Mechanical Engineering Questions And Answers :: Compressors: part5

Mechanical Engineering : Compressors QUESTIONS AND ANSWERS :: part5 : 1 to 5

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations :

1.As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio

remains same
first increases and then decreases
first decreases and then increases.

2.Efficiency of gas turbine is increased by

inter cooling
adding a re generator
all of the above
none of the above.

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

first increases and then decreases
first decreases and then increases
remains same.

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

compressed air before entering the combustion chamber is heated
bled gas from turbine is heated and readmitted for complete expansion
exhaust gases drive the compressor
part of exhaust gases are heated and mixed up with atmospheric air to utilize exhaust heat.

5.The degree of reaction of an axial flow turbine is the ratio of is entropic temperature drop in a blade row to the

adiabatic temperature drop in the stage
total temperature drop
total temperature drop in the stage
total adiabatic temperature drop
difference of maximum and minimum temperature in the cycle.

More Compressors QUESTIONS AND ANSWERS available in next pages

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