Steam and Gas Turbines Multiple Choice Questions on “Casing and Metallurgical Considerations”.
1. Turbine casing controls _______________
a) working fluid
b) pressure
c) temperature
d) none of the mentioned
Answer: a
Clarification: Turbine casing can also control the working fluid.
2. Turbine casing also contains __________ working fluid.
a) temperature of
b) flow direction of
c) pressure
d) none of the mentioned
Answer: b
Clarification: Turbine casing contains the working fluid and also controls the direction of flow of it.
3. __________ is also used to direct the working fluid.
a) Guide vanes
b) Casing
c) Guide vanes & Casing
d) None of the mentioned
Answer: c
Clarification: Casing can control the working fluid which means it can direct the working fluid.
4. There is a possibility of leakage in between turbine rotor and ________
a) casing
b) valves
c) casing & valves
d) none of the mentioned
Answer: a
Clarification: As casing contains working fluid, there is a problem of leakage in between casing and turbine rotor.
5. In Tandem compound casing a _________ casing are directly coupled together to a generator.
a) single
b) multiple
c) two
d) none of the mentioned
Answer: b
Clarification: In tandem compound casing two or more casings are coupled together to a driven generator.
6. In single casing, Casing is directly coupled to a _____________
a) generator
b) combustor
c) generator & combustor
d) none of the mentioned
Answer: a
Clarification: In single casing, casing is directly coupled to a turbine generator.
7. Cross compounded turbines are used for __________ applications.
a) smaller
b) larger
c) medium
d) none of the mentioned
Answer: b
Clarification: Cross compounded turbines are used for larger applications.
8. Double exhaust rotors have ________ pressure casings.
a) high
b) low
c) medium
d) none of the mentioned
Answer: b
Clarification: Double exhaust rotors use low pressure casings.
9. Two flow rotors use __________ pressure casings.
a) low
b) high
c) medium
d) none of the mentioned
Answer: a
Clarification: Two flow rotors use low pressure casings.
10. In a steam turbine a set of ________ blades are connected to casing.
a) stationary
b) rotating
c) stationary & rotating
d) none of the mentioned
Answer: b
Clarification: In a steam turbine a set of stationary blades are connected to casing.
11. With metallurgical considerations the temperature in Gas turbine blades is reduced by ________
a) 2000 F
b) 3000 F
c) 1000 F
d) none of the mentioned
Answer: a
Clarification: Due to metallurgical consideration the temperature of turbine blades is reduced by 2000F.
12. Due to metallurgical consideration in closed cycle cooling system the upper temperature is limited to _____________
a) 500 C
b) 540 C
c) 200 C
d) none of the mentioned
Answer: b
Clarification: Due to metallurgical consideration in a closed cycle cooling system upper limit is fixed to 540 C.
13. Due to metallurgical consideration _____________ can be limited.
a) pressure
b) volume
c) temperature
d) none of the mentioned
Answer: c
Clarification: Temperature can be limited by metallurgical considerations.
14. For continuous operation in elevated temperature ______________ cooled materials are used for blades.
a) Ceramic
b) Ceramic and liquid
c) Liquid
d) None of the mentioned
Answer: b
Clarification: For continuous operation in elevated temperatures ceramic and liquid cooled materials are used for turbine blades.
15. Metallurgical considerations ________________ the material can bare which is used to manufacture blades.
a) maximum temperature
b) maximum pressure
c) maximum temperature & pressure
d) none of the mentioned
Answer: c
Clarification: Metallurgical consideration define the maximum temperature and pressure the metal can bare which is used to manufacture the blade.