Gas turbine works on______________?

Related Mcqs:

1. The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is_______________?

   A. low
   B. high
   C. same
   D. low/high depending on make and type
   E. unpredictable

2. 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

3. 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

4. As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio_____________________?

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

5. If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches _________________?

   A. isothermal
   B. isentropic
   C. adiabatic
   D. isochoric
   E. isobaric

6. 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

7. Open cycle gas turbine works on___________________?

   A. Brayton or Atkinson cycle
   B Rankine cycle
   C. Carnot cycle
   D. Erricsson cycle
   E. Joule cycle

8. Gas turbine works on_______________?

   A. Brayton or Atkinson cycle
   B. Carnot cycle
   C. Rankine cycle
   D. Erricsson cycle
   E. Joule cycle

9. Maximum temprature in a gas turbine is of the order of COMPRESSORS, GAS TURBINES AND JET ENGINES______________________?

   A. 2500°C
   B. 2000°C
   C. 1500°C
   D. 1000°C
   E. 700°C

10. A gas turbine used in air craft should have______________________?

    A. high h.p. and low weight
    B. low weight and small frontal area
    C. small frontal area and high h.p.
    D. high speed and high h.p.
    E. all of the above