31. When two non-intersecting and non-coplaner shafts are connected by gears, the arrangement is known as helical gearing.
Right
Wrong
✅ The correct answer is option B.
Theory of machines MCQs
32. When a slider moves on a fixed link having curved surface, their instantaneous centre lies
on their point of contact
at the centre of curvature
at the centre of circle
at the pin joint
✅ The correct answer is option B.
33. When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
lower pair
higher pair
self-closed pair
force-closed pair
✅ The correct answer is option D.
34. The frictional torque transmitted by a disc or plate clutch is same as that of
flat pivot bearing
flat collar bearing
conical pivot bearing
truncated conical pivo
✅ The correct answer is option B.
35. The power transmitted by a belt is maximum when the maximum tension in the belt is __________ of centrifugal tension.
one-third
two-third
double
three times
✅ The correct answer is option D.
36. In a gear having involute teeth, the normal to the involute is a tangent to the
pitch circle
base circle
addendum circle
dedendum circle
✅ The correct answer is option B.
37. The velocity of a body moving with simple harmonic motion is __________ at the mean position.
zero
minimum
maximum
✅ The correct answer is option C.
38. The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.
sum
difference
product
ratio
✅ The correct answer is option D.
39. When a mechanism is required to transmit power or to do some particular type of work, then it becomes a machine.
Agree
Disagree
✅ The correct answer is option A.
40. The ball and socket joint is an example of screw pair.
Agree
Disagree
✅ The correct answer is option B.