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Hamad Compressors, Gas Turbines and Jet Engines 14/07/2021
E. does not Vary
- Adiabatic compression is one in which___________________?
- A. temperature during compression remains constant B. no heat leaves or enters the compressor cylinder during cornpression C. temperature rise follows a linear relationship D. work done is maximum E. entropy decreases...
- Volumetric efficiency of a compressor with clearance volume ________________?
- A. increases with increase in compression ratio B. decreases with increase in compression ratio C. in not dependent upon compression ratio D. may increase/decrease depending on compressor capacity E. unpredictable...
- Losses in a centrifugal compressor are due to__________________?
- A. inlet losses B. impeller channel losses C. diffuser losses D. all of the above E. none of the above...
- For an irreversible gas turbine cycle, the efficiency and work ratio both depend on___________________?
- A. pressure ratio alone B. maximum cycle temperature alone C. minimum cycle temperature alone D. both pressure ratio and maximum cycle temperature E. none of the above...
- High air-fuel ratio is used in gas turbines______________________?
- A. to increase the output B. to increase the efficiency C. to save fuel D. to reduce the exit temperature E. none of the above...
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