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Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

Exercise : Compressors, Gas Dynamics and Gas Turbines - Section 4
6.
The multi-stage compression ofair as compared to single stage compression
improves volumetric efficiency for the given pressure ratio
reduces workdone per kg of air
gives more uniform torque
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Which one of the following is the effect of blade shape on performance of a centrifugal compressor ?
Backward curved blades has poor efficiency
Backward curved blades lead to stable performance
Forward curved blades has higher efficiency
Forward curved blades produce lower pressure ratio
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
In a jet engine, the air-fuel ratio is
30:1
40:1
50:1
60:1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Which of the following bladings will give maximum pressure rise in a centrifugal compressor, assuming the same overall dimensions, blade inlet angle and rotational speeds ?
Forward curved blades
Backward curved blades
Radial blades
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
In an axial flow compressor, the ratio of pressure in theTOtor blades to the pressure rise in the compressor in one stage is known as
work factor
slip factor
degree of reaction
pressure coefficient
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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