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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