REFRIGERATION AND AIR CONDITIONING QUIZ

100 kJ/kg

125 kJ/kg

25 kJ/kg

50 kJ/kg

(e₁ + e₂)/ e₁ + e₂ - e₁e₂

1/e₁ + 1/e₂

e₁ + e₂

e₁e₂

NN = V²/t.cp

NN = μ cp/k

NN = ρ V l /μ

NN = hl/k

Any value

Zero

As low as possible (3 to 11°C)

High, of the order of 25°

Between compressor and condenser

Between condenser and evaporator

Before expansion valve

In evaporator

Pressure lines

Total heat lines

Temperature lines

Entropy lines

6

1.2

0.2

5

High total heat

Low latent heat

High sensible heat

High latent heat

Water will never evaporate

A gas will immediately liquefy

Water will evaporate

A gas will never liquefy

It permits higher speeds to be used

It results in high volumetric and mechanical efficiency

It permits complete evaporation in the evaporator

All of these