Steam Generators - MCQs with Answers

Steam Generators - MCQs with Answers

Q1. The boiler in which the tubes are surrounded by hot gases is called as

a. fire tube boiler
b. water tube boiler
c. both a. and b.
d. none of the above

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Q2. Comparing fire tube and water tube boilers, which boiler can produce comparatively higher pressure steam than another for the same capacity?

a. fire tube boiler
b. water tube boiler
c. both can produce steam at same pressure for the same capacity
d. none of the above

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Q3. What is the purpose of using economizer in the boiler?

a. to heat feedwater by utilizing heat from exhaust gases
b. to heat feedwater by utilizing some heat from superheated steam
c. to superheat steam
d. none of the above

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Q4. How is the natural draught produced for exhaust gases?

a. by using fan
b. by using chimney
c. by using gravity
d. none of the above

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Q5. The purpose of superheater in a boiler is

a. to increase the temperature of saturated steam with increase in its pressure
b. to increase the temperature of saturated steam without increase in its pressure
c. to increase the temperature of feedwater for better efficiency
d. none of the above

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Q6. The natural draught in the steam generator depends upon

a. the air condition outside the chimney
b. the temperature of exhaust gases
c. both a. and b.
d. none of the above

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Q7. Which device used to separate condensate from the steam without letting steam escape?

a. condenser
b. steam valve
c. steam trap
d. none of the above

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Q8. What is the disadvantage of natural draught?

a. it has less life
b. it has more maintenance cost of cleaning and more capital cost to build the chimney
c. the available draught decreases with increasing outside air temperature
d. all of the above

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Q9. What is the pH value of water permissible for boiler?

a. 0
b. 7
c. slightly less than 7
d. slightly more than 7

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Q10. The formation of scale boiler leads to

a. decrease in efficiency of boiler
b. increase in efficiency of boiler
c. increase in heat transfer
d. decrease in maintenance of boiler

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