REFRIGERATION OBJECTIVE QUESTIONS

REFRIGERATION OBJECTIVE QUESTIONS

1. A REFRIGERATION SYSTEM

A. REMOVES HEAT FROM A LOW TEMPERATURE BODY AND DELIVERS IT TO HIGH TEMPERATURE BODY
B. REMOVES HEAT FROM A HIGH TEMPERATURE BODY AND DELIVERS IT TO LOW TEMPERATURE BODY
C. REJECTS ENERGY TO A LOW TEMPERATURE BODY
D. NONE OF THE ABOVE

2. RELATIVE COEFFICIENT OF PERFORMANCE IS

A. THEORETICAL COP/ACTUAL COP
B. ACTUAL COP/THEORETICAL COP
C. ACTUAL COP*THEORETICAL COP
D. NONE OF THESE

3. THE CAPACITY OF A DOMESTIC REFRIGERATOR IS IN THE RANGE OF

A. 0. TO 0.3 TR
B. 1 TO 3 TR
C. 3 TO 5 TR
D. 5 TO 7 TR

4. WHEN THE LOWER TEMPERATURE OF A REFRIGERATING MACHINE IS FIXED THEN COP CAN BE IMPROVED BY

A. OPERATING  MACHINE AT HIGHER SPEEDS
B. OPERATING MACHINE AT LOWER SPEEDS
C. RAISING THE HIGHER TEMPERATURE
D. LOWERING THE HIGHER TEMPERATURE

5. AIR REFRIGERATION  WORKS ON

A. REVERSED CARNOT CYCLE
B. BELL COLEMAN CYCLE
C. BOTH A & B
D. STIRLING CYCLE

6. AIR REFRIGERATION IS USED IN

A. COMMERCIAL REFRIGERATORS
B. DOMESTIC REFRIGERATION
C. AIR CONDITIONING
D. GAS LIQUEFICATION

7. DURING REFRIGERATION HEAT IS REJECTED BY REFRIGERANT IN A

A. COMPRESSOR
B. CONDENSER
C. EVAPORATOR
D. EXPANSION VALVE

8. IN A VAPOUR COMPRESSOION SYSTEM THE CONDITION OF THE REFRIGERANT BEFORE PASSING THROUGH THE CONDENSER IS

A. HIGH PRESSURE SATURATED LIQUID
B. WET VAPOUR
C. DRY SATURATED VAPOUR
D. SUPERHEATED VAPOUR

9. THE FORMATION OF FROST ON COOLING COIL IN A REFRIGERATOR

A. INCREASES HEAT TRANSFER
B. IMPROVES COP OF THE SYSTEM
C. INCREASES POWER CONSUMPTION
D. REDUCES POWER CONSUMPTION

10. IN A PRESSURE ENTHALPY CHART THE SPACE TO THE LEFT OF THE SATURATED LIQUID LINE REPRESENTS

A. WET VAPOUR REGION
B. SUPERHEATED VAPOUR REGION
C. SUB COOLED REGION
D. DEGREE OF SUPERHEAT