NATE ICE Flashcards Questions with Certified Answers Graded A+
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Course
Nate commercial
Institution
Nate Commercial
After a vacuum pump has been used, a continuous pressure rise in the system most likely indicates - Answer: existence of a leak
after a vacuum has been pulled to 500 microns, a pressure rise in the system, followed by a leveling-off at 1500 microns, most likely indicates the - Answer: presence...
, After a vacuum pump has been used, a continuous pressure rise in the system most likely indicates -
Answer: existence of a leak
after a vacuum has been pulled to 500 microns, a pressure rise in the system, followed by a leveling-off
at 1500 microns, most likely indicates the - Answer: presence of a moisture
on initial start up of an air conditioning system, the temperature drop measured across the evaporator
coil exceeds manufacturer's specifications. this condition most likely indicates - Answer: lack of
refrigerant charge
the technician is on a spring maintenance check of an air conditioning system. they find the following -
head pressure is higher than normal, suction pressure higher than normal, superheat 0 degrees,
condenser is clean, outdoor fan operation is normal, subcooling is 25 degrees. which of the following is
most likely the problem? - Answer: non-condensibles in the system
in a compressor, the internal overload senses the winding temperature and - Answer: amperage in the
compressor circuit
the function of an external equalizer line for a thermostatic expansion valve is to - Answer: reference
the pressure at the evaporator outlet
in a fixed orifice air conditioning system, the presence of non-condensables in the system will cause - -
Answer: high head and high suction pressures
which one of the following could possibly cause a noisy reciprocating compressor? - Answer: broken
internal springs
two places where superheating occurs in a system are the - Answer: evaporating coil and the
compressor
if the fan switch on a thermostat sub-base is set to ON and the blower motor is cycling on and off, the
most probable cause is - - Answer: motor overload
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