Theory of Machines - Interview Questions | Exam2Win

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121. Open 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

E. none of the above.

Explanation:

122. A pantograph is a mechanism with

A. lower pairs

B. higher pairs

C. rolling pairs

D. turning pairs

E. spherical pairs.

Explanation:

123. A chain comprises of 5 links having 5 joints. Is it kinematic chain ?

A. yes

B. no

C. it is a marginal case

D. data are insufficient to determine it

E. unpredictable.

Explanation:

124. Which of the following mechanisms produces mathematically an exact straight line motion

A. Grasshopper mechanism

B. Watt mechanism

C. Peaucellier's mechanism

D. Tchabichiff mechanism

E. Ackermann mechanism.

Explanation:

125. For a kinematic chain to be considered as mechanism

A. two links should be fixed

B. one link should be fixed

C. none of the links should be fixed

D. there is no such criterion

E. none of the above.

Explanation: