Consider the following statements regarding air vessels provided in, reciprocating pump installations
1. The air vessels are fitted both on suction and delivery sides.
2. The air vessels are fitted far from the pump cylinder.
3. The air vessels save energy by reducing the friction loss.
Which of these statements are correct?
a. 1, 2 and 3 b. 2 and 3
c. 1 and 2 d. 1 and 3