is designed to prevent web buckling due to bending compression.

End Bearing Stiffeners are provided at the supports & Load Bearing Stiffeners are provided at the points of concentrated loads.

• Sherardizing (Zinc coating)

• Calorizing (Aluminium coating)

• Chromizing (Chromium coating)

Anodizing: Anodizing is to provide a decorative and corrosion-resistant coating on aluminium and its alloys only.

A thin coating of oxide on aluminium can protect the surface from corrosion.

Aluminium is ideally suited to anodizing, although other non-ferrous metals such as magnesium and titanium also can be anodized.

Parkerising is a process used for making thin phosphate coating on steel.

Galvanizing: It is a process of giving a protective coating of zinc on iron sheets and components to protect the surface from corrosion. It is the process of coating of zinc by hot- dipping.

i) Full face method

ii) Heading and bench Method

iii) Cantilever car dump Method

iv) Drift system

v) Pilot tunnel Method

Various Methods for tunneling through the soft ground are as follows:

i) Forepoling Method

ii) Needle beam Method

iii) Five-piece set Method

iv) Liner plates Method

v) Casing Method

vi) Square set and lagging Method

vii) Horse cups Method

Other Important Samplers:

Split Spoon Sampler: It is commonly used to obtain a disturbed soil sample. It is suitable to use for collecting samples even from saturated sands and other soft and wet soils as a spring-core catcher device attached forms a dome and retain the sample.

Open drive thin-walled Sampler: It is used to obtain an undisturbed sample of clay.

Rotary Sampler: It is used to obtain a bulk sample of larger size such as stiff soils, or stones.

• Delhi is the only union territory of India which has its own High court.

• It was established on 31 October 1966.

• The High Court of Delhi was established with Chief Justice KS Hegde, Justice ID Dua, Justice HR Khanna and Justice SK Kapur as the 4 judges.

• Chandigarh comes under the jurisdiction of Punjab and Haryana High Court.

• Puducherry comes under the jurisdiction of Madras High Court.

• Daman and Diu come under the jurisdiction of Bombay High Court.

So, consistency index is - ve means w>w_L l.e. soil is in a liquid state and behave like a liquid

I_C=0;w=w_L⇒ Soil is in liquid limit.

I_C=1;w=w_P⇒ Soil is in plastic limit.

I_C

gt;1;(w_L−w)

gt;(w_L−w_P)⇒w

lt; wr i.c; soil is stif f.

1. The material of the beam is homogenous and isotropic.

2. The beam is initially straight, and all the longitudinal fibers bend in circular arcs with a common center of curvature.

3. Members have symmetric cross-sections and are subjected to bending in the plane of symmetry.

4. The beam is subjected to pure bending and the effect of shear is neglected.

5. Plane sections through a beam taken normal to the axis of the beam remain plane after the beam is subjected to bending.

6. The radius of curvature is large as compared to the dimensions of the beam.

This is a modification of flush pointing in which the face of pointing is kept inclined, with its upper edge pressed inside the face by 10 mm. This pointing drains water easily.

Recessed Pointing:

This pointing is done by pressing the mortar back from the edge by 5 mm or more. It gives a good appearance.

Beaded Pointing:

This is a special type of pointing formed by steel or ironed with a concave edge. It gives good appearance but is liable to damage.

Tuck Pointing:

This pointing is formed by first pressing the mortar in the racked joint and finishing flush with the face. While the pressed mortar is green, groove or narrow channel, having 5 mm width and 3 mm depth is cut in the center of the groove.

This groove is then filled in or tucked in with white cement putty, kept projecting beyond the face of the joint by 3 mm.

i) Wayside stations: In this type of station, an arrangement is made to cross an up and a down train or for overtaking of the slower trains by the faster trains.

ii) Junctions: In this type of stations, the branch line meets the main line and hence the arrangements are made:

• To facilitate the interchange of traffic between main and branch lines

• To clean and repair the vehicle of the trains which terminates at the junctions

iii) Terminals: The station at which a railway line or one if its branch ends is known as a terminal station or terminal junction.

Catch sidings are provided in case of a hilly area where steep gradients occur near the station. The purpose of catch sidings is to arrest the vehicles which have started running back on the line.

ii) Compaction piles: These piles are used to compact loose granular soil to increase its bearing capacity. Compaction piles do not carry load and hence they can be of weaker material. Sand piles can be used as compaction piles.

iii) ) Fender piles and dolphins: Fender piles and dolphins are used to protect water front structure from impact of any floating object or ships.

iv) Anchor piles: These piles are generally used to provide anchorage against horizontal pull from sheet piling.

