civil engineering MCQs – Page 307

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 Review each marked answer and report any item that may be outdated or unclear.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

6121. At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_______________?
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A. minimum

B. zero

C. maximum

D. negative value

E. could be any value

6122. Bernoulli equation deals with the law of conservation of____________________?
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A. momentum

B. mass

C. force

D. energy

E. work

6123. A metal with specific gravity of o floating in a fluid of same specific gravity a will___________________?
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A. none of the above

B. partly immersed

C. be fully immersed with top surface at fluid surface

D. float over fluid

E. sink to bottom

6124. In aerodynamics, hypersonic flow generally begins above which Mach number?
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A. unity

B. Mach 5

C. greater than unity

D. greater than 2

E. greater than 10

6125. Working principle of dead weight pressure gauge tester is based on __________________?
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A. Newtons law of viscosity .

B. Second law of thermodynamic

C. Pascals law

D. Daltons law of partial pressure

E. Avogadros hypothesis

6126. Why has mercury traditionally been used in liquid-column barometers?
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A. It is the best liquid for every instrument

B. Its high density keeps the column relatively short

C. Its vapor pressure is very low

D. Both B and C

E. It moves more easily than every other liquid

6127. The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as___________________?
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A. turbulent flow

B. steady flow

C. one dimensional flow

D. streamline flow

E. uniform flow

6128. The capillary rise at 20C in a clean glass tube of 1 mm bore containing water is ap-proximately_______________?
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A. 10 mm

B. 30 mm

C. 1 mm

D. 20 mm

E. 5 mm

6129. The capillary rise at 20C in a clean glass tube of 1 mm bore containing water is ap-proximately____________________?
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A. 20 mm

B. 1 mm

C. 10 mm

D. 30 mm

E. 5 mm

6130. The difference of pressure between the inside and outside of a liquid drop is_____________?
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A. = Txr

B. none of the above

C. p = 2T/r

D. p = T/2r

E. = T/r

6131. Capillary action is due to the__________________?
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A. cohesion of the liquid

B. none of the above

C. adhesion of the liquid molecules and the molecules on the surface of a solid

D. surface tension

E. all of the above

6132. The time oscillation of a floating body with increase in metacentric height will be________________?
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A. same

B. unpredictable

C. lower

D. lower/higher depending on weight of body

E. higher

6133. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as____________________?
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A. center of gravity

B. meta center

C. none of the above

D. center of buoyancy

E. center of pressure

6134. True one-dimensional flow occurs when___________________?
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A. the magnitude and direction of the velocity do not change from point to point in the fluid

B. the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

C. the direction and magnitude of the veiocity at all points are identical

D. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

E. velocity, depth, pressure etc. change from point to point in the fluid flow

6135. Hydrometer is used to determine________________?
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A. density

B. specific gravity of gases

C. specific gravity of solids

D. specific gravity of liquids

E. relative humidity

6136. If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water___________________?
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A. 52.2 cm

B. 50 cm

C. 51 cm

D. 51.7 cm

E. 52 cm

6137. According to Bernoullis equation for steady ideal fluid flow_______________?
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A. velocity and pressure are inversely proportional

B. the energy is constant along a stream-line but may vary across streamlines

C. principle of conservation of mass holds

D. total energy is constant throughout

E. none of the above

6138. Centre of pressure compared to e.g. is______________?
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A. above it

B. above or below depending on area of body

C. at same point

D. none of the above

E. below it

6139. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to___________________?
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A. head of water (h)

B. h3/1.

C. V/T

D. h2

E. h2

6140. The atmospheric pressure with rise in altitude decreases____________________?
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A. first steeply and then gradually

B. first slowly and then steeply

C. linearly

D. none of the above

E. unpredictable

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