When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by

A. μ₁ = μsinβ

B. μ₁ = μcosβ

C. $${\mu _1} = \frac{\mu }{{\sin \beta }}$$

D. $${\mu _1} = \frac{\mu }{{\cos \beta }}$$

The lower pairs are _________ pairs.

A. Self-closed

B. Force-closed

C. Friction closed

D. None of these

In a coupling rod of a locomotive, each of the four pairs is a ________ pair.

A. Sliding

B. Turning

C. Rolling

D. Screw

A kinematic chain is known as a mechanism when

A. None of the links is fixed

B. One of the links is fixed

C. Two of the links are fixed

D. None of these