civil engineering MCQs – Page 293

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 Review each marked answer and report any item that may be outdated or unclear.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
5841. Stream lines and path lines always coincide in case of__________________?
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A. steady flow

B. uniform flow

C. laminar flow

D. turbulent flow

5842. Which of the following velocity potentials satisfies continuity equation ?
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A. x2y

B. cosx

C. x2-y2

D. x2 + y2

5843. The wake_______________?
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A. is a region of high pressure intensity

B. always occurs before a separation point

C. none of the above

D. always occurs after a separation point
5844. A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be__________________?
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A. 2 m/sec

B. 1.5 m/sec

C. 1 m/sec

D. less than 1 m/sec

5845. For laminar flow in a pipe of circular cross-section, the Darcys friction factor f is________________?
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A. directly proportional to Reynolds number and independent of pipe wall roughness

B. inversely proportional to Reynolds number and directly proportional to pipe wall roughness

C. directly proportional to pipe wall roughness and independent of Reynolds number

D. inversely proportional to Reynolds number and indpendent of pipe wall roughness
5846. Coefficient of velocity for Bordas mouth piece running full is________________?
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A. 0.855

B. 1

C. 0.707

D. 0.611

5847. The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to_______________?
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A. PA

B. pA cos 9

C. pA sin 9

D. pA tan 9

5848. When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wavE., the portion of pipe length subjected to maximum head is__________________?
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A. L/2

B. L/4

C. L

D. L/3

5849. The discharge through a V- notch varies as______________?
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A. H5/2

B. H54 where H is head

C. H1/2

D. H32

5850. The velocity distribution for laminar flow through a circular tube__________________?
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A. varies linearly from zero at walls to maximum at centre

B. is constant over the cross-section

C. varies parabolically with maximum at the centre

D. none of the above

5851. Ay between two stream lines represents________________?
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A. discharge

B. velocity

C. pressure

D. head

5852. The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called____________________?
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A. Active remote sensing

B. None of these

C. Passive remote sensing

D. Neutral remote sensing

5853. The refractive index of the ocean water_______________?
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A. Decreases with salinity

B. Increases with temperature

C. Decreases with temperature

D. Increases with salinity
5854. An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media. This phenomenon is known as___________________?
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A. Fresnel refraction

B. Fresnel reflection

C. None of these

D. Snells law

5855. While propagating through homogeneous, isotropic media_________________?
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A. Directions of both the fields are orthogonal

B. Both the fields are at right angles to the direction of propagation

C. Both A. and B.

D. Neither A. nor B.

5856. Due to scan geometry of a satellite sensor____________________?
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A. All of these

B. The off-nadir resolution is degraded

C. The ground distance swept by the senor, IFOV is proportional to sec2 of scan measured from the nadir

D. The details towards the edge of the scan get compressed

5857. Pick up the correct statement from the following?
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A. All of these

B. The wave whose surface of constant phase are parallel planes, is known as a plane wave

C. The relative phase difference between the waves is important and not the absolute phase of a point on the wave

D. The surface defined by the locus of points having same phase, is called a wave front

5858. Pick up the correct definition from the following with response to GIS_______________?
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A. All of these

B. The area features which are wholly contained within another area feature, is known so containment

C. Common boundary between two areas of a locality is known as adjacency

D. The geometric property which describes the linkage between line features is defined as connectivity

5859. The optical property of a water body depends on ?
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A. Scattering by the suspended particulate matter

B. Absorption by the dissolved material

C. Absorption by the suspended particulate matter

D. All of these
5860. Which one of the following factors does not affect the scale of the air photographs ?
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A. Focal length

B. Ground elevation

C. None of these

D. Flying height