Boiler Operation Engineer Question Set - 43
1. Feed check valve is used to empty the boiler when it is required to be cleaned.
a) True
b) False
Ans. b
2. Where is feed check valve mounted?
a) On top of the boiler shell
b) At the bottom of the boiler shell
c) Above the water level to be maintained
d) Slightly below the water level to be maintained
Ans. d
3. Which of the following statement about stop valve (or junction valve) is FALSE?
a) It regulates the flow of steam
b) Fitted at top of the boiler
c) It connects boiler with the steam pipe
d) The smaller sized valve is called junction valve
Ans. d
4. Which of the following is NOT a boiler mounting?
a) Steam stop valve
b) Man hole
c) Economiser
d) Pressure gauge
Ans. c
5. Which of the following statements about feed check valve is FALSE?
a) It controls the flow of water
b) It only allows flow of water in one direction
c) It is fitted on top of the boiler shell
d) It consists of check valve which automatically moves up and down under pressure of water
Ans. c
6. The part of the feed check valve which moves up and down automatically under the pressure of water on its gun metal seat is called _____
a) Check valve
b) Fusible plug
c) Flange
d) Safety valve
Ans. a
7. What is the function of fusible plug?
a) Protects the boiler from overheating
b) Prevents mixing of water and steam
c) Regulated the flow of steam outside boiler
d) It is opened to increase the flow of air for combustion
Ans. a
8. Which of the following statements about fusible plug is FALSE?
a) It extinguishes fire when water level is low
b) It protects the boiler from overheating
c) It should have a very high melting point
d) It needs to be renewed after a period of time
Ans. d
9. In fusible plug, the fusible metal is protected from fire by flange on the hollow gun metal plug.
a) True
b) False
Ans. a
10. Which of the following statements about blow-off cock is FALSE?
a) It is used to discharge the mud that has settled at the bottom
b) It is used to empty the boiler for cleaning
c) Scale and sediments are also removed when the blow-off cock is opened
d) It is used to fill the boiler with water
Ans. d
11. Which of the following statements about blow-off cock is FALSE?
a) It is used to discharge the mud that has settled at the bottom
b) It is used to empty the boiler for cleaning
c) Scale and sediments are also removed when the blow-off cock is opened
d) It is used to fill the boiler with water
Ans. d
12. In a fusible plug, the substance that melts when it comes in contact with the steam is called _____
a) Melt
b) Meting wax
c) Fusible metal
d) Fusible wax
Ans. c
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