A file removes the metal during___________________?

A. Both forward and return strokes
B. Forward stroke
C. Return stroke
D. None of these

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

If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?

A. Vi=v0b
B. Vt>v0
C. U,<v0
D. V,= u0

The working fluid in ai turbine is___________________?

A. In two phases
B. In three phases
C. In a single phase
D. In the form of air and water mixture

The compression ratio in a gas turbine is of the roder of____________________?

A. 3.5 : 1
B. 5 : 1
C. 8 : 1
D. 12 : 1

Ram-jet engine__________________?

A. Is self-operating at zero flight speed
B. Is not self-operating at zero^flight speed
C. Requires no air for its operation
D. Produces a jet consisting of plasma

A simple turbo-jet engine is basically_________________?

A. A propeller system
B. Gas-turbine engine equipped with a propulsive nozzle and diffuse*
C. Chemical rocket regine
D. Ram-jet enigne

In turbo fan engine, the jet velocity as compared to turbo-jet engine is_________________?

A. Less
B. More
C. Same
D. May be less or more depening upon speed

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

Which of the following plants is smallest and lightest for genrating a given amount of power__________________?

A. steam power plant
B. petrol engine
C. diesel engine’
D. solar plant