REFRIGERATION AND AIR CONDITIONING QUIZ

The sensible heat factor during cooling and dehumidification process is given by (where h₁ = Enthalpy of air entering the cooling coil, h₂ = Enthalpy of air leaving the cooling coil, and hA = Enthalpy of air at the end of dehumidification process)

(h1 - h2)/ (hA - h2)

(hA - h1)/ (h2 - h1)

(hA - h2)/ (h1 - h2)

(h2 - hA)/ (h1 - h2)

TRUE ANSWER : ?
YOUR ANSWER : ?

The wet bulb temperature during sensible cooling of air

Decreases

Increases

Remains constant

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The horizontal and non-uniformly spaced lines on a psychrometric chart indicates

Dry bulb temperature

Wet bulb temperature

Specific humidity

Dew point temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

The lowest thermal diffusivity is of

Aluminium

Lead

Rubber

Iron

TRUE ANSWER : ?
YOUR ANSWER : ?

The relative coefficient of performance is equal to

(Actual C.O.P.) /(Theoretical C.O.P.)

None of these

(Actual C.O.P.) × (Theoretical C.O.P.)

(Theoretical C.O.P.)/ (Actual C.O.P.)

TRUE ANSWER : ?
YOUR ANSWER : ?

The bank of tubes at the back of domestic refrigerator is

Capillary tubes

Condenser tubes

Refrigerant cooling tubes

Evaporator tubes

TRUE ANSWER : ?
YOUR ANSWER : ?

Allowable pressure on high pressure side or ammonia absorption system is of the order of

Atmospheric pressure

56 bars

Slightly above atmospheric pressure

24 bars

TRUE ANSWER : ?
YOUR ANSWER : ?

The thermostatic expansion valve is used in ________ type of evaporators.

Dry

Flooded

None of these

DX coil

TRUE ANSWER : ?
YOUR ANSWER : ?

In chemical dehumidification process,

All of these

Wet bulb temperature decreases

Dry bulb temperature increases

Dew point temperature decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

The superheating in a refrigeration cycle

Decreases C.O.P.

Does not alter C.O.P.

Increases C.O.P.

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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