500 Best Applied Mechanics MCQ
Q65). To avoid bending action at the base of a pier,
a).suspension and anchor cables are kept at the same level
b).suspension and anchor cables are fixed to pier top
c).suspension cable and anchor cables are attached to a saddle mounted on rollers on top of the pier
d).none the these.
Correct Answer:
suspension and anchor cables are fixed to pier top
Explanation:
Q66). For a body moving with simple harmonic motion, the number of cycles per second, is known as its
a).oscillation
b).amplitude
c).periodic time
d).frequency
Correct Answer:
frequency
Explanation:
Q67). If the horizontal range is 2.5 times the greatest height, the angle of projection of the projectile, is
a).57°
b).58°
c).59°
d).60°.
Correct Answer:
58°
Explanation:
Q68). The shape of a suspended cable under its own weight, is
a).parabolic
b).circular
c).catenary
d).elliptical.
Correct Answer:
catenary
Explanation:
Q69). Time required to stop a car moving with a velocity 20 m/sec within a distance of 40 m, is
a).2 sec
b).3 sec
c).4 sec
d).5 sec
Correct Answer:
4 sec
Explanation:
Q70). The characteristic of a couple, is :
a).algebraic sum of forces, constituting a couple is zero
b).algebraic sum of moments of forces, constituting a couple, about any poin, is same
c).a couple can be balanced only by a couple but of opposite sense
d).all the above.
Correct Answer:
all the above.
Explanation:
Q71). Ball A of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/s hits an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after impact would be
a).zero
b).5 m/sec
c).10 m/sec
d).none of these.
Correct Answer:
10 m/sec
Explanation:
Q72). One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The tension in the string is
a).17.5 kg
b).19.5 kg
c).22.5 kg
d).25 kg.
Correct Answer:
22.5 kg
Explanation: