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RETA CARO Test 1 Questions & Answers
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RETA CARO Test 1 Questions & Answers
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Reta Test 11.what does temperature indicate: intensity of heat energy in an object
2.what is required to move heat from one object to another: temperature difference
3.which of these is required to obtain a valid reading from a pressure temperature chart: the refrigerant must be in a saturated
condition
4.which of these is an essential component of a mechanical refrigeration system: expansion device
5.what is a function of a compressor in a mechanical refrigeration system: to accept vapor from the evaporator and compress it to increase its pressure and temperature
6.which of these accurately describes subcooled liquid: liquid cooled below at saturation pressure
7.what does the term compression ratio refer to: the ratio of discharge pres- sure to suction pressure in PSIA
8.which refrigerant is more forgiving to moisture in the refrigeration system-
: R-717
9.which of these is most likely to occur when air leaks into a
refrigeration system: an increase in compressor discharge pressure
10.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: rupture of the line if the liquid
warms
11.under what conditions do halocarbon refrigerants become most haz-
ardous: when did we come in contact with an open flame
12.which of these conditions is indicated in an ammonia condenser operat- ing with 180 PSIG pressure at the drain outlet and 90 degrees Fahrenheit liquid temperature leaving the condenser: non condensables in the condenser
13.What Will Liquid refrigerant trap in a pipe do when heated: expand
14.which industrial compressor would be direct drive at 3600 RPM: screw compressor
15.why is the discharge temperature of a screw compressor lower than the
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