what does temperature indicate - ANSWER-intensity of heat energy in an object
what is required to move heat from one object to another - ANSWER-temperature difference
which of these is required to obtain a valid reading from a pressure temperature chart - ANSWER-the refrigerant must be in a s...
Reta Test 1 Questions &
Answers 100% Correct!!
what does temperature indicate - ANSWER-intensity of heat energy in an object
what is required to move heat from one object to another - ANSWER-temperature difference
which of these is required to obtain a valid reading from a pressure temperature chart - ANSWER-the
refrigerant must be in a saturated condition
which of these is an essential component of a mechanical refrigeration system - ANSWER-expansion
device
what is a function of a compressor in a mechanical refrigeration system - ANSWER-to accept vapor
from the evaporator and compress it to increase its pressure and temperature
which refrigerant is more forgiving to moisture in the refrigeration system - ANSWER-R-717
which of these is most likely to occur when air leaks into a refrigeration system - ANSWER-an
increase in compressor discharge pressure
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 refrigeration system - ANSWER-rupture
of the line if the liquid warms
under what conditions do halocarbon refrigerants become most hazardous - ANSWER-when did we
come in contact with an open flame
which of these conditions 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
, What Will Liquid refrigerant trap in a pipe do when heated - ANSWER-expand
which industrial compressor would be direct drive at 3600 RPM - ANSWER-screw compressor
why is the discharge temperature of a screw compressor lower than the discharge temperature of a
reciprocating compressor - ANSWER-significant quantities of oil flow into the rotor section of a screw
compressor
how does the intercooler help the low stage compressor and high stage compressor - ANSWER-by d
superheating low stage compressor discharge temperature
which of these accurately describes subcooled liquid - ANSWER-liquid cooled below at saturation
pressure
what does the term compression ratio refer to - ANSWER-the ratio of discharge pressure to suction
pressure in PSIA
which of these is the primary responsibility of a refrigeration system operator - ANSWER-to track
system operations in logs and maintenance records
which of these functions are required by the operator to complete logs properly - ANSWER-Monitor
and record system temperatures, pressures levels and product temperatures.
which of these should be done first when a reciprocating compressor starts to pound or makes an
unusual loud noise. - ANSWER-turn off the compressor.
which of these most accurately describes when hydraulic pounding in a reciprocating compressor is
taking place. - ANSWER-when liquid refrigerant enters the compression chamber.
which statement most accurately describes characteristics of a reciprocating compressor in a
refrigeration system. - ANSWER-heat of compression maintains oil temperature whenever the
compressor is on.
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