51. A compressor must be driven by some prime mover.
Agree
Disagree
✅ The correct answer is option A.
Compressors, Gas Dynamics and Gas Turbines MCQs
52. A 3 m3/min compressor means that it
compresses 3 m3/min of standard air
compresses 3 m3/ min of free air
delivers 3 m3/ min of compressed air
delivers 3 m3/ min of
✅ The correct answer is option B.
53. The pressure ratio in a centrifugal compressor can be increased by increasing the tip speed and lowering the inlet temperature.
Correct
Incorrect
✅ The correct answer is option A.
54. A receiver in compressor installations is used to damp pressure waves in compressor discharge.
Yes
No
✅ The correct answer is option A.
55. The mass of gas turbine per kW developed is about __________ as that of an I.C. engine.
same
one-half
one-fourth
one-sixth
✅ The correct answer is option D.
56. Which of the following statement is correct relating to rocket engines ?
The combustion chamber in a rocket engine is directly analogous to the reservoir of a super sonic wind tunnel
The stagnation conditions exist at the combustion chamber
The exit velocities of exhaust gases are much higher than those in jet engine
all of the above
✅ The correct answer is option D.
57. Slip factor in a centrifugal compressor indicates the amount of air leaked from the storage vessel.
Yes
No
✅ The correct answer is option B.
58. If the clearance ratio for a reciprocating air compressor is ‘K’, then its volumetric efficiency is given by
✅ The correct answer is option B.
59. A machine used to raise the pressure of air is called
gas turbine
I.C engine
compressor
air motor
✅ The correct answer is option C.
60. The operation of lifts, rams and pumps make use of compressed air.
Yes
No
✅ The correct answer is option A.