Which of the following are the beneficial effects of air vessel fitted to delivery side of a reciprocating pump?
1. Constant rate of discharge can be ensured.
2. Power consumption can be reduced.
3. Discharge can be increased.
4. Constant velocity of the piston can be ensured.
Select the correct answer using the codes given below:
a) 1 and 4 b) 1 and 2
c) 2 and 4 d) 1 and 3