NATE AC EXAM BUNDLE 2024!!

A good evacuation of a refrigerant circuit to remove non-condensables will help insure: A.) higher condensing temperatures B.) higher suction pressures C.) low suction line pressure drop D.) higher efficiency and capacity - ANSWERD.) higher efficiency and capacity A condensing unit should be ...

Low airflow over a residential split system air conditioning evaporator can cause A: Liquid flood-back to the compressor B: A decrease in compression ratio C: An increase in suction line superheat D: Oil logging in the evaporator - ANSWERA: Liquid flood-back to the compressor W...

A system is supplied from the factory with a charge of 5 pounds 10 ounces for a 15 foot line set. The line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added for each added foot of refrigerant line set length. What is the total refrigerant ...

The part of an air conditioning system that changes the refrigerant from a low-pressure gas to a high-pressure gas is the: - ANSWERcompressor The part of an air conditioning system that changes the refrigerant from a high-pressure gas to a high-pressure liquid is the: - ANSWERcondenser The par...

A suction line accumulator should be used in a residential heating pump only when recommended by the manufacturer if: a. Long refrigerant lines increase system charge over recommended maximum charge b. added oil dilution is required to maintain proper lubrication c. the system has low vapo...

Ch. 1-1 The ability to utilize all types of communication skills is ________ to the HVACR technician. a) not as important as "hands-on" technical skills b) somewhat important c) unimportant d) very important - ANSWERd) very important Ch. 1-2 It is important to be _______ in filling out...

A technician has determined a supply in a flexible duct system is leaking. What should be checked? - ANSWERAll connections inner and outer layers. Electronic air cleaners can operate with internal voltages as high as? - ANSWER5000v Why do some electromechanical type thermostats require connect...

During an annual service check up, it is discovered that there is a moderate amount of resistance on a "bellyband" crankcase heater. What does this condition indicate? A. the crankcase heater will operate B. the crankcase heater will not operate C. the crankcase heater is open D. the cra...

What are the symptoms of a TXV air conditioning system if it has lost its charge: - ANSWERThe superheat will increase and the low-side pressure will decrease A customer who owns a split air conditioning system complains that his system has been running but his house doesn't seem to be cooling ...

The Fahrenheit scale is based on boiling water at sea level at what temperature? A: 459 degrees B: 212 degrees C: 180 degrees D: 100 degrees - ANSWERB: 212 degrees Zero pounds gauge corresponds on the absolute scale to: A: 144 B: 212 C: 14.7 D: zero - ANSWE...