Effects of Wet Gloves on Hands

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Questions and Answers

What is a possible effect of wearing wet gloves for a prolonged period under cold conditions?

Plugged sweat glands

Painful cramps in the most commonly worked muscles

Affected hands (correct)

Red bumpy rash with severe itching

What can cause painful cramps in the most commonly worked muscles?

Wearing wet gloves for a prolonged period under cold conditions

Hot, humid environment

Plugged sweat glands

Heavy sweating from exercise (correct)

What is a characteristic of a rash caused by a hot, humid environment?

Affected hands

Onset can be immediate or delayed

Painful cramps in the muscles

Red bumpy rash with severe itching (correct)

When can the onset of painful cramps occur?

Immediately or delayed Signup and view all the answers

What is a possible cause of plugged sweat glands?

Hot, humid environment Signup and view all the answers

What is a common location where painful cramps can occur?

In the most commonly worked muscles (arms, legs, abdominals) Signup and view all the answers

What is a possible effect of heavy sweating from exercise?

Painful cramps in the most commonly worked muscles Signup and view all the answers

What is a characteristic of a hot, humid environment?

Hot, humid Signup and view all the answers

What can cause a red bumpy rash with severe itching?

Hot, humid environment Signup and view all the answers

What is a potential effect of skin contact with the gas?

Stinging pain and redness of the skin Signup and view all the answers

What is the primary effect of high altitude on the human body?

Decreased oxygen content in the air Signup and view all the answers

What is the threshold for immediate danger to life and health?

>100 ppm Signup and view all the answers

What is the recommended action when dealing with a serious ammonia leak or spill?

Use a water spray or fog to reduce the gas cloud Signup and view all the answers

What is a characteristic of sulphur dioxide?

It has irritating qualities Signup and view all the answers

What is the primary concern at high temperatures with low humidity?

Blistering effect of heat Signup and view all the answers

What is a potential hazard of methane in a mine during rescue operations?

It causes explosions Signup and view all the answers

What is a characteristic of carbon monoxide?

It is always present at the time of a fire Signup and view all the answers

What is the recommended action when dealing with a leaking ammonia cylinder?

Mark the cylinder DEFECTIVE and move it to an exhaust hood or safe outdoor area Signup and view all the answers

What is the effect of high temperatures with high humidity?

Considerable discomfort and enervation Signup and view all the answers

What is oxygen deficiency caused by?

The consumption of oxygen by combustion or chemical reaction Signup and view all the answers

What is a potential source of gas in mines?

All of the above Signup and view all the answers

What is a potential effect of contact with eyes?

Severe burns Signup and view all the answers

What is the recommended action when dealing with a gas leak in a mine?

Isolate the area until the gas has dispersed Signup and view all the answers

What is a warning sign of methane presence?

The presence of hydrogen sulphide Signup and view all the answers

What is the primary risk associated with the use of diesel motors underground?

Gas release from the motor Signup and view all the answers

What is a characteristic of explosive gases and smoke?

They obstruct vision Signup and view all the answers

What is the recommended action when dealing with a leaking cylinder that cannot be repaired?

Mark the cylinder DEFECTIVE and dispose of it properly Signup and view all the answers

What is the minimum percentage of oxygen required in the air for the unit to function?

19.5% Signup and view all the answers

What happens when the unit is exposed to higher levels of carbon monoxide?

It generates heat, thereby shortening the unit's duration Signup and view all the answers

What is the purpose of the heat exchanger in the breathing tube?

To cool the air before inhalation Signup and view all the answers

What is the reaction that produces heat in the unit?

The reaction between potassium superoxide and moisture from the exhaled breath Signup and view all the answers

What is the purpose of the quick start system?

To cover the immediate oxygen requirements of the user until the chemical of the canister becomes activated Signup and view all the answers

What is the maximum humidity level in which the unit can function?

95% Signup and view all the answers

What is the service life of the unit when properly stored?

10 years Signup and view all the answers

What is the purpose of the regulator in the backpack assembly?

