civil engineering MCQs – Page 61

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 Review each marked answer and report any item that may be outdated or unclear.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
1201. The total kinetic energy of a hoop of mass 2 kg and radius 4 m sliding with linear velocity 8 m/sec and angular velocity 5 radian/sec is_________________?
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A. 89 J

B. 464 J

C. 400 J

D. 64 J

1202. A cube on a smooth horizontal surface___________________?
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A. cannot be in neutral equilibrium

B. cannot be in stable equilibrium

C. can be in any of these states

D. cannot be in unstable equilibrium

1203. The length of rectangular sedimentation tank should not be more than_______________?
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A. 2B

B. 4B

C. B

D. 8B

1204. The effective size of sand particles used in slow sand filters is_______________?
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A. 0.35 to 0.60 mm

B. 0.60 to 1.00 mm

C. 1.00 to 1.80 mm

D. 0.25 to 0.35 mm
1205. The settling velocity of a particle in a sedimentation tank increases if______________?
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A. the surface area of tank is increased

B. the depth of tank is decreased

C. none of the above

D. particle size is decreased

1206. The treatment of water with bleaching powder is known as________________?
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A. hypochlorination

B. super chlorination

C. dechlorination

D. prechlorination

1207. A block in the shape of a parallelopiped of sides lm x 2m x 3m lies on the surface. Which of the faces gives maximum stable block ?
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A. equally stable on all faces

B. 1 m x 2 m

C. 1 m x 3m

D. 2 m x 3 m
1208. The settling velocity of a particle in a sedimentation tank depends on__________________?
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A. depth of tank

B. surface area of tank

C. both depth and surface area of tank

D. none of the above

1209. When two forces, each equal to P, act at 90 to each other, then the resultant will be_____________?
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A. P

B. P/V2

C. 2P

D. PV2
1210. The rate of filtration in slow sand filters in million litres per day per hectare is about_____________?
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A. 500 to 600

B. 100 to 150

C. 1400 to 1500

D. 50 to 60
1211. The maximum permissible limit for flouride in drinking water is______________?
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A. 5 mg/litre

B. 10 mg/litre

C. 1.5 mg/litre

D. 0.1 mg/litre

1212. The pitot tube is used to measure________________?
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A. velocity at stagnation point

B. stagnation pressure

C. dynamic pressure

D. static pressure

1213. Intrinisic equation of catenary is given by____________________?
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A. S = C cot <p

B. S = C sin cp

C. S = C tan q>

D. S = C cos cp

1214. Most of the bacteria in sewage are______________?
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A. pathogenic

B. saprophytic

C. anaerobic

D. parasitic

1215. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then________________?
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A. the ball will move to the front

B. the bubble will move to the rear </strong>

C. d out which of the above statements are correct ?

D. the ball will move to the rear

E. the bubble will move to the front

1216. The most commonly used sewer under culverts is_______________?
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A. horse-shoe type sewer

B. circular cast iron sewer

C. circular brick sewer

D. semi-elliptical sewer

1217. Least possible value of correction factor for________________?
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A. kinetic energy is zero

B. momentum is zero

C. kinetic energy is 1

D. momentum is 1</strong>

1218. If a projectile is fired with an initial velocity of 10 m/sec at an angle of 60 to the horizontal, its horizontal and vertical velocity at the highest point of trajectory are___________________?
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A. 5 V3 m/sec and 0

B. 0 and 5 m/sec

C. 5 and 5V3 m/sec

D. 5 m/sec and 0
1219. If the average daily consumption of a city is 100,000 m3, the maximum daily consumption on peak hourly demand will be_______________?
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A. 180000m3

B. 100000m3

C. 270000 m3

D. 150000m3

1220. Double filtration is used_______________?
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A. to increase the filtration rapid sand filters capacity of

B. all of the above

C. for isolated buildings like pools, hotels etc swimming

D. to increase the filtration slow sand filters capacity of