For a two stage compressor* if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will___________________?

Related Mcqs:

1. The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turine and fixed higher and lower temperature) with increase in pressure ratio will___________________?

   A. increase first at fast rate and then slow B. increase first at slow rate and then fast C. decrease continuously D. first increase, reach maximum and then decrease E. none of the above...

2. For minimum work in multistage compression, assuming same index of compression in all stages_________________?

   A. work done in first stage should be more B. work done in subsequent stages should increase C. work done in subsequent stages should decrease D. work done in all stages should be equal E. work done in any stage is no criterion for minimum work but depends on other factors...

3. Isothermal compression efficiency, even when running at high speed, can be approached by using A. multi-stage compression B. cold water spray C. both A. and B. above D. fully insulating the cylinder E. high stroke_________________?

   Isothermal compression efficiency, even when running at high speed, can be approached by using A. multi-stage compression B. cold water spray C. both A. and B. above D. fully insulating the cylinder E. high stroke...

4. The advantage of multistage compression over single stage compression is ________________?

   A. lower power consumption per unit of air delivered B. higher volumetric efficiency C. decreased discharge temperature D. moisture free air E. all of the above...

5. The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is_____________________?

   A. less B. more C. same D. more/less depending on compressor capacity E. unpredictable...

6. The compressor performance at higher altitude compared to sea level will be _______________?

   A. same B. higher C. lower D. dependent on other factors E. none of the above...

7. The pressure ratio of an ideal vaned compressor with increase in mass flow rate_________________?

   A. increases B. decreases C. remains constant D. first decreases and then increases E. unpredictable...

8. As the value of index ‘«’ is decreased, the volumetric efficiency will___________________?

   A. increase B. decrease C. remain unaffected D. may increase/decrease depending on compressor clearance E. none of the above...

9. More than one stage will be preferred for reciprocating compressor if the delivery pressure is more than____________________?

   A. 2 kg/cm2 B. 6 kg/cm2 C. 10 kg/cm2 D. 14.7 kg/cm2 E. none of the above...

10. There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would__________________?

    A. remain same B. decrease C. increase D. unpredictable E. none of the above...