civil engineering MCQs – Page 164

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 Review each marked answer and report any item that may be outdated or unclear.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
3261. The dimensions of centrifugal force are__________________?
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A. MLT1

B. ML-T2

C. M1 L2 T2

D. MLT2
3262. A stone is thrown vertically upwards with a vertical velocity of 49 m/sec. It returns to the ground in________________?
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A. 5 sec

B. 10 sec

C. 20 sec

D. 8 sec

3263. When a body slides down an inclined surface, the acceleration of the body is given by__________________?
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A. gsinG

B. g tan 6

C. g

D. g cos 6

3264. The number of funicular polygons which can be drawn to pass through two specified points in the space diagram are__________________?
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A. 1

B. infinity

C. 2

D. zero

3265. The angular speed of a car taking a circular turn of radius 100 m at 36 km/hr will be___________________?
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A. 100 rad/sec

B. 1 rad/sec

C. 10 rad/sec

D. 0.1 rad/sec
3266. For a non-concurrent force system to be in equilibrium__________________?
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A. only the closure of force polygon is sufficient

B. only the closure of funicular polygon is sufficient

C. both force polygon and funicular polygon must close

D. none of the above

3267. Cartesian form of the equation of catenary is_________________?
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A. y = c tan x/c

B. y = c sinh x/c

C. y = c cosh x/c

D. y = c sin1 x/c

3268. The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then_________________?
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A. Q = R

B. P = R

C. None of the above is correct

D. P = Q

3269. A 2 m long ladder rests against a wall and makes an angle of 30 with the horizontal floor. Where will be the instantaneous center of rotation when the ladder starts slipping ?
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A. 1.0 m above the floor

B. 1.732 m from the wall

C. 1.0 in from the wall

D. 1.732 m above the floor </strong>

E. correct answer is?

3270. In SI units, the units of force and energy are respectively___________________?
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A. kg-wt and joule

B. Newton and joule

C. Newton and watt

D. Dyne and erg

3271. Intrinisic equation of catenary is given by____________________?
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A. S = C sin cp

B. S = C cot <p

C. S = C tan q>

D. S = C cos cp

3272. A light rope is loaded with many equal weights at equal horizontal intervals. The points of suspension on the rope lie on a_____________________?
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A. catenary

B. cycloid

C. parabola

D. ellipse

3273. A system of copianar forces is in equilibrium when___________________?
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A. force polygon closes

B. funicular polygon closes

C. both force polygon and funicular polygon close

D. all the forces are concurrent

3274. If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is__________________?
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A. unpredictable

B. zero

C. minimum

D. maximum
3275. The angles between two forces to make their resultant a minimum and a maximum respectively are__________________?
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A. 90 and 180

B. 0 and 90

C. 180 and 0

D. 180 and 90

3276. The condition of equilibrium for any system of forces in a plane is____________________?
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A. that polygon of forces must close

B. that resultant couple must be zero

C. both (A) and (B)

D. none of the above

3277. The ratio of kinetic energy and potential energy of a simple harmonic oscillator, at a displacement equal to half its amplitude is given by__________________?
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A. 1:02

B. 3:1

C. 1:01

D. 2:01

3278. In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN. The velocity ratio of the machine is_____________________?
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A. 60

B. 80

C. 50

D. 30

3279. The following is in unstable equilibrium__________________?
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A. a solid cube resting on one edge

B. a uniform solid cone resting on its base on a horizontal plane

C. a uniform solid cone resting on a generator on a smooth horizontal plane

D. a satellite encircling the earth

3280. The pole distance is measured in___________________?
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A. time scale

B. distance scale

C. force scale

D. mass scale