221. Atmospheric pressure is 1.03 kg/cm and vapour pressure is 0.03 kg/cm . The air pressure will be_____________________ ?
A. 1.03 kg/cm2
B. 1.06 kg/cm2
C. 1.00 kg/cm2
D. 0.53 kg/cm2
E. 0.5 kg/cm2
222. Axial flow compressor resembles____________________ ?
A. centrifugal pump
B. reciprocating pump
C. turbine
D. sliding vane compressor
E. none of the above
223. 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
224. The work ratio of simple gas turbine cycle depends on_________________?
A. pressure ratio
B. maximum cycle temperature
C. minimum cycle temperature
D. all of the above
E. none of die above
225. Open cycle gas turbine works on___________________?
A. Brayton or Atkinson cycle
B Rankine cycle
C. Carnot cycle
D. Erricsson cycle
E. Joule cycle
226. Gas turbines for power generation are normally used___________________?
A. to supply base load requirements
B. to supply peak load requirements
C. to enable start thermal power plant
D. in emergency
E. when other sources of power fail
227. Surging phenomenon in centrifugal com-pressor depends on ___________________?
Pick up wrong statement ?
A. mass flow rate
B. pressure ratio
C. change in load
D. stagnation pressure at the outlet
E. all of the above
228. The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is called__________________?
A. pressure ratio
B. pressure coefficient
C. degree of reaction
D. slip factor
E. stage factor
229. Actual compression curve is___________________?
A. same as isothermal
B. same as adiabatic
C. better than isothermal and adiabatic
D. in between isothermal and adiabatic
E. none of the above
230. 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
NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
THANK YOU