civil engineering MCQs – Page 66

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 Review each marked answer and report any item that may be outdated or unclear.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
1301. The maximum value of the horizontal range for a projectile projected with a velocity of 98 m/sec is__________________?
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A. 1960 m

B. 980 m

C. 98 m

D. 490 m

1302. The type of valve which is provided to control the flow of water in the distribution system at street corners and where the pipe lines intersect is_______________?
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A. scour valve

B. safety valve

C. check valve

D. sluice valve
1303. Which of the following causes a decrease in per capita consumption ?
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A. use of metering system

B. better standard of living of the people

C. hotter climate

D. good quality of water

1304. The means of access for inspection and cleaning of sewer line is known as_______________?
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A. catch basin

B. drop manhole

C. manhole

D. inlet

1305. The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is____________________?
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A. reflux valve

B. air relief valve

C. sluice valve

D. pressure relief valve

1306. Chlorine demand of water is equal to________________?
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A. residual chlorine

B. applied chlorine

C. sum of applied and residual chlorine

D. difference of applied and residual chlorine
1307. The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about______________?
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A. 0.01 to 0.05 ppm

B. 0.05 to 0.5 ppm

C. 0.5 to 1.0 ppm

D. 1.0 to 5.0 ppm

1308. The effect of increasing diameter of sewer on the self cleansing velocity is_____________?
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A. fluctuating

B. to decrease it

C. nil

D. to increase it
1309. For a non-concurrent force system to be in equilibrium__________________?
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A. only the closure of force polygon is sufficient

B. only the closure of funicular polygon is sufficient

C. both force polygon and funicular polygon must close

D. none of the above

1310. The main disadvantage of cement concrete sewers is________________?
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A. difficulty in transportation due to heavy weight

B. difficulty in construction

C. less strength

D. less life

1311. The dimensions of Gravitational Universal constant G are______________?
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A. M-2L3T2

B. ML3T2

C. M-L2r2

D. M-L3r2
1312. The depression of water table in a well due to pumping will be maximum_______________?
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A. at a distance R/2 from the well

B. none of the above

C. re R is the radius of influence

D. at a distance R from the well

E. close to the well
1313. A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about__________________?
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A. 5-Jan

B. 2-Jan

C. 1/4

D. 3-Jan

1314. The detention period in coagulation tanks is usually kept as_______________?
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A. 30 to 45 minutes

B. 2 to 6 days

C. 1 to 2 minutes

D. 2 to 6 hours
1315. A body is dropped from a height of 100 m and at the same time another body is projected vertically upward with a velocity of 10 m/sec. The two particles will____________________?
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A. meet after 5 sec

B. never meet

C. meet after 1 sec

D. meet after 10 sec
1316. Sewage treatment units are normally designed for______________?
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A. 40-50 years

B. 30-40 years

C. 5-10 years

D. 15-20 years
1317. The minimum and maximum diameters of sewers shall preferably be_________________?
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A. 60 cm and 300cm

B. 15 cm and 100 cm

C. 30 cm and 450 cm

D. 15 cm and 300 cm
1318. Composting and lagooning are the methods of_______________?
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A. sedimentation

B. filtration

C. sludge disposal

D. sludge digestion

1319. For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is_______________?
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A. dependent on relative roughness only

B. a function of Reynolds number and relative roughness

C. constant

D. dependent only on Reynolds number
1320. In facultative stabilization pond, the sewage is treated by________________?
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A. dual action of aerobic bacteria and anaerobic bacteria

B. aerobic bacteria only

C. sedimentation

D. algae only