MCQ on velocity of mechanism

1.The total number of instantaneous centres for a mechanism consisting of n links are
(a)n / 2
(b) n
(c)(n-1) / 2
(d) n (n - 1) /2

2. According to Aronhold Kennedy’s theorem, if three bodies move relatively to each other, their
instantaneous centres will lie on a
(a) straight line (b) parabolic curve
(c) ellipse.          (d) none of these

3. In a mechanism, the fixed instantaneous centres are those centres which
(a) remain in the same place for all configurations of the mechanism
(b) vary with the configuration of the mechanism
(c) moves as the mechanism moves, but joints are of permanent nature
(d) none of the above

4. The instantaneous centres which vary with the configuration of the mechanism, are called
(a) permanent instantaneous centres
(b) fixed instantaneous centres
(c) neither fixed nor permanent instantaneous centres
(d) none of these

5. 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

ANSWERS
1. (d) 2. (a) 3. (a) 4. (c) 5. (b)