Explore topic-wise MCQs in Civil Engineering.

This section includes 140 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 formula = - [1.8 + 32] in which is runoff, is annual rain fall in cm, is mean annual temperature in centigrades and is a constant, is known

A. Justin's formula
B. Khosla's formula
C. English formula
D. Vermule's formula.
Answer» C. English formula
Discussion
2.

If is the weight of water per cubic metre, is the discharge in cubic metres per sec and is the total head, the required water horse power of the pump, is

A. none of these.
Answer» B.
Discussion
3.

If the specific capacity of a well is 0.3183 x 10 per sec, the discharge from a well of 4 m diameter under a depression head of 4 m, is

A. 8 litres/sec
B. 10 litres/sec
C. 12 litres/sec
D. 14 litres/sec
E. 16 litres/sec.
Answer» F.
Discussion
4.

The chlorine supply cylinders are generally kept at 38°C to 40°C to prevent

A. conversion into crystals
B. it from burning
C. it from explosion
D. none of these.
Answer» B. it from burning
Discussion
5.

The U.C. (uniformity coefficient) for the best filter media sand should be

A. 2
B. 3
C. 4
D. 5
E. none of these.
Answer» B. 3
Discussion
6.

Derivation of Thiem's formula is based on the assumption

A. the aquifer is homogeneous, isotropic and of infinite depth and area
B. the well is sunk through the full depth of the aquifer
C. the flow lines are radial and horizontal, and the flow is laminar
D. for hydraulic gradient in Darcy's equation, tangent value is used for sine value
E. all the above.
Answer» F.
Discussion
7.

In an artesian acquifer, the draw downs in two observation wells at distances 100 m, and 200 m were found same after one hour and hours respectively. The value of , is

A. 2 hours
B. 4 hours
C. 9 hours
D. 16 hours.
Answer» C. 9 hours
Discussion
8.

Disappearance of pink colour of water of a well due of KMnO indicates that water contains

A. acidity
B. alkalinity
C. turbidity
D. organic matter
E. all the above.
Answer» E. all the above.
Discussion
9.

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 = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula = 1.2 , the water horse power of the pump is

A. 400
B. 450
C. 500
D. 580
E. 600
Answer» F.
Discussion
10.

Normal values of overflow rate for sedimentation tanks using coagulants in litres/hr/m , generally range between

A. 250 to 500
B. 500 to 750
C. 750 to 1000
D. 1000 to 1250
Answer» E.
Discussion
11.

If is population of a city in thousands and is fire demand in litres per minute, for proper estimate of water, the Empirical formula is suggested by

A. National Board of fire under-writers
B. Freeman
C. Kuichling
D. None of these.
Answer» C. Kuichling
Discussion
12.

Normal values of overflow rate for plain sedimentation tanks in litres/hr/m, generally range between

A. 100 to 250
B. 250 to 500
C. 500 to 750
D. 750 to 1000
Answer» D. 750 to 1000
Discussion
13.

The formula for the head loss in conduits is generally known as

A. Hazen-William's formula
B. Manning's formula
C. Darcy-Weisbach formula
D. Nikuradse formula.
Answer» C. Darcy-Weisbach formula
Discussion
14.

The discharge for the confined tube well is obtained from

A. Thiem's formula
B. Darcy's formula
C. Tolman's formula
D. Dupuits formula.
Answer» E.
Discussion
15.

If is discharge is cubicmetres per sec and is the economical diameter of the pipe. According to Lea

A. = 0.67 to 0.87
B. = 0.77 to 0.97
C. = 0.97 to 1.22
D. = 1.22 to 1.33
E. .
Answer» D. = 1.22 to 1.33
Discussion
16.

In the equation of a logistic curve of population growth, the constant is

A. x
B. .
Answer» D.
Discussion
17.

The fire demand for ascertaining the empirical formula known as

A. Kuichling's formula
B. Buston's formula
C. Freeman formula
D. Under Writers formula
E. None of these.
Answer» D. Under Writers formula
Discussion
18.

The equation in which is yearly run off in cm, is yearly total rainfall in cm, is difference of R.L.s. of lowest and highest points and is area of catchment in square metres, is known as

A. English formula
B. Khosla's formula
C. Justin's formula
D. Vermule's formula.
Answer» D. Vermule's formula.
Discussion
19.

If is the diameter of the pipe, is the total internal pressure, is the permissible tensile stress and is the effective of the joint, the thickness of metal pipe, is

A. none of these.
Answer» C.
Discussion
20.

Mostly used coagulant, is

A. chlorine
B. alum
C. lime
D. bleaching powder.
Answer» C. lime
Discussion
21.

For estimating the run off of catchments, the mean value of the constant '' in the Khosla's formula = - (1.8 + 32) is

A. 1.21
B. 1.23
C. 1.25
D. 1.27
E. 1.31
Answer» E. 1.31
Discussion
22.

If is the specific gravity of particles of diameter , the velocity of settlement in still water at °C, according to Stoke's law, is

A. none of these.
Answer» B.
Discussion
23.

For the same draw down in two observations wells at distances and , the times after start of pumping are and hours respectively. The relation which holds good is

A. none of these.
Answer» C.
Discussion
24.

and are monsoon duration factor and catchment factor respectively. If is yearly rainfall in cm, runoff can be calculated by

A. velocity area method
B. weir or spillway method
C. use of venturi-meter
D. using power plant consumption
E. none of these.
Answer» B. weir or spillway method
Discussion
25.

