unit 4 quiz

Question 1

when transferring refrigerants from a cylinder to a refrigeration system or any other container, you should always wear ___
a. heavy protective clothing
b. rubber gloves
c. industrial steel toed shoes and an insulated cap
d. goggles with side shields and gloves

Answer 1

d. goggles with side shields and gloves

Question 2

a fusible plug is a metal fitting that has a hole drilled through it and the hole is filled with ___
a. material with low melting point
b. plastic
c. a metal alloy that will burn when overheated
d. copper fused with brass

Answer 2

a. material with low melting point

Question 3

when it is necessary to perform electrical work in an area that has a damp or wet floor, which of the following can be done to minimize the chance of electrical shock
a. wear insulated boots and gloves
b. place a rubber mat on the floor
c. use a wooden ladder
d. all of the above

Answer 3

d. all of the above

Question 4

in electrical circuits, the ___ wire protects the operator
a. grounding
b. live
c. control
d. neutral

Answer 4

a. grounding

Question 5

fires that involve ordinary materials such as paper, cardboard, and wood are classified as type ___ fires
a. A
b. B
c. C
d. D

Answer 5

a. A

Question 6

fire extinguishers that can be used on any type of fire, A, B, or C generally contain a ___ to extinguish the fire
a. nitrogen
b. carbon dioxide
c. dry chemical powder
d. water

Answer 6

c. dry chemical powder

Question 7

fires that involve electrical equipment are classified as type ___ fires
a. A
b. B
c. C
d. D

Answer 7

c. C

Question 8

electrical power should always be shut off at the ___ or entrance panel and locked out in an approved manner when installing equipment
a. distribution
b. local
c. remote
d. equipment

Answer 8

a. distribution

Question 9

fires that involve ordinary materials such as oil and gas are classified as type ___ fires
a. A
b. B
c. C
d. D

Answer 9

b. B

Question 10

an example of a pressure vessel is ___
a. a portable dolly
b. a cylinder containing refrigerant
c. a small ship containing refrigerant cylinders
d. the compressor in a refrigeration unit

Answer 10

b. a cylinder containing refrigerant

Question 11

which of the following statements is correct when referring to large refrigerant or nitrogen tanks
a. large tanks should not be carried, they should be secured to an approved cart
b. the protective cape must be on when the tank is not in use
c. safety goggles or glasses must be worn when moving the tank
d. all of the above are correct

Answer 11

d. all of the above are correct

Question 12

a double insulated drill ___
a. generally has a plastic case with electrical connections and motor insulated within the tool
b. is used with a three to two prong adapter
c. has rechargeable batteries
d. has two ground wires to insure proper grounding

Answer 12

a. generally has a plastic case with the electrical connections and motor insulated within the tool

Question 13

t/f when working in a machine room, safety glasses should not be worn because they can fog up and impede your eyesight

Answer 13

false

Question 14

t/f as long as the torch is kept moving below the level of the liquid refrigerant in the cylinder so as not to create a hotspot, it is ok to heat the cylinder in this manner

Answer 14

false

Question 15

t/f it is possible that your hand would suffer frostbite if it comes in contact with liquid r-22 when accidentally releasing refrigerant into the atmosphere

Answer 15

true

Question 16

t/f a necessary safety practice for a technician is to lockout the panel with a padlock and keep the key with you

Answer 16

true

Question 17

t/f to insure proper operation of an oxygen cylinder regulator, make sure no oil residue is present

Answer 17

true

Question 18

t/f aluminum ladders are safe to use around electrical equipment as long as they have insulation pads on the bottom of the rungs

Answer 18

false

Question 19

t/f if you are a refrigeration technician, a warm coat and gloves should be in your truck, even in the middle of the summer

Answer 19

true

Question 20

oil must never be used around a ___ cylinder

Answer 20

oxygen

Question 21

refrigerants from a refrigeration system that has a burned out motor compressor assembly can be dangerous because it could contain a high concentration of ___

Answer 21

acid

Question 22

a way to move equipment across a roof is to use rollers and ___ for a base

Answer 22

plywood

Question 23

power tools that are not double insulated must have three prong plugs to ensure that the tool is properly ___

Answer 23

grounded