Safety Precautions and Properties of Gases in Welding

What is the primary purpose of wearing self-contained breathing apparatus when dealing with ammonia fires?

To prevent inhalation of irritating ammonia gas (correct)
To prevent ammonia from coming into contact with the skin
To protect against explosions
To prevent ammonia from reacting with other chemicals

What is the recommended action to take when fighting fires involving ammonia?

Evacuating the area and waiting for the fire to burn out
Stopping the flow of gas or liquid and moving ammonia cylinders from the fire area (correct)
Using foam extinguishers to smother the fire
Using water to extinguish the fire directly

What is the minimum concentration of ammonia in the air that can cause moderate irritation of mucus membranes?

40–60 PPM
30 PPM
5–15 PPM (correct)
1–3 PPM

What is a characteristic of carbon dioxide that is relevant to its use in firefighting?

It is a colourless, odourless gas that can cause a distinctly acidic taste (C) Signup and view all the answers

Which type of tools is used to apply impact force or to gain access?

Striking tools (A) Signup and view all the answers

What is the primary purpose of hazardous atmosphere and spill tools?

To protect responders and help with cleanup (B) Signup and view all the answers

Which of the following is NOT a type of rotating tool?

Hydraulic jacks (B) Signup and view all the answers

What is the common purpose of energy sources in rescue operations?

To provide independent energy in the field (B) Signup and view all the answers

Which type of tools is used to sever an object?

Cutting tools (A) Signup and view all the answers

What is the primary purpose of Intrinsic Safety in electrical equipment and wiring?

To prevent ignition of hazardous atmospheric mixtures (C) Signup and view all the answers

What type of instruments are used in mine rescue gas detection?

Direct-reading instruments (DRI) (C) Signup and view all the answers

What is the first step to be taken before any gas testing?

Considering personal protective equipment (A) Signup and view all the answers

What is a critical factor to consider when selecting gas detection equipment?

The type of hazardous atmosphere (A) Signup and view all the answers

What is a requirement for all gas detection equipment?

It must meet relevant health and safety legislation, standards, and regulations (D) Signup and view all the answers

Which of the following organizations provides publications related to occupational health and safety?

Canadian Centre for Occupational Health and Safety (CCOHS) (D) Signup and view all the answers

What is the purpose of the manual mentioned in the text?

To cover basic mine rescue principles, techniques, and equipment (C) Signup and view all the answers

Which of the following organizations is not a government agency?

Alberta Mine Safety Association (D) Signup and view all the answers

What is the purpose of the Operation Recharge Inspection and Maintenance Manual?

To provide inspection and maintenance procedures for fire extinguishers (B) Signup and view all the answers

Which of the following organizations is a manufacturer of rescue equipment?

Carleton Rescue Equipment (B) Signup and view all the answers

What is the primary purpose of performing a pump leak test before using a colorimetric detector tube?

To verify the detector tube is functioning properly (B) Signup and view all the answers

What is the advantage of using a colorimetric detector tube with a printed measuring scale?

It provides immediate reading of the result (C) Signup and view all the answers

What is an important consideration when storing colorimetric detector tubes?

Avoiding direct sunlight and extreme temperatures (C) Signup and view all the answers

What is the primary limitation of using a short-term indicator tube?

The readings must be compared to short-term exposure limits (B) Signup and view all the answers

What is an advantage of colorimetric detector tubes in terms of operation?

They can be operated with one hand (D) Signup and view all the answers

What should you do if an acetylene cylinder has been laid on its side?

Place the cylinder upright and wait at least one hour before using (D) Signup and view all the answers

Why is it important to call gases by their proper names?

To prevent death or injury under certain circumstances (D) Signup and view all the answers

What is the characteristic smell of ammonia?

Pungent and similar to drying urine (B) Signup and view all the answers

What should you do if you find a leaking ammonia cylinder?

Move the cylinder to an exhaust hood or safe outdoor area for venting (A) Signup and view all the answers

What is the most important consideration when using any tool during a rescue operation?

Safety (B) Signup and view all the answers

What is essential for properly operating tools during a rescue operation?

Adequate lighting (C) Signup and view all the answers

What should be done before using a tool during a rescue operation?

Examine the tool for damage (C) Signup and view all the answers

What should be worn when operating any tool during a rescue operation?

The appropriate PPE (A) Signup and view all the answers

What should be considered when using power tools during a rescue operation?

The unique demands of power tools (A) Signup and view all the answers

Why is training and practice required before using rescue tools?

To ensure proper use and function (D) Signup and view all the answers

What should be done before operating a tool during a rescue operation?

Evaluate the consequences of operation (D) Signup and view all the answers