civil engineering MCQs – Page 150

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 Review each marked answer and report any item that may be outdated or unclear.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

2981. An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of_________________?
0

A. 1.2

B. 1.25

C. 0.8

D. 0.75

E. 1

2982. In a free vortex motion, the radial component of velocity everywhere is ________________?
0

A. unpredictable

B. maximum

C. non-zero and finite

D. minimum

E. zero

2983. The total energy of each particle at various places in the case of perfect incompres sible fluid flowing in continuous sream________________?
0

A. remains constant

B. unpredictable

C. may increase/decrease

D. keeps on decreasing

E. keeps on increasing

2984. In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 9. Sensitivity of inclined tube to sensitivity of U-tube is equal to_________________?
0

A. cos 9

B. sin 9

C. casS

D. tan 9

E. sin 9

2985. The two important forces for a floating body are___________________?
0

A. buoyancy, gravity

B. gravity, pressure

C. buoyancy, pressure

D. buoyancy, inertial

E. inertial, gravity

2986. Working principle of dead weight pressure gauge tester is based on __________________?
0

A. Avogadros hypothesis

B. Pascals law

C. Second law of thermodynamic

D. Newtons law of viscosity .

E. Daltons law of partial pressure

2987. The normal stress is same in all directions at a point in a fluid ___________________?
0

A. only when the fluid is frictionless

B. when there is no motion of one fluid layer relative to an adjacent layer

C. irrespective of the motion of one fluid layer relative to an adjacent layer

D. in case of an ideal fluid

E. only when the fluid is incompressible and has zero viscosity

2988. If the surface of liquid is convex, men_________________?
0

A. cohesion pressure is increased

B. cohesion pressure is negligible

C. there is no cohesion pressure

D. cohesion pressure is decreased

E. none of the above

2989. The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if __________________?
0

A. the area is vertical

B. all of the above

C. none of the above

D. the area is horizontal

E. the area is inclined

2990. A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is __________________?
0

A. 9,000 kg

B. 18,000 kg

C. 30,000 kg

D. 13,500 kg

E. 27,000 kg

2991. The peoperty by virtue of which a liquid opposes relative motion between its different layers is called_________________?
0

A. cohesion

B. surface tension

C. co-efficient of viscosity

D. viscosity

E. osmosis

2992. Which of the following instrument can be used for measuring speed of a submarine moving in deep sea_________________?
0

A. Venturimeter

B. pitot tube

C. rotameter

D. hot wire anemometer

E. Orifice plate

2993. Which of the following instrument can be used for measuring speed of an aeroplane ________________?
0

A. Venturimeter

B. hot wire anemometer

C. pitot tube

D. Orifice plate

E. rotameter

2994. Metacentre is the point of intersection of _________________________?
0

A. buoyant force and the center line of body

B. none of the above

C. all of the above

D. mid point between e.g. and center of buoyancy

E. vertical upward force through e.g. of body and center line of body

2995. The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is ______________________?
0

A. 2.5 m

B. 2.4 m

C. 5.0 m

D. 3.0 m

E. 4.0 m

2996. For pipes, laminar flow occurs when Roynolds number is__________________?
0

A. between 2000 and 4000

B. more than 4000

C. less than 4000

D. none of the above

E. less than 2000

2997. Ratio of inertia force to elastic force is known as _____________________?
0

A. Webers number

B. Reynolds number

C. Froude number

D. Mach number

E. none of the above

2998. The region between the separation streamline and the boundary surface of the solid body is known as_________________?
0

A. drag

B. wake

C. boundary layer

D. lift

E. aerofoil section

2999. During the opening of a valve in a pipe line, the flow is___________________?
0

A. steady

B. free vortex type

C. uniform

D. laminar

E. unsteady

3000. Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be ___________________?
0

A. 8000 kg

B. 4000 kg

C. 16000 kg

D. 1000 kg

E. 2000 kg

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