question_answer

Consider the following statements regarding torque converter:

1. It has a stationary set of blades in addition to the primary and secondary rotors.

2. It can be used for multiplication of torques.

3. The maximum efficiency of a inverter is less than that of a fluid coupling

4. In a converter designed to give a large increase of torque, the efficiency........speed ratio approaches unity.

Of these statements:

A) 1, 2, 3 and 4 are correct

B) 1, 2 and 3 are correct

C) 1, 2 and 4 are correct

D) 3 and 4 are correct