To reduce the cylinder pressure to flow and pressure levels required for inhalation Signup and view all the answers

What is the purpose of the facepiece (mask) in the backpack assembly?

To provide some protection from facial burns and contact of smoke and fire gases with the eyes Signup and view all the answers

What is the main composition of toxic smoke?

Various gases produced during combustion Signup and view all the answers

What is the significance of rollover in a fire?

It is visible during the growth stage of a fire Signup and view all the answers

What is the rating of a fire extinguishing agent marked as 4A 60B C?

It is equivalent to 5 U.S. gallons of water and can extinguish 60 ft² of Class B fire Signup and view all the answers

What does the 'C' in the rating 4A 60B C stand for?

Non-conductive agent Signup and view all the answers

During which stage of a fire is dense black smoke typically visible?

Growth stage Signup and view all the answers

What is the significance of smoke emanating under pressure from cracks around windows or doors?

It indicates the fire is spreading rapidly Signup and view all the answers

What is the color of the smoke during the decay stage of a fire?

Grey-yellow Signup and view all the answers

What is the rating of a fire extinguishing agent marked as 10A 80B C?

It is equivalent to 12.5 U.S. gallons of water and can extinguish 80 ft² of Class B fire Signup and view all the answers

What is the significance of smoke-stained or blackened windows?

It indicates the fire has produced toxic gases Signup and view all the answers

Study Notes

Hazards of Working in Confined Spaces

Wearing wet gloves for a prolonged period under cold conditions can affect hands
Hot and humid environments can cause red, bumpy rashes with severe itching
Plugged sweat glands can lead to skin issues

Gas Hazards in Mining

Air gas mixture can be hazardous due to blasting, mine fires, diffusion of gases, and decay of mine timber
Methane and radon can diffuse from ore or country rock
Gas can be released from thermal water, including carbon dioxide and hydrogen sulfide
Diesel motors and absorption of oxygen by water can also contribute to gas hazards

Effects of Altitude, Humidity, and Temperature

High altitude can cause breathing difficulties due to low oxygen content
High temperatures with high humidity can be enervating and cause discomfort
High temperatures with low humidity can cause blistering effects

Acetylene and Ammonia Hazards

Acetylene can cause fires and explosions
Ammonia can cause skin burns, stinging pain, and redness
Ammonia contact with eyes can cause mild irritation to severe burns

Gas Exposure Limits

100 ppm of ammonia is immediately dangerous to life and health (IDLH)

Fire Hazards in Mining

Carbon monoxide can be present in fires and give little warning
Oxygen deficiency can occur due to combustion or chemical reactions
Explosive gases and smoke can irritate and obstruct vision
Methane can cause explosions and fires
Sulphur dioxide can be present in fires in sulphide ore bodies and give advance warning
Other gases like hydrogen sulphide, nitrous oxides, and hydrogen cyanide can also be present

Respiratory Protection

Respirators must provide at least 19.5% oxygen in the air
They must function in environments with no more than 95% humidity
They must protect against 1% carbon monoxide for one hour
They must generate heat when exposed to higher levels of carbon monoxide
They must have a service life of 10 years and a shelf life of 15 years

Types of Respiratory Protection

Dräger PSS BG4
Bio Marine BioPak 240R

Fire Stages

Incipient stage: fire is just starting
Growth stage: fire is spreading
Fully Developed stage: fire is intense and spreading quickly
Decay stage: fire is burning out

Fire Characteristics

Dense black smoke indicates a growing fire
Fire gases filling the fire area indicate a growing fire
Rollover is visible in a growing fire
Little or no visible flame in a fully developed fire
Smoke emanating under pressure from cracks indicates a growing fire

Extinguishing Agents

4A 60B C rating indicates an agent can extinguish 60 ft² of Class B fire
10A 80B C rating indicates an agent can extinguish 80 ft² of Class B fire

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Description

This quiz explores the consequences of wearing wet gloves for an extended period. It covers the impact on hand health and related issues.