41. Gas turbine as compared to internal combustion engine
can be driven at a very high speed
produces uniform torque
has more efficiency
all of these
✅ The correct answer is option D.
Compressors, Gas Dynamics and Gas Turbines MCQs
42. For minimum work required to compress and deliver a quantity of air by multi-stage compression,
the compression ratio in each stage should be same
the intercooling should be perfect
the workdone in each stage should be same
all of the above
✅ The correct answer is option D.
43. In a centrifugal compressor, the flow of air is __________ to the axis of compressor.
parallel
perpendicular
inclined
none of these
✅ The correct answer is option B.
44. The axial flow compressor is preferred in air-craft gas turbines because of
low frontal area
higher thrust
high pressure rise
none of these
✅ The correct answer is option A.
45. The speed of rotary air compressor is __________ as compared to reciprocating air compressor.
high
low
✅ The correct answer is option A.
46. The clearance, in a single stage, single acting reciprocating air compressor does not effect the workdone on the air and the power required for compressing the air.
TRUE
FALSE
✅ The correct answer is option A.
47. In a gas turbine, air is obtained from the atmosphere and compressed in an air compressor.
TRUE
FALSE
✅ The correct answer is option A.
48. In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at
diffuser inlet radius
diffuser outlet radius
impeller inlet radius
impeller outlet radius
✅ The correct answer is option B.
49. The operation of the reciprocating air motor is similar to reciprocating air compressor.
TRUE
FALSE
✅ The correct answer is option B.
50. In a single stage, single acting reciprocating air compressor without clearance volume, the workdone is maximum during
isothermal compression
isentropic compression
polytropic compression
none of these
✅ The correct answer is option B.