∴ Compaction piles do not carry load.

Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analogue waves. A modem converts between these two forms.

• Kudremukh National park is located in Chikkamagaluru district of Karnataka.

• It was declared as a National Park in 1987.

• Other famous National parks in Karnataka are Bandipur, Nagarhole, and Anshi National Park.

• Famous National Parks in Kerala are Periyar, Silent Valley, and Anamudi Shola National Park.

• Famous National Parks in Tamil Nadu are Mudumalai, Mukurthi, and Indira Gandhi National Park.

• Famous National Parks in Odisha are Simlipal, and Bhitarkanika National park.

• The Dead Sea is a salt lake which is bordered by Jordan to the east and Israel to the west.

• The Dead Sea lies in the Jordan Rift Valley, with the Jordan River as its main tributary.

• Its surface and shores are 430.5 meters (1412 feet) below sea level.

The atmospheric refraction occurs in a medium of gradually changing refractive index.

Since the atmosphere bends starlight towards the normal, the apparent position of the star is slightly different from its actual position.

For e.g. 9 DS 21 means a 900 mm wide door with a single shutter of height 2100 mm.

∴ 12 DT 21 stands for 1200 mm × 2100 mm double shutter door.

It is the soil which consists of roughly equal proportion of sand, silt, and clay. It is an ideal medium for the growth of the plants due to good moisture holding and infiltration capacity.

⇒ As sand, silt, and clay are not in equal proportion for the given sample, it is not a loamy soil.

Sandy Soil:

The soil in which a minimum of 35% constituents is sand and silt is less than 15% is said to be sandy soil.

⇒ As sand is only 20% for the above soil sample. It is not a sandy soil.

Silty Loam:

Soil composed of at least 70% of silt and clay and that too silt contributing to the highest fraction and with a minimum of 20% sand particles is termed as silty loam soil.

⇒ For the given sample, since major constituent is clay, given soil is clayey soil.

Most metal oxides are insoluble in water but some of these dissolve in water to form alkalis.

Sodium oxide and potassium oxide dissolve in water to produce alkalis as follows

Na₂O(s) + H₂O(l) → 2NaOH(aq)

K₂O(s) + H₂O(l) → 2KOH(aq)

Non-Metallic Oxides:

Most non-metals produce acidic oxides when dissolve in water

CO₂ + H₂O → H₂CO₃ (Carbonic acid)

SO­₃ + H₂O → H₂SO₄ (Sulphuric acid)

Purpose coffer–dam is:

i) To retain soil and water

ii) Can be used as either temporary or permanent

iii) To provide dry working area for workers

iv) It is constructed to facilitate pile driving operations

v) It is used, when the foundations for piers and abutments of a bridge, dams, locks, etc. are to be constructed.

∴ Coffer–Dam is to be constructed to remove water.

• Municipal solid waste (MSW) is more commonly known as trash or garbage

• It consists of everyday items we use and then throw away, such as product packaging, grass clippings, furniture, clothing, bottles, food scraps, newspapers, appliances, paint, and batteries.

• It is the non-hazardous solid waste

• It comes from our homes, schools, hospitals, and local councils

Important points:

There are different methods of solid waste management. The following are some of the recognized methods:

• Sanitary landfill

• Incineration

• Recovery and Recycling

• Composting

Riser = 13 cm

So number of steps/riser required = 325/13 = 25

So tread required = 25 - 1 = 24 (As the top floor is not counted as tread)

Shallow manhole: It is about 750 mm to 900 mm in depth and it is constructed at the beginning of branch sewer or at places which are not subject to heavy traffic. It is also known as an inspection chamber.

Medium manhole: It is about 900 mm to 2000 mm in depth and it is constructed of 1000 mm × 1000 mm or 800 mm × 1000 mm size.

Deep Manhole: It has a depth of more than 2000 mm.

i) Aldural

ii) Aluminum bronze

iii) Duralumin

iv) Y-alloy

Important Points:

Bell metal, Speculum metal, and Gunmetal are alloys of Bronze.

Monel metal is an alloy of nickel

Dow metal and Electron metal is an alloy of Magnesium.