Fuck you mga boards of mechanical engineers Flashcards
By superheating the refrigerant in vapor compression cycle with useful cooling, which of the following will increase? (use per unit mass analysis)
A. Condenser pressure
B. Evaporator pressure
C. Quality after expansion
D. Heat rejected from condenser
D
By superheating the refrigerant in vapor compression cycle with useful cooling, which of the following will decrease?
(use per unit mass analysis)
A. Refrigerated effect
B. COP
C. Compressor power
D. Mass flow rate
C
By superheating the refrigerant in vapor compression cycle without useful cooling, which of the following will
decrease? (use per unit mass analysis)
A. Heat rejected
B. COP
C. Compressor power
D. Specific volume at suction
B
By superheating the refrigerant in vapor compression cycle without useful cooling, which of the following will increase?
(use per unit mass analysis)
A. Refrigerated effect
B. COP
C. Compressor power
D. Mass flow rate
C
By sub-cooling the refrigerant in vapor compression cycle at condenser exit, which of the following will increase? (use per unit mass analysis)
A. Refrigerated effect
B. Specific volume at suction
C. Compressor power
D. Mass flow rate
A
By increasing the vaporizing temperature in vapor
compression cycle, which of the following will increase?
(Use per unit mass analysis)
A. mass flow rate
B. COP
C. specific volume at suction
D. compressor work
B
By sub-cooling the refrigerant in vapor compression cycle at condenser exit, which of the following will decrease?
(use per unit mass analysis)
A. Refrigerated effect
B. Specific volume at suction
C. Compressor power
D. Mass flow rate
D
By increasing the vaporizing temperature in vapor
compression cycle, which of the following will decrease?
(Use per unit mass analysis)
A. Refrigeration effect
B. COP
C. evaporator temperature
D. Temperature difference between evaporator and
compressor
D
If the pressure drop in the evaporator increases in a vapor compression cycle, which of the following will decrease?
(Use per unit mass analysis)
A. specific volume at suction
B. compressor power
C. heat rejected in the condenser
D. COP
D
By increasing the condenser pressure in vapor compression cycle, which of the following will increase? (Use per unit
mass analysis)
A. moisture content after expansion
B. compressor power
C. heat rejected from condenser
D. mass flow rate
A
If the pressure drop in the condenser increases in a vapor compression cycle, which of the following will decrease?
(Use per unit mass analysis)
A. Refrigeration effect
B. mass flow rate
C. heat rejected in the condenser
D. compressor power
B
By lowering the condenser pressure in Rankine cycle, which of the following will decrease? (Use per unit mass analysis)
A. pump work
B. turbine
C. heat rejected
D. cycle efficiency
C
By increasing the boiler pressure in Rankine cycle, which of the following will decrease? (Use per unit mass analysis)
A. heat rejected
B. pump work
C. cycle efficiency
D. moisture
A
If the pressure drop in the condenser Increases in a vapor compression cycle, which of the following will increase?
(Use per unit mass analysis)
A. mass flow rate
B. compressor power
C. heat rejected in the condenser
D. specific volume of suction
C
if the pressure drop in the condenser increases in a vapor compression cycle, which of the following will not be
affected? (Use per unit mass analysis)
A. compressor power
B. mass flow rate
C. heat rejection in the condenser
D. COP
A
