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BOE Exam ( Boiler Operation Engineer ) Solved Papers Set - 21

Boiler Operation Engineer (BOE) Previous Year Questions With Answer - 21

1. What is the solubility of dissolved gases at boiling or saturation temperature?

a) Positive

b) Negative

c) Zero

d) None of the mentioned

Ans. c


2. In the deaerator, the feedwater is heated to the saturation temperature by the steam extracted from?

a) compressor

b) turbine

c) pump

d) none of the mentioned

Ans. b


3. Which of the following type heater is known as deaerator?

a) Contact-type open heater

b) Contact-type closed heater

c) Closed heater

d) None of the mentioned

Ans. a


4. Where is the deaerator placed in the feedwater system?

a) in the beginning

b) in the middle

c) at the end

d) there is no deaerator in the feedwater system

Ans. b


5. Which among the following goes to the Vent Condenser along with Oxygen & Carbon dioxide?

a) Sodium sulphite

b) Carbon monoxide

c) Water vapour

d) None of the mentioned

Ans. c


6. Why is the deaerator not employed in water cooled & moderated nuclear power plant?

a) due to radioactivity release in degeneration

b) due to emissivity of degeneration

c) due to reheating

d) due to regeneration

Ans. a


7. Net positive suction head(NPSH) is provided because?

a) to prevent vapour lock

b) to prevent cavitation

c) to prevent friction

d) none of the mentioned

Ans. b


8. Which gases are vented out of the deaerator?

a) Oxygen only

b) Carbon dioxide only

c) Oxygen & Carbon dioxide

d) None of the mentioned

Ans. c


9. Why is the deaerator placement in the feedwater system so important?

a) to maximise pressure difference between the condenser & the boiler

b) to minimise pressure difference between the condenser & the boiler

c) to make the pressure difference between the condenser & the boiler Zero

d) none of the mentioned

Ans. c


10. Name another chemical apart from Sodium Sulphite which is into the feedwater at the suction of the boiler feed pump?

a) Calcium peroxide

b) Hydroxide

c) Hydrazine

d) Oxygen

Ans. c


11. The chemical injected into the feedwater at the suction of the boiler feed pump is?

a) Sodium Sulphide

b) Sodium Sulphate

c) Sodium Sulphite

d) Sodium Hydride

Ans. c


12. Why is Sodium Sulphite added into the feedwater at the suction of the boiler feed pump?

a) to maximise the effect of dissolved gases

b) to minimise the effect of dissolved gases

c) to increase feedwater concentration

d) none of the mentioned

Ans. b



13. The heat exchanger after passing through which, the feedwater is sprayed from the top is called?

a) Vent condenser

b) Vent evaporator

c) Vent economiser

d) Vent heater

Ans. a


Boiler Objectives Questions :

Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -2

Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -3

Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -4 

Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -5

Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -6

Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -7

BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 8

BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 9

BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 10

BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 11

BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 12

BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 13

BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 14

BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 18

Boiler Operation Engineer (BOE) Previous Year Exam Questions And Answers Set - 19

Boiler Operation (BOE) Previous Year Multiple Choice Questions With Answer Set - 20

Read More Boiler Interview Questions  

What are the factors which affect the Natural circulation ?

What is the difference between Tower type and Two pass conventional boiler?

What parameters are measured during Boiler PG test ?

Why the start up vent is used in Boilers?

List out the potential reasons for boiler tubes failure ? 

What is cold end corrosion in boiler and When it occurs ?

What is the circulation number in boiler ?

Most Important Steam Blowing Questions Asked In Central BOE Interview 

How it is been decided that RHS or LHS safety valve of steam drum is set at higher pressure ?

Why economiser is kept at the top of the boiler ?

How do you identify the leakage of economiser tube 

Can the blades of FD fan be replaced by the ID fan blades?

Why do high pressure Boilers have higher efficiency 

How do you reduce the auxiliary power consumption of Boiler ?

What are the salts present in the raw water ? 

What are the reasons for lifting of steam drum safety valve ? 

Possible reasons for higher main steam temperature ?

What are the causes of higher flue gas outlet temperature of boiler ?

 How to Calculate Efficiency of a Power Plant ?

How do you calculate the Turbine Efficiency ?

Power Plant Objectives Questions 

Previous Year Power Plant Questions and Answers – Rankine Cycle

Power Plant Questions and Answers – Feedwater Heaters

To See Power Plant Interview Related youtube Videos Click Below Link 

Click here




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