For 3.25 x 10 cumecs discharging from a well, a pump is installed to lift water against a total head of 30 m. The minimum required horse power, is

A. 10 H.P.
B. 15 H.P.
C. 18 H.P.
D. 20 H.P.
E. 25 H.P.
Answer» E. 25 H.P.
Discussion
26.

The difference in the reservoir level and the lowest point of the water mains is 180 m. The expected pressure due to water hammer is 7.5 kg/cm in a pressure conduit of diameter 1 m. Assuming the efficiency of the riveted joints of the pipe as 0.6 and minimum cover 3 mm for corrosion, the thickness of the pipe materials, is

A. 10 mm
B. 15 mm
C. 20 mm
D. 25 mm
E. 30 mm.
Answer» D. 25 mm
Discussion
27.

, , be the populations of a city at times , and = 2, the saturation value of the population of the city, is

A. None of these.
Answer» B.
Discussion
28.

Most satisfactory formula for an estimate of fire demand for a city of population in thousands for Indian conditions, is

A. = 1640
B. (1 - 0.01
C. )
D. = 3180
E. none of these.
Answer» D. = 3180
Discussion
29.

If is total consumption of water in litres for a population of individuals, per capita consumption or water allowance for the water supply , is given by

A. none of these.
Answer» D.
Discussion
30.

Specific yield of a well is

A. quantity of water than can be drawn from the well
B. flow of water per unit time
C. total quantity of water available in the well
D. quantity of water per unit time per unit draw-down.
Answer» D. quantity of water per unit time per unit draw-down.
Discussion
31.

In a well planned city, the layout of distribution pipes generally adopted, is

A. grid-iron system
B. interlaced system
C. reticulation system
D. all the above.
Answer» E.
Discussion
32.

For a network of distribution pipes of a proposed township shown in the below figure, the layout of distribution system, is

A. dead end system
B. grid-iron system
C. ring system
D. radial system.
Answer» E.
Discussion
33.

One degree of hardness of water means a content of salts of

A. 10.25 mg/litre
B. 12.25 mg/litre
C. 14.25 mg/litre
D. 16.25 mg/litre.
E. 20 mg/litre.
Answer» D. 16.25 mg/litre.
Discussion
34.

Standard process of chlorination of water, is done by

A. plain chlorination
B. pre-chlorination
C. post-chlorination
D. double chlorination.
Answer» D. double chlorination.
Discussion
35.

Rapid gravity filter can only remove turbidity of water upto

A. 15 to 25 gm/litre
B. 25 to 30 gm/litre
C. 30 to 35 cm/litre
D. 35 to 40 gm/litre
E. 50 gm/litre.
Answer» E. 50 gm/litre.
Discussion
36.

Mud balls may be removed by

A. breaking and washing
B. washing the filter with a solution of caustic soda
C. removing, cleaning and replacing the damaged sand
D. all the above.
Answer» E.
Discussion
37.

In a rapid sand filter, air binding is caused due to excessive

A. negative pressure
B. pressure
C. turbidity
D. water pressure
E. all the above.
Answer» B. pressure
Discussion
38.

After cleaning a slow sand filter, the filtered water is not used for

A. 6 hours to 12 hours
B. 12 hours to 18 hours
C. 18 hours to 24 hours
D. 24 hours to 36 hours
E. 48 hours.
Answer» E. 48 hours.
Discussion
39.

The period of cleaning of a slow sand filter, is usually

A. 5 to 10 days
B. two weeks to three weeks
C. one month to three months
D. three months to six months
E. one year.
Answer» D. three months to six months
Discussion
40.

Detention period of a settling tank is

A. average theoretical time required for water to flow through the tank
B. time required for flow of water to fill the tank fully
C. average time for which water is retained in tank
D. ratio of volume of basin of a sedimentation tank to the rate of flow
E. all the above.
Answer» F.
Discussion
41.

If L, B and D length, breadth and depth of water in a rectangular sedimentation tank of total discharge Q, the settling velocity, is

A. [A].
B. [B].
C. [C].
D. [D].
E. [E].
Answer» E. [E].
Discussion
42.

If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water at T°C, according to Stoke's law, is

A. [A].
B. [B].
C. [C].
D. [D].
E. none of these.
Answer» B. [B].
Discussion
43.

For controlling algae, the most commonly used chemical, is

A. copper sulphate
B. alum
C. lime
D. bleaching powder.
Answer» B. alum
Discussion
44.

Bacterias which can survive with or without free oxygen, are known

A. aerobic bacterias
B. anerobic bacterias
C. facultative bacterias
D. none of these.
Answer» D. none of these.
Discussion
45.

For complete stabilisation of organic matter in polluted water, it takes

A. 5 days
B. 10 days
C. 20 days
D. 30 days
E. 40 days.
Answer» E. 40 days.
Discussion
46.

For maximum alkalinity of water, pH value should be

A. zero
B. less than 7
C. more than 7
D. 14
E. 21
Answer» E. 21
Discussion
47.

Standard unit of turbidity of water is in one litre of distilled water, one milligram of finely divided

A. silica
B. mud
C. clay
D. organic matter.
Answer» B. mud
Discussion
48.

If w is the weight of water per cubic metre, Q is the discharge in cubic metres per sec and H is the total head, the required water horse power of the pump, is

A. [A].
B. [B].
C. [C].
D. [D].
E. none of these.
Answer» B. [B].
Discussion
49.

For calculation of economical diameter D of a pipe in metres for a discharge Q to be pumped in cumecs, Lea suggested the empirical formula

A. D = 0.22 Q
B. D = 1.22 Q
C. D = 2.22 Q
D. D = 3.22 Q
E. D = 1.33 Q.
Answer» C. D = 2.22 Q
Discussion
50.

The valve shown in the below figure, is generally known as

A. air valve
B. pressure relief valve
C. sluice valve
D. none of these.
Answer» C. sluice valve
Discussion