Engineering :: Turbo machines
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1. |
Which of the following preferred for supercharging of internal combustion engines? |
A. |
Roots blower |
B. |
Axial flow compressor |
C. |
Sliding vane type compressor |
D. |
Reciprocating compressor |
Answer: Option A
Explanation:
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2. |
In an axial flow compressor, the pressure rise occurs in |
A. |
fixed blades only |
B. |
Moving blades only |
C. |
Both fixed and moving blades |
D. |
none of the above |
Answer: Option C
Explanation:
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3. |
An axial flow compressor has |
A. |
larger blades at gas entry and smaller blades at exit |
B. |
smaller blades at gas entry and larger blades at exit |
C. |
identical dlades at exit as well as entry |
D. |
size of blades remains same only angles changes |
Answer: Option A
Explanation:
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4. |
An axial flow compressor is suitable for |
A. |
high volume flow rates with a small pressure rise |
B. |
high volume flow rates with high pressure rise |
C. |
low volume flow rates with low pressure rise |
D. |
low volume flow rates with high pressure rise |
Answer: Option A
Explanation:
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5. |
In a gas turbine cycle regenerator is used to |
A. |
heat the gases coming out of combustion chamber |
B. |
heat fuel supplied to combustion chamber |
C. |
heat air supplied to combustion chamber |
D. |
heat exhaust gases released from low pressure turbine |
Answer: Option C
Explanation:
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6. |
A regenerator can be used on |
A. |
open cycle gas turbines only |
B. |
closed cycle gas turbines only |
C. |
both open as well as closed cycle gas turbines |
D. |
none of the above |
Answer: Option C
Explanation:
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7. |
Thermal efficiency of a gas turbine cycle can be improved by |
A. |
reheating between expansion stage |
B. |
intercooling between compression stges |
C. |
regeneration |
D. |
any of the above |
Answer: Option D
Explanation:
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8. |
Gas turbine used in aircraft is of |
A. |
open cycle type |
B. |
closed cycle type with reheating |
C. |
closed cycle type with reheating and regeneration and intercooling |
D. |
open cycle type with reheating, regeneration and intercooling |
Answer: Option A
Explanation:
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9. |
A diffuser is used to |
A. |
increase velocity and decrease pressure |
B. |
increase velocity as well as pressure |
C. |
decrease velocity and increase pressure |
D. |
decrease velocity as well as pressure |
Answer: Option C
Explanation:
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10. |
In which of the following heat exchanger, heat is extracted from air? |
A. |
Regenerator |
B. |
Reheater |
C. |
Intercooler |
D. |
All of the above |
Answer: Option C
Explanation:
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