This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Turbine Casting and Exhaust Frames”.
1. Exhaust frame and exhaust diffuser are connected ____________
a) one after other
b) together
c) not connected
d) none of the mentioned
View Answer
Explanation: Exhaust frame and exhaust diffuser are connected together. Gases coming out of exhaust frames has high pressure and when connected to diffuser pressure energy is converted into velocity.
2. Exhaust frame is connected to the _________
a) aft flange
b) diffuser
c) aft flange & diffuser
d) none of the mentioned
View Answer
Explanation: Exhaust frame is connected to the aft flange and also diffuser. Exhaust frame is connected to diffuser using aft flange.
3. Aft flange is present on the turbine shell.
a) True
b) False
View Answer
Explanation: Aft flange is present on the turbine shell.
4. _____________ are further divided in outer cylinder and inner cylinder.
a) Aft flange & Exhaust frame
b) Aft flange
c) Exhaust frame
d) None of the mentioned
View Answer
Explanation: Exhaust frames are further divided in outer cylinder and inner cylinder. Inner cylinder of exhaust frame has parts used to connect to diffuser.
5. In exhaust frames inner and outer cylinder are connected using __________
a) structs
b) aft flange
c) structs & aft flange
d) none of the mentioned
View Answer
Explanation: Structs are used to connect both inner and outer cylinder in exhaust frame. Where as aft flange is connected to outer casing of the exhaust frame.
6. Exhaust diffuser is located at extreme _________
a) aft flange
b) aft end
c) exhaust frame
d) none of the mentioned
View Answer
Explanation: Exhaust diffuser is located at extreme aft end. Where one end of aft flange is connected to exhaust frame.
7. Exhaust diffuser is supported by exhaust frame.
a) True
b) False
View Answer
Explanation: Exhaust diffuser is supported by exhaust frame.
8. __________ are present at the end of exhaust diffuser.
a) Guide vanes
b) Stationary vanes
c) Guide & Stationary vanes
d) None of the mentioned
View Answer
Explanation: Guide vanes are present at the end of exhaust diffuser. Stationary vanes are used to guide the working fluid in the required direction and hence they are also called as guide vanes.
9. Struts supporting inner and outer cylinder are to be maintaned at _______ temperature.
a) increasing
b) variable
c) constant
d) none of the mentioned
View Answer
Explanation: When temperature is not constant thermal stresses developed and center position may vary.
10. Cooling air is made to flow through the gaps in between struts.
a) True
b) False
View Answer
Explanation: Cooling air is made to flow so that the temperature remains constant.
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