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Quiz :what does temperature indicate - Answer :intensity of heat
energy in an object
Quiz :what is required to move heat from one object to another -
Answer :temperature diff erence
Quiz :which of these is required to obtain a valid reading from a
pressure temperature chart - Answer :the refrigerant must be in a
saturated conditi on
Quiz :which of these is an essenti al component of a mechanical
refrigerati on system - Answer :expansion device
Quiz :what is a function of a compressor in a mechanical refrigerati on
system - Answer :to accept vapor from the evaporator and compress
it to increase its pressure and temperature
Quiz :which of these accurately describes subcooled liquid -
Answer :liquid cooled below at saturation pressure
Quiz :what does the term compression ratio refer to - Answer :the
rati o of discharge pressure to suction pressure in PSIA
Quiz :which refrigerant is more forgiving to moisture in the
refrigerati on system - Answer :R-717
, Quiz :which of these is most likely to occur when air leaks into a
refrigerati on system - Answer :an increase in compressor discharge
pressure
Quiz :which of these is the greatest risk from closing valves on each
end of a liquid line between a liquid pump and an evaporator during
maintenance of an ammonia refrigerati on system - Answer :rupture
of the line if the liquid warms
Quiz :under what conditi ons do halocarbon refrigerants become most
hazardous - Answer :when did we come in contact with an open
fl ame
Quiz :which of these conditi ons is indicated in an ammonia condenser
operating with 180 PSIG pressure at the drain outlet and 90 degrees
Fahrenheit liquid temperature leaving the condenser - Answer :non
condensables in the condenser
Quiz :What Will Liquid refrigerant trap in a pipe do when heated -
Answer :expand
Quiz :which industrial compressor would be direct drive at 3600 RPM
- Answer :screw compressor
Quiz :why is the discharge temperature of a screw compressor lower
than the discharge temperature of a reciprocati ng compressor -
Answer :signifi cant quanti ti es of oil fl ow into the rotor secti on of a
screw compressor