Gas Turbines and Jet Engines Archives

Volumetric efficiency is_____________________?

Volumetric efficiency is_____________________?

A. the ratio of stroke volume to clearance volume
B. the ratio of the air actually delivered to the amount of piston displacement
C. reciprocal of compression ratio
D. index of compressor performance
E. proportional to compression ratio

Volumetric efficiency is_____________________? Read More »

Volumetric efficiency of a compressor without clearance volume________________?

Compressors, Gas Turbines and Jet Engines / admin

Volumetric efficiency of a compressor without clearance volume________________?

A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. is not dependent upon compressin ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable

Volumetric efficiency of a compressor without clearance volume________________? Read More »

Compressors, Gas Turbines and Jet Engines

Volumetric efficiency of air compressors is of the order of________________?

Compressors, Gas Turbines and Jet Engines / admin

Volumetric efficiency of air compressors is of the order of________________?

A. 20-30%
B. 40-50%
C. 60-70%
D. 70-90%
E. 90-100%

Volumetric efficiency of air compressors is of the order of________________? Read More »

Compressors, Gas Turbines and Jet Engines

Cylinder clearance in a compressor should be _________________?

Compressors, Gas Turbines and Jet Engines / admin

Cylinder clearance in a compressor should be _________________?

A. as large as possible
B. as small as possible
C. about 50% of swept volume
D. about 100% of swept volume
E. none of the above

Cylinder clearance in a compressor should be _________________? Read More »

Compressors, Gas Turbines and Jet Engines

Ratio of indicated H.P. and brake H.P. is known as_________________?

Compressors, Gas Turbines and Jet Engines / admin

Ratio of indicated H.P. and brake H.P. is known as_________________?

A. mechanical efficiency
B. volumetric efficiency
C. isothermal efficiency
D. adiabatic efficiency
E. relative efficiency

Ratio of indicated H.P. and brake H.P. is known as_________________? Read More »

Compressors, Gas Turbines and Jet Engines

Aeroplanes employ following type of compressor_______________?

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs / admin

Aeroplanes employ following type of compressor_______________?

A. radial flow
B. axial flow
C. centrifugal
D. combination of above
E. none of the above

Aeroplanes employ following type of compressor_______________? Read More »

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs

Compression efficiency is compared against_____________________?

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs / admin

Compression efficiency is compared against_____________________?

A. ideal compression
B. adiabatic compression
C. botii isothermal and adiabatic compression
D. isentropic compression
E. isothermal compression

Compression efficiency is compared against_____________________? Read More »

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs

An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes_______________?

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs / admin

An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes_______________?

A. one adiabatic, two isobaric, and one constant volume
B. two adiabatic and two isobaric
C. two adiabatic, one isobaric and one constant volume,
D. one adiabatic, one isobaric and two constant volume
E. two isobaric, two adiabatic and one constant volume

An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes_______________? Read More »

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs

The work done per unit mass of air in compression will’be least when n is equal to______________?

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs / admin

The work done per unit mass of air in compression will’be least when n is equal to______________?

A. 1
B. 1.2 ,
C. 1.3
D. 1.4
E. 1.5

The work done per unit mass of air in compression will’be least when n is equal to______________? Read More »

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs

An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes________________?

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs / admin

An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes________________?

A. one adiabatic, two isobaric, and one constant volume
B. two adiabatic and two isobaric
C. two adiabatic, one isobaric and one constant volume
D. one adiabatic, one isobaric and two constant volume
E. two isobaric, two adiabatic and one constant volume

An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes________________? Read More »

Compressors, Gas Turbines and Jet Engines, Mechanical Engineering Mcqs