Compressors, Gas Turbines and Jet Engines
For slow speed large capacity compressor, following type of valve will be best suited

Any of the above
Disc or feather type
Mechanical valve of the Corliss, sleeve, rotary or semi rotary type
Poppet valve

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Compressors, Gas Turbines and Jet Engines
Which one of the following is the effect of blade shape on performance of a centrifugal compressor?

Backward curved blades lead to stable performance
Forward curved blades produce lower pressure ratio
Backward curved blades has poor efficiency
Forward curved blades has higher efficiency

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Compressors, Gas Turbines and Jet Engines
In a jet propulsion

None of these
The propulsive matter is ejected from within the propelled body
Its functioning does not depend upon presence of air
The propulsive matter is caused to flow around the propelled body

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