A panto graph is a mechanism with___________________?
(A) lower pairs
(B) higher pairs
(C) rolling pairs
(D) turning pairs
(D) spherical pairs
Lower pairs are those which have___________________?
(A) point or line contact between the two elements when in motion
(B) surface contact between the two elements when in motion
(C) elements of pairs not -held together mechanically
(D) two elements that permit relative motion
(D) none of the above
The number of links and instantaneous centers in a reciprocating engine mechanism are ___________________?
(A) 4, 4
(B) 4, 5
(C) 5, 4
(D) 6, 4
(D) 4, 6
Which is the false statement about the properties of instantaneous center____________________?
(A) at the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
(B) the two rigid links have no linear velocities relative to each other at the instantaneous centre
(C) the two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
(D) the double centre can be denoted either by 02 or Ol2, but proper selection should be made
(D) none of the above
If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be_______________?
(A) less
(B) more
(C) same
(D) data are insufficient to determine same
(D) none of the above
The frequency of oscillation at compared to earth will be___________________?
(A) 6 times more
(B) 6 times less
(C) 2.44 times more
(D) 2.44 times,less
(D) 36 times less
For simple harmonic motion of the of follower, a cosine curve represents___________________?
(A) displacement diagram
(B) velocity diagram
(C) acceleration diagram
(D) all of the above
(D) none of the above
In above example, the minimum length of the coupler will be__________________?
(A) 45 mm
(B) slightly less than 45 mm
(C) slightly more than 45 mm
(D) 95 mm
(D) none of the above
A typewriter mechanism has 7 number of binary joints, six links and none of higher pairs. The mechanism is________________?
(A) kinematically sound
(B) not sound
(C) soundness would depend upon which link is kept fixed
(D) data is not sufficient to determine same
(D) none of the above
The following is the inversion of slider crank chain mechanism______________________?
(A) Whitworth quick return mechanism
(B) hand pump
(C) oscillating cylinder engine
(D) all of the above
(D) none of the above