Practice Test: Question Set - 18
1. The Coriolis component of acceleration acts
- (A) Along
the sliding surface
- (B) Perpendicular
to the sliding surface
- (C) At
45° to the sliding surface
- (D) Parallel
to the sliding surface
2. When a slider moves on a fixed link having curved surface, their instantaneous centre lies
- (A) On
their point of contact
- (B) At
the centre of curvature
- (C) At
the centre of circle
- (D) At
the pin joint
3. A kinematic chain requires at least
- (A) 2
links and 3 turning pairs
- (B) 3
links and 4 turning pairs
- (C) 4
links and 4 turning pairs
- (D) 5
links and 4 turning pairs
4. The maximum value of the pressure angle in case of cam is kept as
- (A) 10°
- (B) 14°
- (C) 20°
- (D) 30°
5. In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done
- (A) Because
of difficulty in manufacturing cam profile
- (B) Because
of loose contact of follower with cam surface
- (C) In order to
have acceleration in beginning and retardation at the end of stroke within the
finite limits
- (D) Because
the uniform velocity motion is a partial parabolic motion
6. In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be
- (A) n₁ + n₂
- (B) n₁ + n₂
+ 1
- (C) n₁ + n₂
- 1
- (D) n₁ + n₂
- 2
7. The unbalanced force due to reciprocating masses
- (A) Varies
in magnitude but constant in direction
- (B) Varies
in direction but constant in magnitude
- (C) Varies
in magnitude and direction both
- (D) Constant
in magnitude and direction both
8. The motion between a pair when limited to a definite direction, irrespective of the direction of force applied, is known as
- (A) Completely
constrained motion
- (B) Incompletely
constrained motion
- (C) Successfully
constrained motion
- (D) None of
these
9. The mechanism forms a structure, when the number of degrees of freedom (n) is equal to
- (A) 0
- (B) 1
- (C) 2
- (D) -1
10. Kinematic pairs are those which have two elements that
- (A) Have
line contact
- (B) Have
surface contact
- (C) Permit
relative motion
- (D) Are
held together
11. A cam mechanism imparts following motion
- (A) Rotating
- (B) Oscillating
- (C) Reciprocating
- (D) All
of the above
12. Coriolis component is encountered in
- (A) Quick
return mechanism of shaper
- (B) Four
bar chain mechanism
- (C) Slider
crank mechanism
- (D) Both (A) and (C) above
13. Which of the following is a lower pair?
- (A) Ball and socket i
- (B) Piston
and cylinder
- (C) Cam
and follower
- (D) Both (A) and (B) above
14. Davis steering gear consists of
- (A) Sliding
pairs
- (B) Turning pairs
- (C) Rolling pairs
- (D) Higher pairs
15. Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of an open belt drive. The length of the belt is
- (A) π (r₁ + r₂) + (r₁ + r₂)²/x + 2x
- (B) π (r₁ + r₂) + (r₁ - r₂)²/x + 2x
- (C) π (r₁ - r₂) + (r₁ - r₂)²/x + 2x
- (D) π (r₁ - r₂) + (r₁ + r₂)²/x + 2x
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