Mechanical Engineering - Theory of Machines - Cam and Gear

Buy GATE - Mechanical Engineering Practice test pack

Question - 1

The size of a cam depends upon

  • A base circle
  • B pitch circle
  • C pitch curve
  • D prime circle

Question - 2

A circle drawn with centre as the cam centre and radius equal to the distance between the cam centre and the point on the pitch curve at which the pressure angle is maximum, is called

  • A prime circle
  • B pitch circle
  • C base circle
  • D None of these

Question - 3

Offet is provided to cam follower mechanism to

  • A minimise the side thrust
  • B avoid jerk
  • C accelerate
  • D None of these

Question - 4

The angle between the direction of the follower motion and a normal to the pitch curve is called

  • A pitch angle
  • B prime angle
  • C pressure angle
  • D base angle

Question - 5

An imaginary circle which by pure rolling action, gives the same motion as the actual gear is called

  • A addendum circle
  • B pitch circle
  • C clearance circle
  • D dedendum circle

Question - 6

In a gear train, when the axes of the shafts over which the gears are mounted, move relative to a fixed axis, is called

  • A simple gear train
  • B epicyclic gear train
  • C reverted gear train
  • D compound gear train

Question - 7

In a simple gear train, if the number of idle gears is odd, then the motion of driven gear will

  • A be same as that of driving gear
  • B be opposite as that of driving gear
  • C depend upon profile of teeth
  • D None of the above

Question - 8

Consider a cam profile in which the follower moves with uniform acceleration and deceleration. During returning acceleration is half the deceleration.
If angle of descent = 120°, then angle of acceleration and deceleration is

  • A 40°, 60°
  • B 40°, 80°
  • C 0°, 120°
  • D 60°, 60°

Question - 9

Consider a cam profile in which the follower moves with uniform acceleration and deceleration. During returning acceleration is half the deceleration.
If angle of ascent is 100°, then angle of dwell is

  • A 100°
  • B 200°
  • C 140°
  • D 150°

Question - 10

Consider a cam rotating with uniform angular velocity 50 rad/s. Follower also moves with uniform velocity. Lift of follower is 100 mm.
If angle of ascent, descent and dwell all are same then angle of ascent is

  • A 90°
  • B 180°
  • C 60°
  • D 120°
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next
Previous Next