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refer test
| Question | Answer |
|---|---|
| the definition of superheat | the heat required to raise the temperature of 1 pound of liquid. |
| a thermostatic expansion valve (txv) is designed to maintain. | Constant flow |
| the contacts and coil of a relay must always operate at the same voltage level | |
| liquid refrigerant can cause damage to a compressor because | liquid refrigerant damages motor windings |
| as a pressure on a liquids is reduced, the temperature at which the liquid will boil. | decrease |
| a thermistor is a electrical device, which changes resistance in response to a change in | temperature |
| electrical loads are devices which | change electrical energy into another form of energy |
| which meter is connected in a parallel to a live circuit? | voltmeter |
| when using an ohmmeter you must. | test the component under operating conditions |
| the heat that causes a change of state in a substance is | latent heat |
| which of the following is correct regarding charging liquids refrigerant into a evacuated system | charge through the manual liquid line valve |
| the best way to remove refrigerant from a refrigeration system is | |
| which instrument would you use when evacuating and dehydrating a refrigeration system | a compound pressure gauge |
| which gas would you use to raise system pressure for leak testing | dry nitrogen |
| do not use -----when heating the refrigerant cylinder to accelerate charging | Torch |
| on a refrigeration compressor, the site glass shows excessive foaming of the oil after the system is stabilized. there may be | excessive oil level in the compressor crankcase. |
| when evacuating and dehydrating a refrigeration system, you should | |
| before replacing a defective compressor the ------- should be determined. | cause of the failure |
| the majority of heat removed from cargo during cooling is absorbed by the refrigerant in the evaporator as | latent heat |
| technician A says r-22 can be added to the system as a liquid, tech B say r-22 can be added to the system as vapor. which of the following statements is most correct? | it depend on the capacity |
| when you energize the coil of a relay, the normally open contact will close and the normally closed contacts will open | true |
| A possible cause of a frosted filter-drier is | low ambient temp |
| Before attempting to remove a compressor cylinder head, you must first | make sure there is no pressure in the hole system |
| the normal position for the service valves in a running refrigeration system is | back seated |
| electric solenoid valves may not operate properly when | there installed incorrectly |
Created by:
Kenadams
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