Compressors - Interview Questions | Exam2Win

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1. 1 m of air at atmospheric condition weighs approximately

A. 0.5 kg

B. 1.0 kg

C. 1.3 kg

D. 2.2 kg

E. 3.2 kg.

Explanation:

2. Compression efficiency is compared against

A. ideal compression

B. adiabatic compression

C. botii isothermal and adiabatic compression

D. isentropic compression

E. isothermal compression.

Explanation:

3. Efficiency of gas turbine is increased by

A. reheating

B. inter cooling

C. adding a re generator

D. all of the above

E. none of the above.

Explanation:

4. The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio

A. increases

B. decreases

C. first increases and then decreases

D. first decreases and then increases

E. remains same.

Explanation:

5. The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is

A. heated

B. compressed air before entering the combustion chamber is heated

C. bled gas from turbine is heated and readmitted for complete expansion

D. exhaust gases drive the compressor

E. part of exhaust gases are heated and mixed up with atmospheric air to utilize exhaust heat.

Explanation: