Boiler Operation Engineer Previous year Questions With Answer Set - 20
1.What is the purpose of Deaerator ?
a) to remove the dissolved oxygen and carbon dioxide
b) to remove the dissolved nitrogen
c) to remove the dissolved impurities
d) to supply more oxygen to feedwater
Ans. a
2.How dissolved oxygen and carbon dioxides are removed ?
a) by allowing it to fall from height
b) by series of chemical reactions
c) by condensing feedwater
d) by heating feedwater to saturation temperature
Ans. d
3.What chemicals are added for residual dissolved oxygen and carbon dioxide ?
a) sodium sulphite
b) hydrazine
c) alum
d) all of the mentioned
Ans. d
4.What do you mean by vent condenser ?
a) a condensing unit
b) a temperature measuring instrument
c) a heat exchanger
d) dissolves oxygen
Ans. c
5.Why deaerator is installed at a certain height from the pump ?
a) to provide a net positive suction head
b) to maintain less pressure
c) to avoid leakage
d) to maintain pressure
Ans. a
6.Why deaerator is not used in water cooled and moderated nuclear power plant ?
a) radioactivity
b) not economical
c) not safe
d) not mechanically possible
Ans. a
10.Deaerator is an ___________
a) closed heater
b) open heater
c) surface heater
d) none of the mentioned
Ans. b
Boiler Objectives Questions :
Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -1
Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -2
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Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -7
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Boiler Operation Engineer (BOE) Previous Year Exam Questions And Answers Set - 19
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