civil engineering MCQs – Page 124

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 Review each marked answer and report any item that may be outdated or unclear.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
2461. Pick up the correct statement from the following ?
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A. Rate of digestion of sludge is more at higher temperature

B. Mesophilic organisms digest the sludge if the temperature is between 25 and 40C

C. Thermophilic organisms digest the sludge if the temperature ranges from 40 to 60C

D. All the above
2462. What do you call the after-tax present worth of all depreciation effects over the depreciation period of the asset ?
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A. Depreciation recovery

B. Period recovery

C. After-tax recovery

D. Asset recovery

2463. In trickling filter, B.O.D. is reduced to___________________?
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A. 80 to 90%

B. 40 to 60%

C. 30 to 40%

D. 60 to 80%
2464. Which is true about partnership ?
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A. Its capitalization must be equal for each partner

B. It can be handed down from one generation of partners to another

C. It has a perpetual life

D. It will be dissolved if one of the partners ceases to be connected with the partnership

2465. For design purposes, the normal rate of infiltration of ground water into the sewer, is___________________?
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A. 1500 litres/km/cm

B. 500 litres/km/cm

C. 2000 litres/km/cm

D. 1000 litres/km/cm

2466. What refers to an imaginary cost representing what will not be received if a particular strategy is rejected ?
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A. Ghost cost

B. Opportunity cost

C. Null cost

D. Horizon cost

2467. The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be__________________?
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A. 1.5 m

B. 1.2 m

C. 0.9 cm

D. > 1.5 m
2468. In a grit chamber of a sewage treatment plant ____________________?
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A. Depth of 0.9 m to 1.20 m is kept

B. All the above

C. One minute of detention period is kept

D. Flow velocity 0.15 m to 0.3 m/sec is kept

2469. For large sewers, maximum distance between manholes may be_______________?
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A. 200 m

B. 50 m

C. 100 m

D. 300 m
2470. A manhole is generally provided at each__________________?
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A. Bend

B. Junction

C. Change of gradient

D. All the above
2471. In what method of computing depreciation where it assumes that the annual cost of depreciation is a fixed percentage of the book value at the beginning of the year ?
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A. Sinking fund method

B. Straight line method

C. Sum-of-year digit method

D. Declining balance method
2472. If the flame of a miners safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains_______________?
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A. Carbon dioxide

B. Oxygen

C. Methane

D. Hydrogen sulphide

2473. The profit derived from a project or business enterprise without consideration of obligations to financial contributors and claims of others based on profit is known as _____________________?
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A. Economic return

B. Yield

C. Earning value

D. Gain

2474. What is a government bond which has an indefinite life rather than a specific maturity ?
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A. T-bill

B. Coupon

C. Consol

D. Debenture

2475. In very first stage of decomposition of the organic matter in sewage________________?
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A. Carbondioxide is formed

B. Ammonia is formed

C. Nitrates are formed

D. Nitrites are formed

2476. Which one of the following gases is most significant as air pollutant ?
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A. Nitrogen

B. Oxygen

C. Sulphur-dioxide

D. Carbondioxide

2477. For drainage pipes in buildings the test applied before putting them to use, is__________________?
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A. Smoke test

B. All the above

C. Straightness test

D. Water test

2478. What stock represents ownership and enjoys certain preferences than ordinary stock ?
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A. Incorporators stock

B. Authorized stock

C. Preferred stock

D. Presidential stock

2479. The self-cleansing velocity of water flowing through pipe lines, is___________________ ?
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A. 2 metres/sec

B. 0.5 metre/sec

C. 0.25 metre/sec

D. 1 metre/sec

2480. Capitalized cost of any structure or property is computed by which formula ?
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A. First cost + cost of perpetual maintenance

B. First cost + salvage value

C. Annual cost interest of first cost

D. First cost + interest of first cost