Boiler Operation Engineer Previous year Questions With Answer Set - 36
1. What is the purpose of guard glass in a glass-tube water level indicator?
a) It protects the attendant, if water starts leaking
b) It protects the water gauge, if steam pressure increases the design pressure
c) It protects the attendant, if boiler cracks
d) It protects the attendant, if the gauge glass breaks
Ans. d
2. What is the purpose of pressure gauge?
a) It measures the pressure exerted on the boiler shell from outside
b) It measure the current atmospheric pressure
c) It measures pressure exerted inside the boiler shell
d) It measures hydrostatic pressure of water at the bottom of the boiler shell
Ans. c
3. Which of the following statements about compound pressure gauge is TRUE?
a) It measure the hydrostatic pressure exerted by water at the bottom surface
b) It can measure pressures above and below atmospheric pressure on the same dial
c) It is installed at the bottom of the boiler shell
d) It measures absolute pressure
Ans. b
4. The syphon tube in the Bourdon pressure gauge (single tube) is filled with _____
a) mercury
b) turpentine oil
c) mineral water
d) condensed water
Ans. d
5. 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
6. 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. c
7. Feed check valve is used to empty the boiler when it is required to be cleaned.
a) True
b) False
Ans. b
8. 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
9. 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
10. Which of the following is NOT a boiler mounting?
a) Steam stop valve
b) Man hole
c) Economizer
d) Pressure gauge
Ans. c
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