HAC Vocabulary quiz 7

That length of straight tubing which has the same pressure drop as the fitting, valve or accessory (of the same nominal size) being considered.

• straight length

• same

• length

• equivalent length

What is evaporative cooling in HVAC?

• The cooling effect of condensation of a liquid in a moving air stream

• The cooling effect of vaporization of a liquid in a stationary air stream

• The cooling effect of vaporization of a liquid in a moving air stream

• The cooling effect of condensation of a liquid in a stationary air stream

What is an evaporator in HVAC?

• A device in which a liquid refrigerant is vaporized

• A device in which a gas refrigerant is vaporized

• A device in which a liquid refrigerant is condensed

• A device in which a gas refrigerant is condensed

What is evaporator superheat in HVAC?

• The actual temperature of the refrigerant liquid at the evaporator exit as compared to the saturated vapor temperature indicated by the suction pressure

• The actual temperature of the refrigerant liquid at the evaporator exit as compared to the saturated liquid temperature indicated by the suction pressure

• The actual temperature of the refrigerant vapor at the evaporator exit as compared to the saturated vapor temperature indicated by the suction pressure

• The actual temperature of the refrigerant vapor at the evaporator exit as compared to the saturated liquid temperature indicated by the suction pressure

What is external static pressure in HVAC?

• The sum of the dynamic and velocity pressures of a stationary air system at the point of measurement

• The sum of the dynamic and velocity pressures of a moving air system at the point of measurement

• The sum of the static and velocity pressures of a moving air system at the point of measurement

• The sum of the static and velocity pressures of a stationary air system at the point of measurement