A. P
B. PV2
C. P/V2
D. 2P
✅ The correct answer is option B.
Civil Engineering
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92. If y is force and x is velocity, then dimensions of —=r are dx2__________________?
A. M’^T’
B. M’L-‘T0
C. M’L-‘T1
D. M2L’T3
✅ The correct answer is option B.
93. The unit of rotational inertia of a body in C.G.S system is________________?
A. cm4
B. kg-cm2
C. gm-cm2
D. gm-cm3
✅ The correct answer is option C.
94. The ratio of unit of force in gravitational system to that in absolute system is__________________?
A. 1
B. g
C. 1/g
D. none of the above
✅ The correct answer is option B.
95. One Joule is equivalent to________________?
A. 9.81 Newton – metre
B. 1 Newton – metre
C. 1 kg wt – metre
D. 1 dyne – metre
✅ The correct answer is option B.
96. A disc of mass 4 kg, radius 0.5m and moment of inertia 3 kg-m2 rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is ___________________?
A. 50 J
B. 150 J
C. 200 J
D. 400 J
✅ The correct answer is option C.
97. A quantity whose dimensions are M2L2 T3 could be the product of_________________?
A. force and pressure
B. mass and power
C. energy and velocity
D. force and velocity
✅ The correct answer is option B.
98. In SI units, the units of force and energy are respectively___________________?
A. Newton and watt
B. Dyne and erg
C. Newton and joule
D. kg-wt and joule
✅ The correct answer is option C.
99. The following is in unstable equilibrium__________________?
A. a uniform solid cone resting on a generator on a smooth horizontal plane
B. a uniform solid cone resting on its base on a horizontal plane
C. a solid cube resting on one edge
D. a satellite encircling the earth
✅ The correct answer is option C.
100. A ladder of weight ‘w’ rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight ‘w’ is to walk to the top of it safely, is tan’1 x, where x is___________________?
A. 1/4
B. 1/3
C. 3
D. 4
✅ The correct answer is option B.