Category: Compressors, Gas Turbines and Jet Engines

Pick up wrong statement ?
A. mass flow rate
B. pressure ratio
C. change in load
D. stagnation pressure at the outlet
E. all of the above

A. thrust power and fuel energy
B. engine output and propulsive power
C. propulsive power and fuel input
D. thrust power and propulsive power
E. none of the above

A. vacuum
B. atmospheric air
C. compressed air
D. oxygen alone
E. liquid hydrogen

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

A. stainless steel
B. high alloy’ steel
C. duralumin
D. Timken, Haste and Inconel allpys
E. titanium

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

A. pulsojet requires no ambient air for propulsion
B. ramjet-engine has no turbine
C. turbine drives compressor in a burbojet
D. bypass turbo-jet engine increases the thrust without adversely affecting, the propulsive efficiency and fuel economy
E. propeller is an indirect reaction device

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

A. compression index
B. compression ratio
C. compressor efficiency
D. mean effective pressure
E. compressor effectiveness

A. same as isothermal
B. same as adiabatic
C. better than isothermal and adiabatic
D. in between isothermal and adiabatic
E. none of the above