Table of Contents
Which one of the following circuit interrupts is most effective at preventing major shocks? GFCI is the right answer because others cannot shut down electricity immediately.
What is the preferred setback distance from overhead wires during cleanup OSHA?
Stay at least 10 feet away from overhead wires during cleanup and other activities.
What is the preferred setback distance from overhead wires quizlet?
Stay at least 10 feet (3 meters) away from overhead wires during cleanup and other activities.
Which of the following is most likely to cause injury due to contact with electricity quizlet?
Burns are the most common injury caused by electricity. thermal contact burns. If there is a small electrical fire, be sure to use only a_____ or _____ fire extinguisher. The three stages of the safety model are ____,____ and ____.
What can your employer do to protect you from overhead power lines quizlet?
Some requirements employers must do to protect workers from electrical hazards are: ensure overhead power lines safety; supply GFCIs; isolate electrical parts; ensure proper grounding and: Electrical equipment can instantly change from safe to hazardous because of extreme conditions and rough treatment.
Which of the following are designed to interrupt the current flow of electricity when unsafe conditions arise?
Ground-fault circuit interrupters, or GFCIs, are used in wet locations, construction sites, and other high-risk areas. These devices interrupt the flow of electricity within as little as 1/40 of a second to prevent electrocution.
How far does EMF travel from power lines?
Possible Safety Distances to Consider for EMF Sources Safety Distances from Various EMF Sources: Possible EMF Safety Distances To Consider for Common EMF Sources ELF Magnetic Fields Power Lines High voltage power lines (on metal towers) 700 feet Neighborhood distribution power lines (on wooden poles) 10 to 200 feet.
What are the 3 hazards of electricity?
The major hazards associated with electricity are electrical shock, fire and arc flash.
What do tripped circuit breakers and blown fuses indicate?
When a circuit breaker regularly trips or a fuse repeatedly blows, it is a sign that you are making excessive demands on the circuit and need to move some appliances and devices to other circuits. Or, it may indicate that your house has too few circuits and is in need of a service upgrade.
What do tripped circuit breakers and blown fuses indicate quizlet?
Feedback:Two-wire type cords are not safe. What do tripped circuit breakers and blown fuses indicate? Feedback: Electricity becomes hazardous to humans when it completes a circuit through the body.
Which one of the following circuit interrupts is most effective?
Which one of the following circuit interrupts is most effective at preventing major shocks? GFCI is the right answer because others cannot shut down electricity immediately.
What is the most common injury working with electricity?
Electrical burns are the most common shock-related, nonfatal injury. They occur when a worker contacts energized electrical wiring or equipment. Although electrical burns can occur anywhere on the body, they most often occur on the hands and feet.
What is the most common type of injury from electric shock quizlet?
Burns are the most common shock-related injury. An electrical accident can result in an electrical burn, arc burn, thermal contact burn, or a combination of burns.
Which of the following is the best way to prevent injury from electrical hazards to the worker?
Which of the following is the best way to prevent injury from electrical hazards to the worker? If workers wear arc-rated clothing and other protective equipment, they are assured of escaping electrical incidents unscathed.
What does the GFCI do quizlet?
A ground fault circuit interrupter (GFCI): Detects ground faults and interrupts the flow of electric current, and is designed to protect the worker by limiting the duration of an electrical shock.
What are the two best means of avoiding injury from electrical devices?
The two best means of avoiding electrical shock or injury when working with power tools are: Insulation and grounding.
What are the 4 main types of electrical injuries?
There are four main types of injuries: electrocution (fatal), electric shock, burns, and falls. These injuries can happen in various ways: Direct contact with exposed energized conductors or circuit parts.
What part of a circuit stops the current?
Fuses. An electrical fuse is a device that sacrifices itself to provide over-current protection in an electrical circuit. Conducting wires have a small electrical resistance.
Which of the circuit will current flow?
WHEN DOES CURRENT FLOW IN A CIRCUIT? Current only flows when a circuit is complete? when there are no gaps in it. In a complete circuit, the electrons flow from the negative terminal (connection) on the power source, through the connecting wires and components, such as bulbs, and back to the positive terminal.
Do trees block EMF?
When trees are between your house and a source of EMF radiation they will help to reduce it. In particular, trees can reduce all types of wireless RF (radio-frequency) radiation. Trees can also help to block the electric fields originating from overhead powerlines.
What type of radiation is EMF?
The electric and magnetic forces in EMFs are caused by electromagnetic radiation. There are two main categories of EMFs: Higher-frequency EMFs, which include x-rays and gamma rays. These EMFs are in the ionizing radiation part of the electromagnetic spectrum and can damage DNA or cells directly.
What do power lines emit?
Power lines and electrical products emit extremely low frequency electric and magnetic fields (EMF). Learn about the safety of power lines and electrical products.
What are the 5 main electrical hazards?
These are eight of the most dangerous electrical hazards that can be observed in a home: Poor Wiring and Defective Electric Wires: Outlets Close to Water. Lightbulbs. Covered Electrical Cords and Wires. Pouring Water on Electrical Fires. Inquisitive Young Children. Wet Hands. Extension Cords.
What is electrical hazard?
Electrical Hazard – A dangerous condition such that contact or equipment failure can result in. electric shock, arc-flash burn, thermal burn, or blast. (.
What are 5 electrical safety tips?
Electrical safety for kids Never put fingers or other objects in an outlet. Keep metal objects out of toasters. Never use anything with a cord or plug around water. Never pull a plug out by its cord. Stay away from substations and power lines. Don’t climb on power poles. Never fly kites near power lines.
What is overload circuit?
What is a Circuit Overload? When you try to use more electricity than your circuit is made for, you get a circuit overload. When there is a circuit overload, the circuit breaker will trip and open up, which shuts off the power supply to that circuit, cutting off electricity.
What is trip circuit breaker?
When it is said that a circuit breaker “trips,” it means that circuit has detected what’s known as a fault condition and has shut itself off to prevent the wiring from overheating and potentially igniting itself.
What is a grounded circuit?
With a grounded circuit, only one wire becomes hot and the other wire is grounded. Touching the hot wire still exposes a person to the full circuit voltage. In a grounded circuit, we often refer to the electricity traveling from the source to the load on the hot wire and returning to the source on the grounded wire.
