Theory of Machines MCQ with Answers

61) Single slider crank chain consists of

Answer is:

One sliding pair and three turning pairs

Explanation:

Single slider crank chain is a modification of the four bar chain. Single slider crank chain consists of one sliding pair and three turning pairs. It is, usually, found in reciprocating steam engine mechanism. This type of mechanism converts rotary motion into reciprocating motion. The inversions of a single slider crank chain are found in the following mechanisms.
* Pendulum pump or Bull engine
* Oscillating cylinder engine
* Rotary internal combustion engine or Gnome engine.
* Crank and slotted lever quick return motion mechanism.
* Whitworth quick return motion mechanism.

62) On which circle or curve the size of the cam depends ?

Answer is:

Base circle

63) The component which functions opposite of brake is ______

Answer is:

Clutch

64) Brakes use friction to convert

Answer is:

Kinetic energy into heat

65) If a brake heats, it may become less effective, called

Answer is:

Brake fade

Explanation:

Brake fade results from excessive heat causing chemical changes in the brake lining, which reduce friction, and also causing expansion of the brake drums.