Unit 4: Plant & Fire Safety

Question 1

What level of noise exposure should hearing protection started to be worn?

Answer 1

When sound pressure levels are 80 dB or louder

Question 2

Why should you not paint protective headwear?

Answer 2

It can weaken the headwear

Question 3

Arc Flash

Answer 3

is a type of electrical explosion that occurs when electrical energy passes from a high voltage source through the air to a low voltage conductor

Question 4

PPE

Answer 4

Personal Protective Equipment

Question 5

SDS

Answer 5

Safety Data Sheet: is prepared by manufacturer of product and provides a detailed description of the hazardous materials inside of a product.

Question 6

When is fall protection required?

Answer 6

When a worker may fall 3 meters or more or when there is unusual risk of injury if a worker falls less than 3 meters.

Question 7

Filter type Respirators

Answer 7

Protect against dusts, mists, toxic dusts,

Question 8

SCBA

Answer 8

Self Contained Breathing Apparatus

Question 9

SAR

Answer 9

Supplied Air Respirator

Question 10

OH&S

Answer 10

Occupational Health & Safety Programs: a plan of action to prevent work related accidents, respond to emergencies, and identify/control hazards

Question 11

CSE

Answer 11

Confined Space Entry: are enclosed or partially enclosed spaces that is not intended for human occupancy except for work orders, and may become dangerous to any person entering.

Question 12

WHMIS

Answer 12

Workplace Hazardous Materials Information System

Question 13

Key Components of WHMIS?

Answer 13

1) Hazard Classifications
2) Labelling Requirements
3) Safety Data Sheets provided by manufacturers
4) Worker Training programs

Question 14

What are Safe Work Permits?

Answer 14

Is a written agreement between the worker and the company representative issuing the permit. They are designed to ensure potentially hazardous work can be carried out safely. Both the worker and rep look over the SWPs terms and will sign off on the terms if agreeable; at this point it becomes a legal document.

Elements of a SWP can include:

1) Lockout requirements
2) Atmospheric testing
3) PPE requirements
4) Additional Permits Required (Confined Space/Hot Work)

Question 15

What is Cold Work Permit?

Answer 15

For general maintenance that does not generate an ignition source. No fire hazards present. May be required under a safe work permit

Question 16

What is a Hot Work Permit?

Answer 16

Any work that produces a fire hazard or ignition source (welding, electric drills, camera flashes)

Question 17

CSE Permit

Answer 17

Confined Space Entry Permit

Question 18

What type of employee training does WHMIS require?

Answer 18

Safe use of materials on site
proper labeling
Proper use of PPE
Location of safety equipment 
Location of SDS

Question 19

Safe Handling of Gas Cylinders?

Answer 19

Do not drop
Do not Roll
Keep metal cap on to protect valve
Keep cylinder up right

Question 20

Where to Keep Gas Cylinders?

Answer 20

Keep outside when possible

Question 21

Flash Point

Answer 21

is the lowest temperature at which a liquid such as hydrocarbon fluids produces sufficient vapor to form a flammable mixture of vapor and air, immediately above the liquid’s surface.

Question 22

What is Combustion?

Answer 22

Combustion is defined as an exothermic reaction (Gives off heat). This self-sustaining reaction involves a solid, liquid or gaseous fuel.

Question 23

Oxidizing Agent

Answer 23

Anything the provides oxygen to combustion or chemical reaction

Question 24

reducing agent

Answer 24

Is any combustible material. A reducing agent is an element or compound that loses or “donates” an electron to an electron recipient in a redox chemical reaction. Such as fuels that give up electrons during combustion.

Question 25

Four Components Required for a fire?

Answer 25

1) Fuel (reducing agent)
2) Oxygen (Oxidizing agent)
3) Ignition (Heat or certain temperature that allows for combustion to occur)
4) Self-Sustaining Chain reaction

In order to extinguish a fire you only have to remove one of those aspects

Question 26

How to REACT to a fire?

Answer 26

Remove people from immediate danger
Ensure doors are closed
Activate the alarm 
Call the fire department 
Try to extinguish the fire (only if safe to do so)

Question 27

Class A Fire

Answer 27

Consist of ordinary combustible materials such as:

1) Wood
2) Cloth
3) Paper
4) Plastics
5) rubber

Question 28

Class B Fire

Answer 28

Involve combustible liquids such as:

1) Oil
2) Gasoline

Does not include Cooking oils

Question 29

Class C Fires

Answer 29

are electrical fires

Question 30

Class D Fires

Answer 30

Involves the combustion of metals

Question 31

Class K Fires

Answer 31

Involve any fires inside of kitchens

Animal fats
greases

Question 32

What Class of Fire is Water used on?

Answer 32

Class A

Question 33

What Class of Fire is CO2 used on?

Answer 33

Removes oxygen from air so is used on Class B and Class C fires

Question 34

What Class of Fire are Dry Chemicals used on?

Answer 34

Classes B, C and sometimes A

Question 35

What Class of Fire are Wet Chemicals used on?

Answer 35

Class K fires and sometimes Class A

Question 36

What Class of Fire is extinguished by Aqueous Film Forming Foam?

Answer 36

This soapy water foam not only uses water but can suffocate the fire. So it can be used in Class A and Class B fires

Question 37

What Class of Fire is extinguished by Dry Powders?

Answer 37

Class D fires

Question 38

What level is an oxygen rich environment?

Answer 38

At or above 22% oxygen in the environment