Exam 1 6090 F + F

what is the name of the condenser that uses both air and water a coolant?

• shell and coil

• shell and tube

• double tube

• evaporative

what is the name given to the valves inside a reciprocating compressor head?

• pressure relief valves

• head valves

• shut-off valves

• read valves

how does the direct expansion evaporator change liquid refrigerant to vapour?

• by absorbing sensible heat

• by rejecting sensible heat

• by absorbing latent heat

• by rejecting latent heat

what type of condenser operates with the highest condensing temperature?

• forced convection

• natural convection

• water cooled

• Evaporative

what does the clear liquid line sight glass indicate about the condition of the refrigerant?

• it is a sub-cooled liquid

• it is a superheated liquid

• it is a saturated two phase mixture

• it is a saturated liquid and superheated vapour

how does evaporating temperature impact on cooling capacity?

• increasing evaporator temperature decreases cooling capacity

• increasing evaporator temperature increases cooling capacity

• maintaining constant evaporating temperature decreases cooling capacity

• maintaining constant evaporating temperature increases cooling capacity

which of the following is a reasonable condensing temperature difference for a RAC system using an air cooled condenser?

• 6K

• 10K

• 15K

• 26K

what does the expansion line of a Split air-conditioning unit taking refrigerant from the outdoor unit to the indoor unit contain?

• high-pressure sub-cooled liquid

• high-pressure saturated mixture

• low-pressure subcooled liquid

• low-pressure saturated mixture

what is the effect of excessively wide temperature difference in the fresh fruit and vegetable store?

• product quality will not be affected

• product will become soggy

• product will dry out

• product will be frozen

which of the following refrigerants has the highest GWP?

• R134A

• R22

• R404a

• R717