(A) both forward and return strokes (X)
(B) forward stroke ()
(C) return stroke (X)
(D) none of these (X)

Answers: A file removes the metal during forward stroke.

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

Answers; In jet engines the products of combustion after passing through the gas lurbine are discharged into discharge nozzle.

(A) Vi=V0B ()
(B) Vt>V0 (X)
(C) U,<V0 (X)
(D) V,= U0 (X)
(E) Vri=Vm (X)

Answers: 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 Vi=V0B.

(A) in two phases (X)
(B) in three phases (X)
(C) in a single phase ()
(D) in the form of air and water mixture (X)
(E) gas and no air (X)

Answers: The working fluid in ai turbine is in a single phase.

(A) 3.5 : 1 (X)
(B) 5 : 1 (X)
(C) 8 : 1 ()
(D) 12 : 1 (X)
(E) 20 : 1 (X)

Answers: The compression ratio in a gas turbine is of the roder of  8 : 1.

(A) is self-operating at zero flight speed (X)
(B) is not self-operating at zero^flight speed ()
(C) requires no air for its operation (X)
(D) produces a jet consisting of plasma (X)
(E) none of the above (X)

Answers: Ram-jet engine is not self-operating at zero^flight speed.