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

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

A. Cool the air

B. Decrease the delivery temperature for ease in handling

C. Cause moisture and oil vapour to drop out

D. Reduce volume

A. Remove impurities from air

B. Reduce volume of air

C. Cause moisture and oil vapour to drop out

D. Cool the air

A. Closed cycle gas turbine is an I.C engine

B. Gas turbine uses same working fluid over and over again

C. Ideal efficiency of closed cycle gas turbine plant is more than Carnot cycle efficiency

D. Thrust in turbojet is produced by nozzle exit gases

A. Gas turbine requires lot of cooling water

B. Gas turbine is capable of rapid start up and loading

C. Gas turbines has flat efficiency at part loads

D. Gas turbines have high standby losses and require lot of maintenance

A. Large gas turbines use radial inflow turbines

B. Gas turbines have their blades similar to steam turbine

C. Gas turbine's blade will appear as impulse section at the hub and as a reaction section at tip

D. Gas turbines use both air and liquid cooling

A. Gas turbine uses low air-fuel ratio to economise on fuel

B. Gas turbine uses high air-fuel ratio to reduce outgoing temperature

C. Gas turbine uses low air-fuel ratio to develop the high thrust required

D. All of the above

A. High h.p. and low weight

B. Low weight and small frontal area

C. Small frontal area and high h.p.

D. High speed and high h.p.

A. Increases

B. Decreases

C. Remain unaffected

D. May increase or decrease depending on compressor capacity

A. Closed cycle

B. Open cycle

C. Both of the above

D. Closed/open depending on other considerations