civil engineering MCQs – Page 140

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
2781. For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by______________?
comments icon0

A. Frubling

B. All the above

C. Kinchling

D. Lloyd Davis

2782. For design of sewers, percentage of sewage discharge is assumed_____________________?
comments icon0

A. 70 to 75%

B. 75 to 80%

C. 85%

D. 65 to 70%

2783. The gas which may cause explosion in sewers, is_________________?
comments icon0

A. Ammonia

B. Carbon monoxide

C. Carbondioxide

D. Methane
2784. In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is____________________?
comments icon0

A. [(100 + P2)/(100 P1)] V1

B. [(100 P1)/(100 P2)] V1

C. [(100 + P1)/(100 P2)] V1

D. [(100 P1)/(100 + P2)] V1

2785. The non-clog pump which permits solid matter to pass out with the liquid sewage, is________________?
comments icon0

A. None of these

B. Reciprocating pump

C. Centrifugal pump

D. Pneumatic ejector

2786. The property of fluid by virtue of which it offers resistance to shear is called____________________?
comments icon0

A. surface tension

B. viscosity

C. cohesion

D. adhesion

E. all of the above

2787. For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed________________?
comments icon0
A. 4 ppm

B. 10 ppm

C. 5 ppm

D. 3 ppm

2788. The resultant upward pressure of the fluid on an immersed body is called__________________?
comments icon0
A. buoyancy

B. none of above is correct

C. all the above are correct

D. upthrust

E. center of pressure

2789. The maximum depth of sedimentation tanks, is kept__________________?
comments icon0
A. 3 m

B. 3.5 m

C. 4 m

D. 4.5 m

2790. Mercury does not wet glass. This is due to property of liquid known as_________________?
comments icon0

A. cohesion

B. surface tension

C. adhesion

D. viscosity

E. compressibility

2791. Flocculated particles do not change their___________________?
comments icon0

A. Size

B. Shape

C. Weight

D. None of these
2792. If 2% solution of a sewage sample is incubated for 5 days at 20C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is____________________?
comments icon0

A. 225 ppm

B. 250 ppm

C. None of these

D. 200 ppm

2793. The spacing of bars of perforations of fine screens used for the treatment of sewage, is_______________?
comments icon0

A. 3 to 5 mm

B. 8 to 10 mm

C. 2 to 3 mm

D. 5 to 8 mm

2794. Which one of the following resists hydrogen sulphide corrosion ?
comments icon0

A. Glazed stone wares

B. R.C.C.

C. Glazed ware

D. Asbestos cement

2795. For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________?
comments icon0

A. 16 m

B. 24 m

C. 20 m

D. 30 m

2796. In SI units the power of sound is represented in __________________?
comments icon0

A. Newtons

B. Joules

C. Kgs

D. Watts
2797. You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at___________________?
comments icon0

A. Two third full

B. Three fourth full

C. Half full

D. Full depth

2798. When the flow parameters at any given instant remain same at every point, then flow is said to be____________________?
comments icon0

A. quasi static

B. steady state

C. static.

D. uniform

E. laminar

2799. The ratio of absolute viscosity to mass density is known as____________________?
comments icon0

A. coefficient of viscosity

B. specific viscosity

C. viscosity index

D. coefficient of compressibility

E. kinematic viscosity
2800. The resultant upward pressure of the fluid on an immersed body is called_________________?
comments icon0

A. none of above is correct

B. upthrust

C. center of pressure

D. all the above are correct

E. buoyancy