The following property is most important for material used for gas turbine blade___________________?

A. Toughness
B. Fatigue
C. Creep
D. Corrosion resistance

Fighter bombers use following type of engine __________________?

A. Turbo-jet
B. Turbo-propeller
C. Rocket
D. Ram-jet ,

The blades of gas turbine are made of_________________?

A. mild steel
B. stainless steel
C. carbon steel
D. high alloy seel

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

In jet propulsion power unit, the inlet duct of diverging shape is used in order to _______________ ?

A. Collect more air
B. Convert kinetic energy of air into pres-sure energy
C. Provide robust structure
D. Beautify the shape

The air entry velocity m a rocket as compared to aircraft is_________________?

A. Same
B. More
C. Less
D. Zero

Propulsion efficiency of the following order-is obtained in practice _______________?

A. 34%
B. 50%
C. 60%
D. 72%

The maximum propulsion efficiency of a turbojet is attained at around following speed __________________?

A. 550 km/hr
B. 1050km/hr
C. 1700 km/hr
D. 2400km /hr

A rocket works with maximum overall efficiency when air craft velocity is equal to the_________________?

A. Jet velocity
B. Twice the jet velocity
C. Half the jet velocity
D. Average of the jet velocity

In the cross compounding of the gas turbine plant__________________?

A. H.p. compressor l connected to h.p. turbine and l.p. compressor ot l.p. tur-bine
B. H.p. compressor is connected to l.p. turbine and l.p. compressor is con-nected to h.p. turbine
C. Both the arrangements can be employed
D. All are connected in series