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Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines

Exercise : Compressors, Gas Dynamics and Gas Turbines - Section 3
11.
The overall isothermal efficiency of the compressor is defined as the ratio of
work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio
isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor
volume of free air delivery per stroke to the swept volume of the piston
isentropic power to the power required to drive the compressor
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
The minimum work required for a three stage reciprocating air compressor is __________ the work required for each stage.
equal to
double
three times
six times
Answer: Option
Explanation:
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13.
For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.
True
False
Answer: Option
Explanation:
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14.
In a high pressure compressor, the delivery pressure is
1 to 5 bar
5 to 8 bar
8 to 10 bar
10 to 15 bar
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades are said to be
forward curved
backward curved
radial
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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