Final

Question 1

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

Answer 1

False

Question 2

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

Answer 2

False

Question 3

The compound gauge manifold measures pressures above and below atmospheric pressures

Answer 3

True

Question 4

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

Answer 4

True

Question 5

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

Answer 5

Micron gauge

Question 6

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

Answer 6

False

Question 7

A reamer is used to remove____ from copper tubing before joining

Answer 7

Bured and sharp edges

Question 8

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

Answer 8

False

Question 9

Air entering a refrigeration system can eventually lead to compressor failure

Answer 9

True

Question 10

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

Answer 10

Recovery machine

Question 11

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

Answer 11

False

Question 12

The use of flux is always required when soldering or brazing

Answer 12

False

Question 13

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

Answer 13

True

Question 14

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

Answer 14

500 microns

Question 15

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

Answer 15

Sliver

Question 16

When cutting copper tubing the best tool to use is?

Answer 16

Tubing cutting

Question 17

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

Answer 17

CPVC

Question 18

All copper tubing must be cleaned with?

Answer 18

Sand cloth

Question 19

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

Answer 19

Refrigerant and oil

Question 20

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

Answer 20

10 PSI

Question 21

The depth of a swage joint should be?

Answer 21

The same depth as the outside diameter

Question 22

Soft soldering is performed at temperatures below?

Answer 22

500 degrees

Question 23

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

Answer 23

False

Question 24

Copper tubing should always be__________ before joining

Answer 24

Reamed and cleaned

Question 25

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

Answer 25

Swaging

Question 26

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

Answer 26

False

Question 27

Caused by excessive bending and straightening of tubing

Answer 27

Work hardening

Question 28

A vacuum pump removes_______and______from the refrigeration system.

Answer 28

Moisture and non-condensables

Question 29

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

Answer 29

Shrader valve cores

Question 30

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

Answer 30

Lock out tag out

Question 31

The best tool to use to remove hex head refrigerant caps

Answer 31

Adjustable wrench

Question 32

The following tools are used for finding refrigerant leaks

Answer 32

Ultra sonic,electronic, bubble solution,ultra violet dye

Question 33

_____ should be purged through copper tubing during brazing

Answer 33

Dry nitrogen

Question 34

A U-Tube manometer give its reading in?

Answer 34

Inches of water column

Question 35

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

Answer 35

The protective cap must be on when not in use.

Question 36

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

Answer 36

Capillary action

Question 37

A gauge manifold assembly used in refrigeration work may include?

Answer 37

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

Question 38

Represents the lowest vacuum

Answer 38

1000 microns

Question 39

The best tool to test refrigerant pressure?

Answer 39

Compound gauge manifold set

Question 40

Non-condesable gases____

Answer 40

Are un-desirable in refrigeration systems

Question 41

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

Answer 41

Annealing

Question 42

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

Answer 42

Dry nitrogen

Question 43

The proper tools to bend copper tubing are?

Answer 43

Ratchet style crossbow bender, spring bender and lever tubing bender

Question 44

3 types of copper tubing used in our industry are?

Answer 44

K, ACR and L

Question 45

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

Answer 45

Safety glasses, gloves and non-conductive sole footwear

Question 46

The following tools can be used to measure inlet gas pressures

Answer 46

U Tube manometer, incline manometer and digital manometer