271. In a gas turbine plant, regeneration is done to
(A) increase compression work
(B) decrease turbine work
(C) limit the maximum temperature
(D) improve plant efficiency
Answer: - improve plant efficiency
272. The motion of rocket is based on the principal of conservation of
(A) Linear momentum
(B) Angular momentum
(C) Kinetic energy
(D) Mass
Answer: - Linear momentum
273. The helix angel for single helical gears ranger from
(A) 10° to 15°
(B) 15° to 20°
(C) 20° to 35°
(D) 35° to 50°
Answer: - 20° to 35°
274. No substance can exist in the liquid phase in stable equilibrium
(A) at temperature below the triple point temperature
(B) at pressure below the triple point pressure
(C) at pressure above the triple point pressure
(D) at temperature above the triple point temperature
Answer: - at pressure below the triple point pressure
275. In diesel engine, the compression ratio in comparison to expansion ratio is
(A) same
(B) less
(C) more
(D) variable
Answer: - more
276. The main cause for the change in engine oil viscosity is
(A) Humidity
(B) Temperature
(C) Vibration
(D) Contamination
Answer: - Temperature
277. The component deforming progressively under load at high temperatures is called as
(A) Resilience
(B) Creep
(C) Fatigue
(D) All of the above
Answer: - Creep
278. Which of the following projection methods does not use projectors perpendicular to the projection plane?
(A) isometric
(B) orthographic
(C) oblique
(D) axonometric
Answer: - oblique
279. Sensible heat is
(A) the heat which causes change of state
(B) the heat which does not allow temperature to rise
(C) the heat which brings about change in temperature
(D) all the above
Answer: - the heat which brings about change in temperature
280. The intercooling in multi-stage compressors is done
(A) to cool the air during compression
(B) to cool the air at delivery
(C) to enable compression in two stages
(D) to minimize the work of compression
Answer: - to minimize the work of compression
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