fluctuation of energy
maximum fluctuation of energy
coefficient of fluctuation of energy
none of these
✅ The correct answer is option A.
Theory of machines MCQs
342. Creep in belt drive is due to
weak material of the belt
weak material of the pulley
uneven extensions and contractions of the belt when it passes from tight side to slack side
expansion of the belt
✅ The correct answer is option C.
343. The stress induced in a body will be shear stress, when it is subjected to
longitudinal vibrations
transverse vibrations
torsional vibrations
none of these
✅ The correct answer is option C.
344. The equation of free vibrations of a system is , Its natural frequency is
3 Hz
3π Hz
6 Hz
6π Hz
✅ The correct answer is option A.
345. The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)
μ W R cosec α
μ W R cosec α
μ W R cosec α
μ W R cosec α
✅ The correct answer is option B.
346. Torsional vibrations are said to occur when the particles of a body moves
perpendicular to its axis
parallel to its axis
in a circle about its axis
none of these
✅ The correct answer is option C.
347. The equation of motion for a single degree of freedom system with viscous damping is . The damping ratio of the system is
9-Aug
Sep-82
Sep-16
9/128
✅ The correct answer is option C.
348. The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be
to dip the nose and tail
to raise the nose and tail
to raise the nose and dip the tail
to dip the nose and ra
✅ The correct answer is option C.
349. The flank of the tooth is the surface of the tooth __________ the pitch surface.
above
below
✅ The correct answer is option B.
350. The maximum displacement of a body, from its mean position is called amplitude.
TRUE
FALSE
✅ The correct answer is option A.