Theory of Machines MCQ with Answers

66) If the controlling force line for a spring controlled governor when produced intersects the Y-axis above the origin, then the governor is said to be unstable.

Answer is:

Right

67) The product of the diametral pitch and module is equal to one.

Answer is:

Correct

68) The inversion of a mechanism is

Answer is:

obtained by fixing different links in a kinematic chain

69) The coefficient of fluctuation of energy is the ratio of maximum energy to the minimum energy.

Answer is:

Wrong

70) When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a

Answer is:

sliding pair

Explanation:

Sliding Pair: When the two elements of a pair are connected in such a way that one can only slide relative to the other, the pair is known as a sliding pair. The piston and cylinder, cross-head and guides of a reciprocating steam engine, ram and its guides in shaper, tailstock on the lathe bed etc. are examples of a sliding pair. A little consideration will show, that a sliding pair has a completely constrained motion.