This set of Power Plant Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Steam generators”.
1. How can we classify steam generators on the basis of application?
a) utility steam generators
b) industrial steam generator
c) marine steam generator
d) all of the mentioned
View Answer
Explanation: Steam generators can be classified in a number of ways, on the basis of application these three generators are known.
2. What is the critical pressure of steam?
a) 221.2 bar
b) 220 bar
c) 120 bar
d) 300 bar
View Answer
Explanation: Below 221.2 its sub critical and above 221.2 its super critical.
3. An air preheater is installed _____________
a) between the economiser and chimney
b) before the superheater
c) before the economiser
d) none of the mentioned
View Answer
Explanation: Preheater is used to increase the temperature of steam.
4. What is the length of shell of a Locomotive boiler?
a) 5m
b) 4m
c) 3m
d) 2m
View Answer
Explanation: It is fixed due to mechanical constraints.
5. Which of the following statement is correct?
a) A simple vertical boiler has one fire tube
b) A fire tube boiler occupies less space than a water tube boiler, for a given power
c) Steam at a high pressure and in large quantities can be produced with a simple vertical boiler
d) all of the mentioned
View Answer
Explanation: A typical vertical boiler can have only one fire tube for the flow of fire or heat.
6. The object of producing draught in a boiler is _________
a) to discharge the gases of combustion to the atmosphere through the chimney
b) all of the mentioned
c) to exhaust the gases of combustion from the combustion chamber
d) to provide an adequate supply of air for the fuel combustion
View Answer
Explanation: None.
7. The natural draught is produced by _________
a) team jet
b) chimney
c) centrifugal fan
d) none of the mentioned
View Answer
Explanation: When air or flue gases flow due to the difference in density of the hot flue gases and cooler ambient gases.
8. Which of the following statement is wrong?
a) Water tube boilers are internally fired
b) Locomotive boiler is a water tube boiler
c) La-mont boiler is a low pressure water tube boiler
d) All of the mentioned
View Answer
Explanation: Water tube boilers are externally fired where as fire tube boilers are internally fired.
9. Which of the following boiler is best suited to meet the fluctuating demand of steam?
a) Locomotive boiler
b) Lancashire boiler
c) Babcock and Wilcox boiler
d) Cornish boiler
View Answer
Explanation: Because forced draught is provided in the locomotive boiler by injecting exhausted steam back into the exhaust via a blast pipe in the smokebox.
Sanfoundry Global Education & Learning Series – Power Plant Engineering.
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