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?

A)
Radial blades
B)
Forward curved blades
C)
Backward curved blades
D)
All of the above

Correct Answer : Option (B) :   Forward curved blades

Recently Updated in Compressors, Gas Dynamics and Gas Turbines Questions
The work ratio of simple gas turbine cycle depends on
A)
Pressure ratio
B)
Minimum cycle temperature
C)
Maximum cycle temperature
D)
All of the above

Correct Answer :   All of the above

Knudsen number ranges in between 0.3 and 1 in ________
A)
boundary region
B)
boundary & transient region
C)
transient region
D)
None of the above

Correct Answer :   transient region

Explanation : Knudsen number ranges in between 0.3 and 1 in transient region.

When altitude of earth is in between 90 km and 150 km Knudsen number can be in between 0.3 and _________
A)
1
B)
2
C)
3
D)
4

Correct Answer :   1

Explanation : When altitude of earth is in between 90 km and 150 km Knudsen number can be in between 0.3 and 1.

Mechanical Engineering MCQ's

Theory of Machines
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