Top 350+ Solved Applied Mechanics MCQ Questions Answer
Q. A imaginary planet has half the mass and half the radius of the earth. The acceleration of gravity at its surface would be
a. 9.8 m/s2
b. 107 dynes
c. 4.9 m/s2
d. 19.6 m/s2
e. 2.45 m/s2
Q. The principle of conservation of energy cannot be applied in case of
a. Flow of heat through a metal
b. Ideal flow of water in a pipe
c. Simple pendulum
d. Sliding of a particle along inclined plane with friction
e. A particle moving in gravitational field
Q. A truss element
a. 107 dynes
b. resists lateral forces
c. is a two-force body
d. is a three force body
e. resist forces in compression only
Q. Impulse can be obtained from
a. force-time diagram
b. velocity-time diagram
c. 107 dynes
d. force displacement diagram
e. velocity-displacement diagram
Q. A mass of 5 kg moves on a smooth horizontal plane with a speed of 8 m/s attached to a fixed point on the plane by a string of length 4m. Tension in the string is
a. 785
b. 80N
c. 392.4N
d. None of the above
e. Tapered bearing
Q. The area under stress-strain curve represents
a. Hardness of material
b. Breaking strength of the material
c. Energy required to cause failure
d. Toughness of material
e. Malleabbility of material
Q. A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have
a. angular velocity
b. centripental acceleration
c. tangential acceleration
d. all of the above
e. 107 dynes
Q. A block of weight 20 kg slides with an initial velocity of 2 m sec down an inclined plane on to a spring of stiffness 10 kg/cm. If the co--efficient of friction is 0.2, angle ? = 30 the ratio of maximum compession of spring, neglecting friction to that while considering friction would be
a. More than one
b. One
c. Less than one
d. Depends on the stiffness of spring
e. None of the above
Q. A jet engine works on the principle of
a. Conservation of energy
b. Conservation of mass and momentum
c. Conservation of linear mementum
d. Conservation of energy and momentum
e. Conservation of mass
Q. The angular velocity of seconds hand of a watch is
a. 0.01745 sec-1
b. 0.00001745 sec-1
c. 0.0001745 sec-1
d. 0.001745 sec-1
e. 0.1047 sec-1
Q. A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is
a. Proportional to the coefficient of static friction
b. Proportional to the coefficient of dynamic friction
c. Indeterminate
d. Determinate but depends on the acceleration of the cylinder
e. None of the above
Q. The statement ---- if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two ---- is known as
a. Law of polygon of forces
b. D'Alembert's principle
c. Newtons law of forces
d. Lami's theorem
e. Law of triangle of forces
Q. A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is
a. ar2 / (R2 - r2)
b. 107 dynes
c. aR/(R2-r2)
d. aR/(R - r)
e. ar3 / (R3 - r3)