civil engineering MCQs – Page 141

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 Review each marked answer and report any item that may be outdated or unclear.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

2801. A fluid in equilibrium cant sustain_________________?
0

A. compressive stress

B. bending stress

C. all of the above

D. shear stress

E. tensile stress

2802. A pressure of 25 m of head of water is equal to________________?
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A. 245 kN/m2

B. 12.5 kN/m2

C. 2.5kN/m2

D. 25 kN/m2

E. 2500 kN/m2

2803. The sewage is pumped up_______________?
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A. All the above

B. From flat areas

C. From basements

D. From low lying areas

2804. For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of___________________?
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A. 160 cm

B. 120 cm

C. 100 cm

D. 140 cm

2805. It is customary to design a sewer for D.W.F. on the basis of________________?
0

A. Twice the average demand

B. Thrice the average demand

C. Four times the average demand

D. Average demand

2806. Aerobic activity is maximum_______________?
0

A. In sewer treatment plants

B. At sewer pipes

C. None of these

D. In freshly produced sewage

2807. The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called_______________?
0

A. Windrow

B. None of these

C. A heap

D. Plateau

2808. Hazens formula VS = 418 (GS Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter______________________?
0

A. Less than 0.1 mm

B. Less than 0.05 mm

C. Greater than 0.1 mm

D. Less than 0.01 mm

2809. The discharge per unit plan area of a sedimentation tank, is generally called________________?
0

A. Surface loading

B. Over flow velocity

C. Over flow rate

D. All the above

2810. In case of Imhoff tanks_____________________?
0

A. Detention period is 2 hours

B. All the above

C. The shape is rectangular

D. The velocity of flow is restricted to 0.30 m/minute

2811. The ratio of minimum hourly flow to the average flow of sewage is_________________?
0

A. 4-Jan

B. 2-Jan

C. 4-Mar

D. 1/3

2812. Sewer manholes are generally provided at________________?
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A. All of these

B. The junctions of sewers

C. The change of direction

D. The change of gradient

2813. The most effective arrangement for diverting excess storm water into a natural drainage, is____________________?
0

A. Overflow weir

B. None of these

C. Leaping weir

D. Siphon spill way

2814. Water content of sewage is about___________________?
0

A. 90%

B. 9.9 %

C. 99%

D. 95%

2815. The units of viscosity are__________________?
0

A. none of the above

B. kg sec/metre

C. metres2 per sec

D. newton-sec per metre

E. newton-sec per metre2

2816. Antisyphonage pipe is fitted_______________?
0

A. At the beginning of sewer line

B. With a W.C. trap

C. At the end of septic tanks

D. On manholes

2817. The asbestos cement pipes are generally laid___________________?
0

A. Vertically

B. At an angle of 60

C. Horizontally

D. At an angle of 30

2818. The normal stress in a fluid will be constant in all directions at a point only if_________________?
0

A. it is frictionless

B. it is incompressible

C. it has zero viscosity

D. it is at rest.

E. it has uniform viscosity

2819. If the flame of a miners safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?
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A. Oxygen

B. Methane

C. Carbon dioxide

D. Hydrogen sulphide

2820. The conditions for the stable equilibrium of a floating body are_______________?
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A. the center of buoyancy and the center of gravity must lie on the same vertical line

B. a righting couple should be formed

C. all the above are correct

D. none of the above is correct

E. the meta-center should lie above the center of gravity

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