Explore topic-wise MCQs in Civil Engineering.

This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

The yield of a rapid gravity filter as compared to that of slow sand filter, is~!

A. 10 times
B. 15 times
C. 20 times
D. 30 times
Answer» E.
Discussion
2.

*$_Time of concentration?

A. is the time taken, for precipitation
B. duration of rainfall.
C. time taken for all the ran off to reach the drain
D. time taken for the storm water to travel from the most remote point to the drain.
Answer» E.
Discussion
3.

*/*_When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied?

A. By pumping system
B. By gravitational system
C. Both (A) and (B)
D. All the above
Answer» C. Both (A) and (B)
Discussion
4.

*/*_Surge tanks are used?

A. for storage water
B. to increase the velocity in a pipeline
C. as overflow valves
D. to guard against water hammer
Answer» E.
Discussion
5.

*/*_If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is?

A. 1880 kilo litres
B. 2880 kilo litres
C. 3880 kilo litres
D. 4880 kilo litres
Answer» C. 3880 kilo litres
Discussion
6.

*/*_Asbestos pipes are?

A. light in weight and easy to transport
B. highly resistant to corrosion
C. very much smooth and hydraulically efficient
D. all the above
Answer» E.
Discussion
7.

*/*_In centrifugal pump installation,?

A. Pump is properly primed before starting
B. The diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe
C. The motor may burn out if it is started with empty delivery pipe and with open gate valve
D. All the above
Answer» E.
Discussion
8.

*/*_Specific capacity or yield of wells, is generally expressed, as?

A. m³/sec
B. m³/hour
C. m³/hour/m²
D. m³/hour/m²/m
Answer» E.
Discussion
9.

%_The specific retention is least in case of_%

A. Clay
B. Sand
C. Silt
D. Coarse gravel.
Answer» E.
Discussion
10.

_ In slow sland filters, the turbidity of raw water can be removed only up to$?

A. 60 mg/litre
B. 75 mg/litre
C. 100 gm/litre
D. 150 mg/litre
Answer» B. 75 mg/litre
Discussion
11.

_ According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for$?

A. Boarding schools
B. Nurses home and medical quarters
C. hostels
D. all the above
Answer» E.
Discussion
12.

_ In distribution pipes, drain valves are provided at$?

A. lower point
B. higher point
C. junction points
D. any where
Answer» B. higher point
Discussion
13.

_ In pressure supply mains, water hammer pressure is reduced by providing$?

A. Sluice valves
B. Air valves
C. Pressure relief valves
D. None of these
Answer» D. None of these
Discussion
14.

_ Disinfection of drinking water, is done to remove$?

A. odour
B. bacterias
C. turbidity
D. colour
Answer» C. turbidity
Discussion
15.

_ Pick up the incorrect statement from the following. The underground sources of water, is from$?

A. wells
B. springs
C. infiltration wells
D. storage reservoirs
Answer» E.
Discussion
16.

_Acidity in water is caused due to$?

A. Mineral acids
B. Free CO‚ÇÇ
C. Aluminium sulphate
D. All the above.
Answer» E.
Discussion
17.

_By boiling water, hardness can be removed if it is due to$?

A. calcium sulphate
B. magnesium sulphate
C. calcium nitrate
D. calcium bicarbonate
Answer» E.
Discussion
18.

_Surcharge storage zone of a reservoir, is$?

A. Below dead storage
B. Between dead storage and useful storage
C. Above useful storage
D. Also known as valley storage
Answer» D. Also known as valley storage
Discussion
19.

_While determining the yield of open wells by the pumping test$?

A. Velocity of recharging water, increases with depression head
B. Depression head resulting at critical velocity, is called critical depression head
C. Working head is generally limited to ?rd of the critical depression head
D. Maximum safe yield of an open well, is expected at critical depression head
Answer» E.
Discussion
20.

_The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is$?

A. 2 m
B. 2.25 m
C. 2.50 m
D. 3.00 m
Answer» E.
Discussion
21.

_Sunlight$?

A. helps growth of bacterias
B. impedes growth of algae
C. increases dissolved oxygen content
D. reduces turbidity
Answer» C. increases dissolved oxygen content
Discussion
22.

_Aeration of water is done to remove$?

A. odour
B. colour
C. bacterias
D. hardness
Answer» B. colour
Discussion
23.

_Corrosion of well pipes may not be reduced by$?

A. reducing the draw down and the pumping rate
B. reducing the flow velocity
C. using thicker pipes
D. using screens having larger area of openings
Answer» E.
Discussion
24.

Mathamoglobinemia or blue baby disease is caused due to?

A. Chlorides
B. Nitrites
C. Nitrates
D. Sulphides
Answer» D. Sulphides
Discussion
25.

To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 ‚à öQ, the water horse power of the pump is#

A. 400
B. 450
C. 500
D. 600
Answer» E.
Discussion
26.

The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level#

A. 1500 m
B. 1505 m
C. 1475 m
D. 1485 m
Answer» E.
Discussion
27.

If the chosen diameter of a pipe, is less than the economical diameter

A. Cost of pipe will be less
B. Head loss will be high
C. Cost of pumping will be more than saving
D. All the above
Answer» E.
Discussion