1. For a kinematic chain to be considered as mechanism
two links should be fixed
one link should be fixed
none of the links should be fixed
there is no such criterion
none of the above.
Correct answer: (B) one link should be fixed
2. typewriter mechanism has 7 number of binary joints, six links and none of higher pairs. The mechanism is
kinematically sound
not sound
soundness would depend upon which link is kept fixed
data is not sufficient to determine same
none of the above.
Correct answer: (A) kinematically sound
3. “Open pairs are those which have
point or line contact between the two elements when in motion
surface contact between the two ele-ments when in motion
elements of pairs not held together mechanically
two elements that permit relative motion
none of the above.
Correct answer: (C) elements of pairs not held together mechanically
4. A body having moment of inertia o:m2 is rotating at 210 RPM and r with another body at rest having I 40 kg m2. The resultant speed after ing will be
90 RPM
100 RPM
80 RPM
data are insufficient
none of the above.
Correct answer: (A) 90 RPM
5. A cam mechanism imparts following motion
rotating
oscillating
reciprocating
all of the above
none of the above.
Correct answer: (D) all of the above
6. A cam with a roller follower would con stitute following type of pair
lower pair
higher pair
open pair
close pair
cam pair.
Correct answer: (B) higher pair
7. A chain comprises of 5 links having 5 joints. Is it kinematic chain?
yes
no
it is a marginal case
data are insufficient to determine it
unpredictable.
Correct answer: (B) no
8. A circle passing through the pitch point with its center at the center of cam axis is known as
pitch circle
base circle
prime circle
outer circle
cam circle.
Correct answer: (C) prime circle
9. A circular bar moving in a round hole is an example of