civil engineering MCQs – Page 132

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 Review each marked answer and report any item that may be outdated or unclear.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
2621. For a continuous flow type of sedimentation tanks__________________?
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A. Length of the tank is normally kept 4 to 5 times the width

B. All the above

C. Width of the tank is normally kept about 6 m

D. Maximum horizontal flow velocity is limited to 0.3 m/minute

2622. What refers to the residual value of a companys assets after all outside liabilities (shareholders excluded) have been allowed for ?
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A. Return

B. Dividend

C. Par value

D. Equity
2623. Salvage value is sometimes known as _____________________?
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A. Second-hand value

B. Junk value

C. Scrap value

D. Going value

2624. The functional depreciation is sometimes called ____________________?
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A. Failure depreciation

B. Adolescence

C. Life depreciation

D. Demand depreciation

2625. Pick up the correct statement from the following?
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A. The water supply pipes get clogged if flow velocity is less than self cleansing velocity

B. The sewers may be carried up and down the hills and valleys

C. The water supply pipes carry pure water free from solid particles

D. The sewer pipes are generally laid along level hills

2626. Pick up the correct statement from the following ?
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A. Phase of a wave is expressed as a fraction of a period with respect to a reference

B. The reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction

C. All of these

D. Phase is usually specified by angular measure with one period being 360

2627. Design period of 40 to 50 years is adopted for_________________?
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A. All the above

B. Main sewers

C. Branch sewers

D. Trunk sewers

2628. If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is_________________?
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A. 100 cm

B. 50 cm

C. 90 cm

D. 80 cm

2629. The depletion allowance method of computing depletion is commonly known as ___________________?
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A. Factor method

B. Unit method

C. Percentage method

D. Sinking fund method

2630. Which one of the following statements is correct ?
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A. During the day, earth reflects solar radiation

B. During the day, earth reflects both solar radiations the emission from its surface

C. During the night, earth emits radiation from its surface

D. All of these
2631. If the grit in grit chambers is 4.5 million litres per day, its cleaning is done____________________?
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A. Hydraulically

B. Mechanically

C. Electrically

D. Manually
2632. The design period of sewage treatment works in normally_________________?
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A. 30 40 years

B. 40 50 years

C. 5 10 years

D. 15 20 years
2633. Pick up the correct statement from the following?
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A. The relative phase difference between the waves is important and not the absolute phase of a point on the wave

B. The wave whose surface of constant phase are parallel planes, is known as a plane wave

C. All of these

D. The surface defined by the locus of points having same phase, is called a wave front

2634. The design period in years for pumping plants, is___________________?
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A. 2 to 3

B. 5 to 10

C. 1

D. 3 to 5

2635. Lead acetate test in sewer manhole is done to test the presence of ____________________?
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A. Diesel vapours

B. Methane gas

C. Hydrogen sulphide

D. Carbondioxide gas

2636. Assertion A. : Discharging the effluents from the oxidation ponds just up stream of lakes or reservoirs is undesirable. Reason (R) : The discharged algae get settled in the reservoirs and cause anaerobic decomposition and other water qualities_________________?
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A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true but R is not a correct explanation of A

C. A is true but R is false

D. A is false but R is true

2637. In a trickling filter_________________?
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A. Filtration process is used

B. Biological action is used

C. Neither A. nor B.

D. Both A. and B.

2638. What do you call a one-time credit against taxes ?
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A. Due credit

B. Revenue credit

C. Credible credit

D. Tax credit
2639. The pressure exerted by_____________?
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A. All the above

B. The internal pressure if any, causes tensile stress in the pipe material

C. Pressure sewers are designed to be safe in tension

D. The sewage when running full from inside, is called internal pressure

2640. The quantity of liquid waste which flows in sewers during the period of rainfall, is known__________________?
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A. Sanitary sewage

B. Industrial waste

C. Storm sewage

D. None of these