REFRIGERATION AND AIR CONDITIONING QUIZ

Increases heat transfer rate

Results in loss of heat due to poor heat transfer

Can be avoided by proper design

Is immaterial

1 - (1/C.O.P)

1 + C.O.P

1 - C.O.P.

1 + (1/C.O.P)

Sub-cooled liquid

Liquid

Saturated liquid

Wet vapour

1.25

2.15

5.12

1

1/ B.P.F.

1 - B.P.F.

1 + B.P.F.

P.F. - 1

R-12

R-11

Ammonia

R-22

Increases C.O.P.

Decreases C.O.P.

Does not alter C.O.P.

None of these

One heat exchanger

Four heat exchangers

Three heat exchangers

Two heat exchangers

80 kcal/ hr

50 kcal/ hr

50 kcal/ min

80 kcal/ min

Relative

Absolute

None of these

Specific