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Exam 7: Specialized Hvacr Tools

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Question 21

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The center hose on a two-valve manifold is color-coded __________. List the four pieces of equipment to which this hose can be connected.

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yellow a vacuum pump for syste...

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Question 22

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The stem thermometer is used to measure the temperature of __________.

A) the occupied space
B) the temperature of air in a duct system
C) a and b
D) neither a nor b

E) All of the above
F) B) and C)

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Question 23

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In order to ensure that the air conditioning system is properly charged, accurate pressure and temperature readings must be obtained, not only from the system itself, but also from __________.

The VOM is used to measure what four aspects of the electrics circuits in the air conditioning, heating or refrigeration system?

When laying out a sheet metal duct section, various tools are used to mark the metal prior to cutting. __________ are used to scratch straight lines on the metal. __________ are used to scratch arced lines and circles on the metal. __________ can be used to scratch freeform and straight lines on the metal surface.

POE lubricants are compatible with AB or mineral oils.

The technician should always use a __________ when adding refrigerant to, or removing refrigerant from a system, as proper record keeping regarding refrigerant quantities added to, removed from, or leaking from systems is vital.

Sheet metal hammers are easily identified as they have __________ heads and __________ edges.

Match the tin snip to the color code that indicates the snip's intended purpose.

The micron gauge is used to measure the level of vacuum reached during the evacuation process.

The refrigeration service wrench is used to turn __________ stems on system valves and tanks. Using this tool on such stems helps ensure that the stems do not get __________.

Explain why it is important to investigate the uses and limitations of each type of thermometer before selecting the instrument to be used.

The electronic leak detector uses a pump to pull air samples into the unit and test them for traces of __________.

Two common configurations of gauge manifolds are the two-valve manifold and the four-valve manifold. The valves are __________ when turned counter-clockwise and __________ when turned clockwise.

__________ is the term used to describe a complete path between two points in an electric circuit.

The center port on a four-valve manifold is marked VAC and is used for __________.

The process of containing refrigerant that is removed from systems is called __________.

Match the tin snip to the color code that indicates the snip's intended purpose.

It is illegal to intentionally release refrigerant from air conditioning or refrigeration systems to the atmosphere.

The vacuum pump is used to evacuate air conditioning and refrigeration systems. The process of evacuation involves the __________ and __________ of the system. Degassing involves the removal of air, nitrogen and other __________ from the system, while dehydration involves the removal of __________ from the system.