A. increase of work ratio
B. decrease of thermal efficiency
C. decrease of work ratio
D. both A. and B. above
E. both B. and C. above
- Volumetric efficiency of air compressors is of the order of________________?
- A. 20-30% B. 40-50% C. 60-70% D. 70-90% E. 90-100%...
- For slow-speed large capacity compressor, following type of valve will be best suited________________?
- A. poppet valve B. mechanical valve of the corliss, sleeve, rotary or semirotary type C. disc or feather type D. any of the above E. none of the above...
- Open cycle gas turbine works on___________________?
- A. Brayton or Atkinson cycle B Rankine cycle C. Carnot cycle D. Erricsson cycle E. Joule cycle...
- 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...
- The weight per horse power ratio for gas. turbine as compared to I.C. engine and steam turbine is________________?
- A. same B. higher C. lower D. uncomparable E. unpredictable...