141. A large clearance Volume in a reciprocating compressor results in
reduced volume flow rate
increased volume flow rate
lower suction pressure
lower delivery pressure
✅ The correct answer is option A.
Compressors, Gas Dynamics and Gas Turbines MCQs
142. The capacity of a compressor is expressed in
kg/m2
kg/m3
m3/min
m3/kg
✅ The correct answer is option C.
143. The inlet pressure is always __________ the discharge pressure.
equal to
less than
more than
✅ The correct answer is option B.
144. In axial flow compressor, exit flow angle deviation from the blade angle is a function of
blade camber
blade camber and incidence angle
space-chord ratio
blade camber and space-chord ratio
✅ The correct answer is option B.
145. The volume of air delivered by the compressor is called
free air delivery
compressor capacity
swept volume
none of these
✅ The correct answer is option B.
146. Rotary compressors are used for delivering
small quantities of air at high pressures
large quantities of air at high pressures
small quantities of air at low pressures
large quantities of air at low pressures
✅ The correct answer is option D.
147. The increase in pressure in a vane blower takes place first due to compression and then due to back flow of air.
Correct
Incorrect
✅ The correct answer is option A.
148. A rotary compressor is driven by an
electric motor
engine
either (a) or (b)
none of these
✅ The correct answer is option C.
149. The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called
compressor efficiency
volumetric efficiency
isothermal efficiency
mechanical efficiency
✅ The correct answer is option D.
150. The ratio of workdone per cycle to the stroke volume of the compressor is known as
compressor capacity
compression ratio
compressor efficiency
mean effective pressure
✅ The correct answer is option D.