Which one of these methods is not acceptable for putting out an electrical fire? Feedback:Water is not acceptable for putting out an electrical fire.
Which method most effectively protects machines tools and operators against damage from electrical current?
Feedback:Service and equipment grounding MOST effectively protects machines, tools, and operators against damage from electrical current.
What conditions should be confirmed to verify an electrically safe work condition?
Establishing an Electrically Safe Work Condition
- Identify power sources.
- Disconnect power sources.
- Verify that power is off.
- Verify again that power is off.
- Discharge stored electrical energy (and install safety grounds under certain conditions).
What type of burns are the result of current flowing through and exiting the body?
Electrical burns are the result of the electric current flowing in the tissues, and may be either skin deep or may affect deeper layers (such as muscles and bones) or both.
What do tripped circuit breakers and blown fuses indicate?
Tripped circuit breakers and blown fuses show that too much current is flowing in a circuit. This condition could be due to several factors, such as malfunctioning equipment or a short between conductors. … An extension cord that feels warm may indicate too much current for the wire size of the cord.
What is the best method of controlling electrical hazard?
There are various ways of protecting people from the hazards caused by electricity. These include: insulation, guarding, grounding, electrical protective devices, and safe work practices. One way to safeguard individuals from electrically energized wires and parts is through insulation.
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.
How do you extinguish an electrical fire?
Put Your Safety First
- Disconnect the Electricity. First, disconnect the electricity to the source of the fire. …
- Use Baking Soda for Small Electrical Fires. If the fire began in an appliance or an overloaded cord, once you’ve unplugged the power source, toss baking soda over the flames. …
- Never Use Water While the Power Is On.
What are common electrical hazards?
What are the hazards?
- electric shock and burns from contact with live parts.
- injury from exposure to arcing, fire from faulty electrical equipment or installations.
- explosion caused by unsuitable electrical apparatus or static electricity igniting flammable vapours or dusts, for example in a spray paint booth.
What is the first step in establishing electrically safe work conditions?
Procedure to Establish an Electrically Safe Work Condition
Care should be taken to identify possible secondary sources. Properly interrupt the load current(s) and open the disconnecting device(s). Not all disconnecting devices are rated to interrupt load currents; this should only be done with a properly rated device.
What is filigree burn?
known as Lichtenberg’s flowers or arborescent or filigree burns; they are characterized by multiple, superficial, irregular, tortuous arborescent markings on the skin resembling the branches of a tree. This fern-like pattern of erythema on the skin is usually found over the shoulders or the flanks.
How do I know if I have an electrical burn?
What are the signs and symptoms of electrical burns in adults?
- Burns or other wounds on your skin.
- Headache, dizziness, confusion, or memory loss.
- Fast or abnormal heartbeat.
- Shortness of breath.
- Weakness, stiffness, or muscle pain.
- Problems walking or keeping your balance.
- Red or reddish black urine.
- Pain throughout your body.
What does electrical burn look like?
They cause blisters and the skin is very red or splotchy. There may be more significant swelling. Third-degree burns —These cause damage to all layers of the skin down to the tissue underneath. The burned skin looks white or charred.
Which electrical device shuts down?
Answer: A FUSE OR CIRCUIT breaker prevents this by ”blowing,” or breaking the circuit, when an overload occurs.
How do you tell if a fuse is blown?
Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.
How can you tell if a house fuse is blown?
A blown fuse will have a broken metal line or cloudy appearance in its glass top. After you have located the fuse, be sure power is off to the entire house by pulling out the main fuse block. You will need to replace the blown fuse with a new one that is the same amperage.