A. isothermal h.p. to the BHP of motor
B. isothermal h.p. to adiabatic h.p.
C. power to drive compressor to isothermal h.p.
D. work to compress air isothermally to work for actual compression
E. isothermal work to ideal work
Related Mcqs:
- In multistage compressor, the isothermal compression is achieved by_________________?
A. employing intercooler
B. by constantly cooling the cylinder
C. by running compressor at very slow speed
D. by insulating the cylinder
E. none of the above - The work ratio of a gas turbine plant is defined as the ratio of__________________?
A. net work output and heat supplied (6) net work output and work done by tur¬bine
C. actual heat drop and isentropic heat drop
D. net work output and isentropic heat drop
E. isentropic increase/drop in tempera¬ture and actual increase/ drop in temperature - The ratio of work doen per cycle to the swept volume in case of compressor is called ______________?
A. compression index
B. compression ratio
C. compressor efficiency
D. mean effective pressure
E. compressor effectiveness - The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called__________________?
A. slip factor
B. velocity factor
C. velocity coefficient
D. blade effectiveness - The vloumetric efficiency of compressor with increase in compression ratio will ___________________?
A. increase
B. decrease
C. remain same
D. may increase/decrease depending on clearance volume
E. none of the above - The pressure ratio of an ideal vaned compressor with increase in mass flow rate_________________?
A. increases
B. decreases
C. remains constant
D. first decreases and then increases
E. unpredictable - The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turine and fixed higher and lower temperature) with increase in pressure ratio will___________________?
A. increase first at fast rate and then slow
B. increase first at slow rate and then fast
C. decrease continuously
D. first increase, reach maximum and then decrease
E. none of the above - Isothermal compression effeicency can be attained by running the compressor__________________?
A. at very high speed
B. at very slow speed
C. at average speed
D. at zero speed
E. isothermally - Isothermal compression efficiency, even when running at high speed, can be approached by using A. multi-stage compression B. cold water spray C. both A. and B. above D. fully insulating the cylinder E. high stroke_________________?
Isothermal compression efficiency, even when running at high speed, can be approached by using
A. multi-stage compression
B. cold water spray
C. both A. and B. above
D. fully insulating the cylinder
E. high stroke - Isothermal compression though most efficient, but is not -practicable because_________________?
A. ityrequires very big cylinder
B. it does not increase pressure much
C. it is impossible in practice
D. compressor has to run at very slow speed to achieve it
E. it requires cylinder to be placed in water
