Deck 4: General Safety Practices

Question 1

An example of a pressure vessel is ____.

A) a small ship containing refrigerant cylinders
B) the compressor in a refrigeration unit
C) a cylinder containing refrigerant
D) a portable dolly

Answer 1

C

Question 2

Fires that involve ordinary materials such as oil and gas are classified as Type __________ fires.

A) A
B) B
C) C
D) D

Answer 2

B

Question 3

A necessary safety practice for a technician is to lockout the panel with a padlock and keep the key with you.

Answer 3

True

Question 4

Fires that involve ordinary materials such as paper, cardboard, and wood are classified as Type __________ fires.

A) A
B) B
C) C
D) D

Question 5

A) 202.64
B) 226.61
C) 194.92
D) 145.71

Question 6

When working in a machine room, safety glasses should not be worn because they can fog up and impede your eyesight.

Question 7

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

A) The protective cap must be on when the tank is not in use.
B) Safety goggles or glasses must be worn when moving the tank.
C) Large tanks should not be carried, they should be secured to an approved cart.
D) All of the above are correct.

Question 8

A fusible plug is a metal fitting that has a hole drilled through it and the hole is filled with ____.

A) material with a low melting point
B) plastic
C) copper fused with brass
D) a metal alloy that will burn when overheated

Question 9

A double insulated drill ____.

A) has two ground wires to insure proper grounding
B) generally has a plastic case with the electrical connections and motor insulated within the tool
C) is used with a three- to two-prong adapter
D) has rechargeable batteries

Question 10

To insure proper operation of an oxygen cylinder regulator, make sure no oil residue is present.

Question 11

A) 255.7 psig
B) 259.9 psig
C) 267.0 psig
D) 271.5 psig

Question 12

Fires that involve electrical equipment are classified as Type _____ fires.

A) A
B) B
C) C
D) D

Question 13

Aluminum ladders are safe to use around electrical equipment as long as they have insulation pads on the bottom of the rungs.

Question 14

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.

Question 15

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) Place a rubber mat on the floor.
B) Use a wooden ladder.
C) Wear insulated boots and gloves.
D) All of the above

Question 16

When transferring refrigerants from a cylinder to a refrigeration system or any other container, you should always wear ____.

A) goggles with side shields and gloves
B) heavy protective clothing
C) rubber gloves
D) industrial steel-toed shoes and an insulated cap

Question 17

Fire extinguishers that can be used on any type of fire, A, B, or C generally contain a _____ to extinguish the fire.

A) water
B) carbon dioxide
C) nitrogen
D) dry chemical powder

Question 18

In electrical circuits, the _____ wire protects the operator.

A) live
B) control
C) grounding
D) neutral

Question 19

Electrical power should always be shut off at the _____ or entrance panel and locked out in an approved manner when installing equipment.

A) equipment
B) local
C) distribution
D) remote

Question 20

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 (an illegal procedure).

Question 21

When turning off the electrical power at a disconnect panel to work on an electrical circuit, what should you do to ensure that no one will turn the power on until you have finished and are ready?

Question 22

Oil must never be used around a(n) ____________________ cylinder.

Question 23

If a large pressurized tank falls over and the stem breaks off, why shouldn't you try to stand up the tank?

Question 24

Why is a regulator required on a nitrogen cylinder?

Question 25

Why should a technician not wear jewelry and metallic watches while working on a system?

Question 26

A way to move equipment across a roof is to use rollers and ____________________ for a base.

Question 27

If you are a refrigeration technician, a warm coat and gloves should be in your truck, even in the middle of the summer.

Question 28

Why should a ground fault interrupter be used with portable electric tools?

Question 29

What safety precaution is required before starting an electric motor?

Question 30

Refrigerants from a refrigeration system that has a burned out motor-compressor assembly can be dangerous because it could contain a high concentration of ____________________.

Question 31

Power tools that are not double insulated must have three-prong plugs to ensure that the tool is properly ____________________.