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

A. 0.1%

B. 0.5%

C. 1%

D. 5%

A. Less

B. More

C. Same

D. More/less depending on compressor capacity

A. Diffuser inlet radius

B. Diffuser outlet radius

C. Impeller inlet radius

D. Impeller outlet radius

A. $$1 - {\text{K}} + {\text{K}}{\left( {\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}}} \right)^{\frac{1}{{\text{n}}}}}$$

B. $$1 + {\text{K}} - {\text{K}}{\left( {\frac{{{{\text{p}}_2}}}{{{{\text{p}}_1}}}} \right)^{\frac{1}{{\text{n}}}}}$$

C. $$1 - {\text{K}} + {\text{K}}{\left( {\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}}} \right)^{\frac{{{\text{n}} - 1}}{{\text{n}}}}}$$

D. $$1 + {\text{K}} - {\text{K}}{\left( {\frac{{{{\text{p}}_2}}}{{{{\text{p}}_1}}}} \right)^{\frac{{{\text{n}} - 1}}{{\text{n}}}}}$$

A. Larger air handling ability per unit frontal area

B. Higher pressure ratio per stage

C. Aerofoil blades are used

D. Higher average velocities

A. Increases

B. Decreases

C. Remain constant

D. First decreases and then increases

A. Increases

B. Decreases

C. First increases and then decreases

D. First decreases and then increases

A. Compressor

B. Heating chamber

C. Cooling chamber

D. All of these

A. Start-stop motor

B. Constant speed unloader

C. Relief valve

D. Variable speed

A. Ammonia and water vapour

B. Carbon dioxide

C. Nitrogen

D. Hydrogen