Safety Flashcards
List the 7 general safety rules
- Never work on an energized circuit if the power can be disconnected
- Think
- Avoid horseplay
- Do not work alone
- Work with one hand when possible
- Learn first-aid
- Avoid alcohol and drugs
What are the 3 steps when making certain that the power has been turned off
- Test the meter on a known live circuit to make sure the meter is operating
- Turn off the power and test the circuit that is to become the de-energized circuit with the meter
- Test the meter on the known live circuit again to make certain the meter is still operating
A current of ________ usually causes a slight tingling sensation
2 to 3 milliamperes
Currents between ________ cause muscular paralysis
30 and 40 milliamperes
Between ________ causes breathing difficulty
40 and 60 milliamperes
Currents between ________ generally cause death
100 and 200 milliamperes
________ is a condition in which the heart begins to “quiver” and the pumping action stops
Fibrillation
What is the mission of the Canadian Centre for Occupational Health and Safety (CCOHS)?
The CCOHS advocates for the complete physical, psychosocial, and metal well-being of working Canadians by providing training, information, and management systems. In short, to ensure safe and healthy workplaces in Canada
________ outlines requirements for workplace electrical safety in Canada
CSA-Z462
Information concerning hazardous materials is generally found on ________
Safety data sheets (SDS)
List the 4 general safety rules for trenches
- Do not walk close to trenches unless it is necessary. This can cause the dirt to loosen and increase the possibility of a cave-in
- Do not jump over trenches if it is possible to walk around them
- Place barricades around trenches
- Use ladders to enter and exit trenches
________ have a limited means of entrance and exit
Confined spaces
List the 4 general rules for confined spaces
- Have a person stationed outside the confined space to watch the person or persons working inside. The outside person should stay in voice and visual contact with the inside workers at all times. They should check air sample readings and monitor oxygen and explosive gas levels
- The outside person should never enter the space, even in an emergency. but should contact the proper emergency personnel
- Use only electric equipment and tools that are approved for the atmosphere found inside the confined space
- A person working in a confined space should wear a harness with a lanyard that extends to the outside person
________ procedures are generally employed to prevent someone from energizing a piece of equipment by mistake
Lockout and tagout
When performing a lockout and tagout procedure, who is responsible for placing the lock on the equipment? Who should have possession of the key?
The person performing the work
List the 6 articles of clothing maintenance and construction workers are usually required to wear
- Head protection
- Eye protection
- Hearing protection
- Fire-retardant clothing
- Gloves
- Safety harness
List the 3 situations when a safety harness should be worn
- When working more than 3 metres above the ground or floor or where a fall from a lesser height could result in a serious injury
- When working near a hole or drop-off
- When working on high scaffolding
________ generally provide the safest elevated working platforms
Scaffolds
Straight ladders should be placed against the side of a building or other structure at an angle of ________
76 degrees. The base of the ladder should be placed at a distance equal to one-fourth of the height
The 3 things required for a fire to burn are ________
Fuel, heat, and oxygen
________ involve common combustible materials such as wood or paper
Class A fires
________ involve fuels such as a grease, combustible liquids, or gasses
Class B fires
________ involve energized electrical equipment
Class C fires
________ consist of burning metal
Class D fires
________ are used to protect people from electric shock
Ground-fault circuit interruptors (GFCI)
GFCIs are designed to detect a current difference of approximately ________
5 milliamperes (0.005A)
What is a ground fault?
A ground fault occurs when an unintended path to ground is established
Which 3 devices provide ground-fault protection?
Ground-fault circuit breaker, ground-fault receptacles, and GFCI extension cords
________ are designed to protect people from electrical fires
Arc-fault circuit interrupters
There are conditions where arcing in an electric circuit is normal. List 5 of these conditions
- Turning a light switch on or off
- Switching on or off of a motor relay
- Plugging in an appliance that is already turned on
- Changing a light bulb with the power turned on
- Using motors that contain a commutator and brushes
________ are caused by two conductors becoming shorted together
Parallel arc-faults
________ are generally caused by loose connections
Series arc-faults
________ covers the requirements for the grounding and bonding of electrical systems
CEC Section 10
