The ratio of specific weighf/h.p. of gas turbin and I.C engines may be typically of the order of_______________________?

Related Mcqs:

1. Mechanical efficiency of gas turbines as compared to I.C engines is____________________?

   A. higher
   B. lower
   C. same
   D. depends on on odier considerations
   E. unpredictable

2. It is not possible to use closed gas turbine cycle in aeronautical engines because_________________ ?

   A. it is inefficient
   B. it is bulky
   C. it requires cooling water for its operation
   D. non of theses

3. In jet engines the products of combustion after passing through the gas lurbine are discharged into_______________?

   A. atmosphere
   B. back to the compressor
   C. discharge nozzle
   D. vacuum
   E. none of the above

4. 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

5. The work ratio of a gas turbine plant is defined as the ratio of__________________?

   A. net work output and heat supplied (6) net work output and work done by tur¬bine
   C. actual heat drop and isentropic heat drop
   D. net work output and isentropic heat drop
   E. isentropic increase/drop in tempera¬ture and actual increase/ drop in temperature

6. 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

7. In the axial flow gas turbine, the work ratio is the ratio of____________________?

   A. compressor work and turbine work
   B. output and input
   C. actual total head tempeature drop to the isentrpic total head drop from total head inlet to static head outlet
   D. actual compressor work and theoretical comprssor work
   E. none of the above

8. Work ratio of a gas turbine plant is ratio of______________________?

   A. net work output and work done by turbine
   B. net work output and heat supplied
   C. work done by turbine and heat supplied
   D. work done by turbine and net work output
   E. actual/heat drop and isentropic heat drop

9. Pressure ratio in gas turbines is the ratio of ____________________?

   A. compressor pressure ratio
   B. highest pressure to exhaust pressure
   C. inlet pressure to exhaust pressure
   D. pressures across the turbine
   E. none of the above

10. 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