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Final Test! > Final > Flashcards

Final Flashcards

1
Q

Lock out tag is used to keep children out of the air conditioner.

A

False

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2
Q

The safest way to light and oxy/acetylene torch is with a butane lighter

A

False

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3
Q

The compound gauge manifold measures pressures above and below atmospheric pressures

A

True

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4
Q

While climbing a ladder 3 points of contact should be maintained at all times

A

True

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5
Q

The device used to measure the level of vacuum in a refrigerator system

A

Micron gauge

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6
Q

Light oil can be used to lubricate the treads on an oxygen regulator

A

False

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7
Q

A reamer is used to remove____ from copper tubing before joining

A

Bured and sharp edges

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8
Q

When soldering, the technician should heat the solder with the torch to allow it to melt

A

False

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9
Q

Air entering a refrigeration system can eventually lead to compressor failure

A

True

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10
Q

The equipment that is used to remove refrigerant from the system prior to servicing or disposal

A

Recovery machine

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11
Q

Oxy/Acetylene bottles can be transported laying down provided they are properly secured

A

False

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12
Q

The use of flux is always required when soldering or brazing

A

False

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13
Q

A “hacksaw” blade has a proper direction that it should be installed for proper use

A

True

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14
Q

The industry standard for vacuum level before recharging a refrigeration system is

A

500 microns

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15
Q

The solder most commonly used in our industry usually contains a small amount of

A

Sliver

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16
Q

When cutting copper tubing the best tool to use is?

A

Tubing cutting

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17
Q

The piping that uses a solvent joint that is used for hot and cold fluids

A

CPVC

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18
Q

All copper tubing must be cleaned with?

A

Sand cloth

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19
Q

The only thing that should be sealed in a refrigerant system?

A

Refrigerant and oil

20
Q

When setting up a oxy/acetylene torch the max regulator pressure setting is?

A

10 PSI

21
Q

The depth of a swage joint should be?

A

The same depth as the outside diameter

22
Q

Soft soldering is performed at temperatures below?

A

500 degrees

23
Q

A water manometer is used to test the level of the vacuum in refrigeration system?

A

False

24
Q

Copper tubing should always be__________ before joining

A

Reamed and cleaned

25
Q

The process/operation that allows 2 tubes of equal diameter to be joined together.

A

Swaging

26
Q

It is okay to wear watches/jewelry of any kind when working on mechanical/electrical devices

A

False

27
Q

Caused by excessive bending and straightening of tubing

A

Work hardening

28
Q

A vacuum pump removes_______and______from the refrigeration system.

A

Moisture and non-condensables

29
Q

This should be removed prior evacuating the refrigeration system to speed the process

A

Shrader valve cores

30
Q

_____ should be performed to prevent someone from turning the power on to a system while being serviced to prevent electrical shock

A

Lock out tag out

31
Q

The best tool to use to remove hex head refrigerant caps

A

Adjustable wrench

32
Q

The following tools are used for finding refrigerant leaks

A

Ultra sonic,electronic, bubble solution,ultra violet dye

33
Q

_____ should be purged through copper tubing during brazing

A

Dry nitrogen

34
Q

A U-Tube manometer give its reading in?

A

Inches of water column

35
Q

Which of the following is true when referring to large refrigerant or nitrogen tanks?

A

The protective cap must be on when not in use.

36
Q

Molten solder flows between the 2 base metals being soldered because of

A

Capillary action

37
Q

A gauge manifold assembly used in refrigeration work may include?

A

Compound gauge,standard gauge ,manifold, valves/hoses, 2 or 4 valves, 4 way shutoff valve design using a shutoff valve for each hose, a digital readout that includes superheat and subcool valves

38
Q

Represents the lowest vacuum

A

1000 microns

39
Q

The best tool to test refrigerant pressure?

A

Compound gauge manifold set

40
Q

Non-condesable gases____

A

Are un-desirable in refrigeration systems

41
Q

Operation of heating and cooling tubing to make it softer for bending

A

Annealing

42
Q

When testing for leaks in refrigerant system the best gas to use is?

A

Dry nitrogen

43
Q

The proper tools to bend copper tubing are?

A

Ratchet style crossbow bender, spring bender and lever tubing bender

44
Q

3 types of copper tubing used in our industry are?

A

K, ACR and L

45
Q

The recommended PPE to be used when servicing HVAC equipment is?

A

Safety glasses, gloves and non-conductive sole footwear

46
Q

The following tools can be used to measure inlet gas pressures

A

U Tube manometer, incline manometer and digital manometer

Final Test! (1 decks)

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