Theory of Machines Practice Exams - Set 16

Practice Test: Question Set - 16

1. The centre of gravity of a coupler link in a four bar mechanism will experience
    (A) No acceleration
    (B) Only linear acceleration
    (C) Only angular acceleration
    (D) Both linear and angular acceleration

2. The moment on the pulley which produces rotation is called
    (A) Inertia
    (B) Momentum
    (C) Moment of momentum
    (D) Torque

3. An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has
    (A) 2 links
    (B) 3 links
    (C) 4 links
    (D) 5 links

4. Tangential acceleration direction is
    (A) Along the angular velocity
    (B) Opposite to angular velocity
    (C) May be any one of these
    (D) Perpendicular to angular velocity

5. If the pressure angle is __________, a reciprocating follower will jam in its bearings.
    (A) Small
    (B) Too small
    (C) Large
    (D) Too large

6. Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
    (A) Slow speed
    (B) Moderate speed
    (C) Highs peed
    (D) Any one of these

7. If the number of links in a mechanism is equal to l, then the numbers of possible inversions are equal to
    (A) l - 2
    (B) l - 1
    (C) l
    (D) l + 1

8. The brake commonly used in railway trains is
    (A) Shoe brake
    (B) Band brake
    (C) Band and block brake
    (D) Internal expanding brake

9. The example of lower pair is
    (A) Shaft revolving in a bearing
    (B) Straight line motion mechanisms
    (C) Automobile steering gear
    (D) All of the above

10. Which of the following has sliding motion?
    (A) Crank
    (B) Connecting rod
    (C) Crank pin
    (D) Cross-head

11. The component of the acceleration, perpendicular to the velocity of the particle, at the given instant is called
    (A) Radial component
    (B) Tangential component
    (C) Coriolis component
    (D) None of these

12. In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then
    (A) Open belt drive is recommended
    (B) Crossed belt drive is recommended
    (C) Both open belt drive and crossed belt drive is recommended
    (D) The drive is recommended depending upon the torque transmitted

13. A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force
    (A) The reaction on me inner wheels increases and on the outer wheels decreases
    (B) The reaction on the outer wheels increases and on the inner wheels decreases
    (C) The reaction on the front wheels increases and on the rear wheels decreases
    (D) The reaction on the rear wheels increases and on the front wheels decreases

14. The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is
    (A) Flexible coupling
    (B) Universal coupling
    (C) Chain coupling
    (D) Oldham's coupling

15. For fluctuating loads, well suited bearing is
    (A) Ball bearing
    (B) Roller bearing
    (C) Needle roller bearing
    (D) Thrust bearing

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Theory of Machines:
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