civil engineering MCQs – Page 64

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 Review each marked answer and report any item that may be outdated or unclear.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
1261. Which of the following velocity potentials satisfies continuity equation ?
comments icon0

A. cosx

B. x2y

C. x2 + y2

D. x2-y2
1262. Alum as a coagulant is found to be most effective when pH range of water is______________?
comments icon0

A. 4 to 6

B. 2 to 4

C. 6 to 8

D. 8 to 10

1263. Corrosion in concrete sewers is caused by______________?
comments icon0

A. dissolved oxygen

B. nitrogen

C. chlorine

D. septic conditions
1264. If the kinetic energy and potential energy of a simple harmonic oscillator of amplitude A are both equal to half the total energy, then the displacement is equal to_________________?
comments icon0

A. A

B. AV2

C. A/V2

D. A/2

1265. The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is______________?
comments icon0
A. 4 ppm

B. 1 ppm

C. 10 ppm

D. 40 ppm

1266. The hourly variation factor is usually taken as______________?
comments icon0

A. 1.8

B. 2.7

C. 2

D. 1.5
1267. The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to____________________?
comments icon0

A. r

B. 1/r

C. log r

D. r2
1268. The discharge over a broad crested weir is maximum when the depth of flow is_______________?
comments icon0

A. H/2

B. 2 H/5

C. 2 H/3

D. H/3

1269. Which of the following methods of analysis of water distribution system is most suitable for long and narrow pipe system ?
comments icon0

A. electrical analysis method

B. equivalent pipe method

C. circle method

D. Hardy cross method

1270. In a forced vortex motion, the velocity of flow is________________?
comments icon0

A. inversely proportional to its radial distance from the axis of rotation

B. inversely proportional to the square of its radial distance from the axis of rotation

C. directly proportional to its radial distance from axis of rotation

D. directly proportional to the square of its radial distance from the axis of rotation

1271. The velocity of flow of water in a sedimentation tank is about__________________?
comments icon0

A. 15 to 30 cm/hour

B. 5 to 10 cm/sec.

C. 15 to 30 cm/minute

D. 15 to 30 cm/sec.

1272. Newtons law of viscosity relates________________?
comments icon0
A. shear stress and rate of angular deformation

B. shear stress, viscosity and temperature

C. viscosity and rate of angular deformation

D. intensity of pressure and rate of angular deformation

1273. With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on__________________?
comments icon0
A. a circular disc of plate held normal to flow

B. a streamlined body

C. a cylinder

D. a sphere

1274. The working conditions in imhoff tanks are_______________?
comments icon0

A. aerobic in lower compartment and anaerobic in upper compartment

B. aerobic only

C. anaerobic only

D. anaerobic in lower compartment and aerobic in upper compartment
1275. Which of the following is not a water borne disease ?
comments icon0

A. dysentery

B. typhoid

C. maleria

D. cholera

1276. As compared to cast iron pipes, steel pipes are______________?
comments icon0

A. heavier

B. costlier

C. stronger

D. less susceptible to corrosion

1277. The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is__________________?
comments icon0
A. laminar flow

B. not predictable from the given data

C. turbulent flow

D. transition flow

1278. Settling velocity increases with_______________?
comments icon0

A. specific gravity of solid particles

B. temperature of liquid

C. depth of tank

D. size of particles

1279. If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is__________________?
comments icon0
A. 9/4

B. 2-Mar

C. 3-Apr

D. 27/8

1280. The major loss of energy in long pipes is due to_______________?
comments icon0

A. gradual contraction or enlargement

B. sudden contraction

C. friction

D. sudden enlargement