1000+ Gate Mechanical Engineering Question Papers with Solutions - 3

Question: 11

A heat exchanger that can remove fixed quantity of heat from a system is available where should it be installed for best economy

(A) as intercooler

(B) after final stage compression

(C) depends upon size of installation

(D) prior to first stage compression

Question: 12

High air fuel ratio in gas turbines

(A) restricts damage to turbine blades

(B) increases power output

(C) improves thermal efficiency

(D) reduces the exhaust temperature

Question: 13

The enthalpy of vaporisation is minimum at

(A) absolute zero

(B) critical temperature

(C) 0°C

(D) 100°C

Question: 14

Higher proportion of residual gases in the cylinder would mean

(A) depends on other factors

(B) no change in volumetric efficiency

(C) lower volumetric efficiency

(D) higher volumetric efficiency

Question: 15

The purpose of superheating an engine is

(A) to improve cooling of cylinders

(B) to reduce the noise of engine

(C) to reduce specific fuel consumption

(D) to increase the power output of engine