civil engineering MCQs – Page 143

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 Review each marked answer and report any item that may be outdated or unclear.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
2841. Viscosity of water in comparison to mercury is ______________________?
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A. unpredictable.

B. same

C. higher

D. lower

E. higher/lower depending on temperature

2842. The volumetric change of the fluid caused by a resistance is known as_________________?
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A. cohesion

B. volumetric index

C. compressibility

D. adhesion

E. volumetric strain

2843. Choose the correct relationship_________________?
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A. dynamicviscosity = kinematicviscosity x density

B. specific gravity = gravity x density

C. gravity = specific gravity x density

D. kinematicviscosity = dynamicviscosity x density

E. hydrostaticforce = surface tension x gravity.

2844. Free surface of a liquid tends to contract to the smallest possible area due to force of _________________?
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A. friction

B. adhesion

C. cohesion

D. surface tension

E. viscosity

2845. Specific weight of sea water is more that of pure water because it contains ________________?
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A. all of the above

B. heavy water

C. dissolved air

D. suspended matter

E. dissolved salt

2846. Pick up the in-correct statement from the following?
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A. None of these

B. Inlets are generally provided in all sewers

C. Catch basins are generally provided in sewers for carrying drainage discharge

D. Manholes are provided in sewer pipes at suitable intervals

2847. In septic tanks__________________?
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A. The clear space between the baffle top and covering slab is about 7.5 cm

B. The baffles or tees are extended up to top level of scum

C. Free board of 0.3 m may be provided

D. All the above
2848. The sewer that unloads the sewage at the point of treatment is called_________________?
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A. House sewer

B. Outfall sewer

C. Branch sewer

D. Main sewer

2849. The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known_____________________?
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A. House sewer

B. Branch sewer

C. Sewer outfall

D. Lateral sewer

2850. In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept________________?
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A. 10

B. 2

C. 0.25

D. 5

2851. The settlement velocity of a solid (diameter 0.5 mm, specific gravity 1.75) in water having temperature 10C, is______________________?
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A. 500 cm/sec

B. 213.5 cm/sec

C. 413.5 cm/sec

D. 313.5 cm/sec
2852. Dimensions of surface tension are_________________?
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A. MlL r2

B. MlL2T2

C. MlLTx

D. MlLT2

E. MlLt

2853. Surface tension has the units of____________________?
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A. newtons/m

B. newton m

C. newtons

D. newtons/m

E. new tons/m
2854. Alcohol is used in manometers because_____________________?
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A. it has low vapour pressure

B. it is clearly visible

C. is provides suitable meniscus

D. it can provide longer column due to low density

E. it has low surface tension

2855. Pick up the correct statement from the following ?
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A. Turbidity is more in strong sewage

B. All the above

C. The sewage omits offensive odours after four hours

D. The black colour indicates septic sewage

2856. Bio-chemical oxygen demand (BOD) for the first 20 days in generally referred to_______________?
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A. Carbonaceous demand

B. First stage demand

C. Initial demand

D. All of these
2857. The sewage treatment units in which anaerobic decomposition of organic matter is used, are called________________?
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A. None of these

B. Sludge sedimentation tanks

C. Trickling filters

D. Imhoff tanks

2858. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as____________________?
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A. center of gravity

B. center of buoyancy

C. center of pressure

D. none of the above

E. meta center

2859. Density of water is maximum at ___________________?
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A. 20C.

B. 100C

C. 0C

D. 4C

E. 0K

2860. The following is the physical characteristic of sewage___________________?
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A. Colour

B. Odour

C. All the above

D. Turbidity