Power Plant Engineering Multiple Choice Questions on “Steam Generator Types – II”.
1. The boiler in which the tubes are surrounded by hot gases is called ___________
a) fire tube boiler
b) water tube boiler
c) both fire and water tube boiler
d) none of the mentioned
Answer: b
Clarification: A water tube boiler is a boiler in which the cool water containing water tubes are surrounded by hot gases.
2. Which of these is not a type of steam generator depending upon the kind of applications?
a) utility steam generators
b) marine steam generators
c) agricultural steam generators
d) industrial steam generators
Answer: c
Clarification: There are three types of steam generators depending upon the type of application which are utility, industrial & marine steam engines.
3. What is the critical pressure of steam in a utility steam generator?
a) 220.2 bar
b) 221.2 bar
c) 222.2 bar
d) 225.2 bar
Answer: b
Clarification: The critical pressure of steam in a utility steam generator is 221.2 bar.
4. Which of the following are drumless once-through steam generators?
a) Subcritical steam generator
b) Supercritical steam generators
c) Utility steam generators
d) Marine steam generators
Answer: b
Clarification: Supercritical steam generators are drumless once-through steam generators while the subcritical steam generators are the water-tube drum type ones.
5. The subcritical steam generators operate between a pressure ranges of ___________
a) 120-160 bar
b) 100-110 bar
c) 130-180 bar
d) 140- 200 bar
Answer: c
Clarification: The subcritical steam generators operate between a pressure range of 130-180 bar.
6. The supercritical steam generators operate at a pressure range of ___________
a) 200-240 bar
b) 200-220 bar
c) 220- 240 bar
d) >240 bar
Answer: d
Clarification: The supercritical steam generators operate at a pressure range of more than 240 bar.
7. Industrial steam generators operate in a pressure range of ___________
a) 5-105 bar
b) 6-106 bar
c) <5 bar
d) >105 bar
Answer: a
Clarification: Industrial steam generators operate in a pressure range of 5-105 bar.
8. Industrial steam generators operate at a steam capacity of ___________
a) 1300 kg/s
b) 1000 kg/s
c) 500 kg/s
d) 125 kg/s
Answer: d
Clarification: Industrial steam generators operate at a steam capacity of about 125 kg/s which is lesser than that of utility steam generators.
9. Marine steam generators are ___________ fired.
a) water
b) oil
c) phenol
d) none of the mentioned
Answer: b
Clarification: Marine steam generators are oil-fired.
10. What is the pressure range between which a marine steam generator works?
a) 100-200 bar
b) 60-65 bar
c) 80-100 bar
d) 70-85 bar
Answer: b
Clarification: The pressure range between which a marine steam generator works is 60-65 bar.
11. In a fire-tube boiler, the water is in ___________
a) tube
b) shell
c) drum
d) all of the mentioned
Answer: b
Clarification: A fire-tube boiler is one in which the hot flue gases flow through the tubes surrounded by water in a shell.
12. In a water-tube boiler, water flows through?
a) drum
b) shell
c) tube
d) none of the mentioned
Answer: a
Clarification: In a water-tube boiler, water from a drum flows through the tubes & hot gases flow over them.