Compressors, Gas Turbines And Jet Engines MCQ Questions & Answers | Mechanical Engineering

A. Pressure ratio

B. Pressure coefficient

C. Degree of reaction

D. Slip factor

A. Pulse-jet requires no ambient air for propulsion

B. Ramjet engine has no turbine

C. Turbine drives compressor in a Turbojet

D. Bypass turbojet engine increases the thrust without adversely affecting, the propulsive efficiency and fuel economy

A. Centrifugal compressors deliver practically constant pressure over a considerable range of capacities

B. Axial flow compressors have a substantially constant delivery at variable pressures

C. Centrifugal compressors have a wider stable operating range than axial flow compressors

D. Axial flow compressors are bigger in diameter compared to centrifugal type

A. Large gas turbines employ axial flow compressors

B. Axial flow compressors are more stable than centrifugal type compressors but not as efficient

C. Axial flow compressors have high capacity and efficiency

D. Axial flow compressors have instability region of operation

A. 0.1%

B. 0.5%

C. 1.0%

D. 5%

A. Small quantities of air at high pressures

B. Large quantities of air at high pressures

C. Small quantities of air at low pressures

D. Large quantities of air at low pressures

A. Same

B. More

C. Less

D. Zero

A. Isothermal H.P/indicated H.R

B. Isothermal H.P./shaft H.R

C. Total output/air input

D. Compression work/motor input

A. High calorific value

B. Ease of atomisation

C. Low freezing point

D. Both (A) and (C) above

A. Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions

B. Volume of air delivered by the compressor

C. Volume of air sucked by the compressor during its suction stroke

D. None of the above