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UPSC Civil Service Exam Questions - Engineering

Q1:

Consider the following statements :
1. Butterfly valve is used for throttling and controlling flow rate.
2. Check valve is used in the discharge piping of a pump.
3. Air-relief valve is placed in the pipeline at the valleys to automatically vent the accumulated air in the system
4. Altitude valve is provided in user overhead tank.
Which of the statements given above are correct ?

A 1, 2 and 4 only

B 1, 2 and 3 only

C 1 and 2 only

D 3 and 4 only

ANS:C - 1 and 2 only

The correct order is;

1. Butterfly vale used for controlled flow, not for continuous flow.
2. Check the valve used to check backflow.
3. Air relief valve provided at summit point.
4. Located at a lower surface level but supplies water to the overhead tank.