AC/R

Question 1

What signals a refrigerant system compressor to kick off?

Answer 1

The signal comes from low pressure side

Question 2

Change of state from a solid to a vapor without passing through the liquid state is called

Answer 2

Sublimation

Question 3

When can re-heaters be used and what for

Answer 3

Re-heaters are duct heaters that raise the temperature of the preheated supply or recirculation

Question 4

What is zone ventilation

Answer 4

The use of a single re-heater or cooling coil to serve a group of spaces each of which approximately has the same exposures, use, current load variations, and delivery air temperature requirements

Question 5

Wet and dry bulb temps are used to determine

Answer 5

Humidity

Question 6

Boiler blowdowns are done daily or when the total dissolved solids exceed

Answer 6

1000PPM

Question 7

Normal evaporator plant operating temp

Answer 7

170-175F

Question 8

Air delivered to spaces via air handlers is measured in what

Answer 8

CFM

Question 9

What state is the refrigerant in an AC/R system when it is in a liquid and gas form in the same space

Answer 9

Saturated vapor