POWER PLANT ENGG MCQ PART 5

Gas turbine power plant

1. Gas turbine power plant is.......efficient than steam turbine plant

   A.More

   B.Less

   C.Same

   D.None of the above 

A.More 

2. Maximum combustion pressure in a gas turbine is........as compared to diesel engine

   A.Same

   B.Less

   C.More

   D.None of the above

B.Less

3. Capital cost of a gas turbine plant........than that of a steam power plant of same capacity

   A.Same

   B.Lower

   C.Higher

   D.None of the above 

B.Lower

4. In a gas turbine plant,a re generator increases........

   A.Work output

   B.Pressure ratio

   C.Thermal efficiency

   D.All of the above

C.Thermal efficiency

5. In a gas turbine,high thermal efficiency is obtained in........

   A.Closed cycle

   B.Open cycle

   C.In both the cycles

   D.All the above cycles

A.Closed cycle

6. Thermal efficiency of a gas turbine power plant as compared to diesel engine plant is

   A.Higher

   B.Lower

   C.Same

   D.May be higher or lower

B.Lower 

7. Thermal efficiency of a closed cycle gas turbine plant increases by........

   A.Reheating

   B. Inter cooling

   C. Re generator

   D.All of the above

D.All of the above

8. Maximum temperature of a gas turbine plant is of the order of.......

   A.700⁰

   B.900⁰

   C.2100⁰

   D.2500⁰

A.700⁰

9. The blades of the gas turbine rotor are made of........

   A.Carbon steel

   B.Stainless steel

   C.High alloy steel

   D.High nickel alloy

D.High nickel alloy 

10. The thermal efficiency of a gas turbine with ideal regenerative heat exchanger is........

   A.Equal to work ratio

   B.Less than work ratio

   C.More than work ratio

   D.Um-predictable

A.Equal to work ratio 

11. Mechanical efficiency of a gas turbine as compared to internal combustion reciprocating engine is....

   A.Higher

   B.Lower

   C.Same

   D.Un-predictable

A.Higher

12. For a gas turbine the pressure ratio in the range of........

   A.2 to 3

   B.3 to 5

   C.16 to 18

   D.18 to 22

B.3 to 5

13. In a two stage gas turbine plant,reheating after first stage........

   A.Decrease the thermal efficiency

   B.Increase the thermal efficiency

   C.Does not effect the thermal efficiency

   D.None of the above

A.Decrease the thermal efficiency700⁰

14. In a two stage gas turbine plant,reheating after first stage........

   A.Increases work ratio

   B.Decreases work ratio

   C.Does not effect work ratio

   D.None of the above

A.Increases work ratio

15. In a two stage gas turbine plant,with inter cooling and reheating........

   A.Both work ratio and thermal efficiency improve

   B.Work ratio improves but thermal efficiency decreases

   C.Thermal efficiency improves but work ratio decreases

   D.Both work ratio and thermal efficiency decreases 

B.Work ratio improves but thermal efficiency decreases