Refrigeration 3

Latent heat is that required to:

• bring a substance to boiling point

• bring a substance to freezing point

• none of these

Which of the following is true?

• sensible heat is always greater than latent heat

• latent is usually higher than sensible heat

• sensible heat is always the same as latent heat

• latent heat will always be greater than sensible heat

How much superheat can gauges measure?

• only up to 5˚C

• only superheat that is over the saturation point

• only superheat between the evaporator and compressor

• none of these

The definition of subcooling is:

• any cooling that occurs inside the cooling space

• any cooling that occurs below the saturation point

• cooling that occurs in the low pressure zone

• none of these

If you convert 0˚C to Kelvins, what do you get?

• 101.3K

• 0K

• -273K

• 273K

How do you convert 150kpag to kpaa?

• 150 kpaa (approx.)

• 100 kpaa (approx.)

• 250 kpaa (approx.)

• 50 kpaa (approx.)

In what position is the valve shaft in this image?

• back seated valve

• front seated valve

• mid seated valve

• cracked of the back seat

In what position is the valve shaft in this image?

• back seated valve

• front seated valve

• mid seated valve

• cracked of the back seat

In what position is the valve shaft in this image?

• back seated valve

• front seated valve

• mid seated valve

• cracked of the back seat

In what position is the valve shaft in this image?

• back seated valve

• front seated valve

• mid seated valve

• cracked of the back seat