The air is delivered __________ in one revolution in case of a three-lobbed rotor.
A. two times
B. three time
C. six times
D. four times
Answer C
In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
A. exit nozzle, which is a constant volume process
B. exit nozzle, which is essentially an isentropic process
C. turbine blades, which is a constant volume process
D. turbine blades, which is essentially an isentropic process
Answer D
In a centrifugal compressor, the ratio of the __________ to the blade velocity is called slip factor.
A. inlet whirl velocity
B. outlet whirl velocity
C. inlet velocity of flow
D. outlet velocity of flow
The mass of gas turbine per kW developed is about __________ as that of an I.C. engine.
A. Same
B. half
C. one - fourth
D. One-sixth
In a single stage, single acting reciprocating air compressor, without clearance, the workdone on the air during isentropic compression is __________ the heat required to raise the temperature of air from T1 to T2 at a constant pressure
A. Equal to
B. less than
C. greater than
D. a factor
Answer A
