Practice Test: Question Set - 09

1. In a rigid link OA, velocity of ‘A’ w.r.t. ‘O’ will be
(A) Parallel to OA
(B) Perpendicular to OA
(C) At 45° to OA
(D) Along AO

2. Cylindrical cams can be classified as
(A) Circular
(B) Tangent
(C) Reciprocating
(D) None of the above

3. Rectangular bar in a rectangular hole is the following type of pair
(A) Completely constrained motion
(B) Partially constrained motion
(C) Incompletely constrained motion
(D) Freely constrained motion

4. Which of the following statement is correct?
(A) The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation.
(B) The periodic time of a particle moving with simple harmonic motion is directly proportional to its angular velocity.
(C) The velocity of a particle moving with simple harmonic motion is zero at the mean position.
(D) The acceleration of the particle moving with simple harmonic motion is maximum at the mean position.

5. In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to
(A) 0.2
(B) 0.4
(C) 0.6
(D) 0.8

6. The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in
(A) A single plane
(B) Two planes
(C) Three planes
(D) Four planes

7. A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a
(A) Structure
(B) Mechanism
(C) Kinematic chain
(D) Inversion

8. V-belts are usually used for
(A) Long drives
(B) Short drives
(C) Long and short drives
(D) None of these

9. When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a
(A) D-slide valve
(B) Governor
(C) Meyer's expansion valve
(D) Flywheel

10. To obviate axial thrust, following gear drive is used
(A) Double helical gears having opposite teeth
(B) Double helical gears having identical teeth
(C) Single helical gear in which one of the teeth of helix angle a is more
(D) Mutter gears

11. The direction of Coriolis component of acceleration is the direction
(A) Of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link
(B) Along the centripetal acceleration
(C) Along tangential acceleration
(D) Along perpendicular to angular velocity

12. The maximum velocity of a particle moving with simple harmonic motion is
(A) ω
(B) ωr
(C) ω²r
(D) ω/r

13. The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because
(A) Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels
(B) The Ackerman steering gear consists of turning pairs
(C) The Ackerman steering gear is most economical
(D) Both (A) and (B)

14. The advantage of the piston valve over the slide valve is that in the former case
(A) Wear is less
(B) Power absorbed is less
(C) Both wear and power absorbed are low
(D) The pressure developed being high provides tight sealing

15. The Bifilar suspension method is used to determine
(A) Natural frequency of vibration
(B) Position of balancing weights
(C) Moment of inertia
(D) Centripetal acceleration

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