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NATE Light Commercial Refrigeration 2023 /Questions With Verified Answers Graded (A+)
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NATE Light Commercial Refrigeration 2023 /Questions With Verified Answers Graded (A+)
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NATE Light Commercial Refrigeration 2023/Questions With Verified Answers Graded (A+)
Quiz :What is the MOST important aspect about installing a rooftop package
unit? - √Answer :The roof will support the weight
Quiz :What could be at fault of an air cooled system that operates 50°F over
ambient temperature? - √Answer :An overcharge, air in the system, or air re-
circulating over the condenser
Quiz :Where should the sensing bulb on a TXV be located? - √Answer :As close
to the evaporator as possible on a horizontal line
Quiz :When a transformers secondary windings are wired in parallel, it is
important to wire them ____________ - √Answer :In phase with each other
Quiz :If a single phase compressor is cycling on its overload protector, what
should be checked? - √Answer :Voltage input, test capacitors, start relays, and
motor windings.
Quiz :What is the maximum pressure drop across an R-404A suction line filter
dryer? - √Answer :2 PSI (2 degree saturation temp)
Quiz :What type of maintenance do water cooled condensers require? -
√Answer :Clean the coil with scale remover and adjust the water valve
Quiz :If a CSR motor starts and operates with a high amperage, what could be
at fault? - √Answer :A faulty run capacitor
Quiz :What causes excessive head pressure on water cooled condensers? -
√Answer :Fouled condenser water, dirty water cooled condenser, over charge
and air trapped in the condenser
Quiz :What happens during a hot pull down? - √Answer :The refrigeration
system works hard and for low temperature systems a CPR (crankcase pressure
regulator) is used to prevent compressor overloading
Quiz :What will ice on the ceiling and floor of a walk-in freezer typically
indicate? - √Answer :A plugged drain line or a defective drain pan heater
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