Chapter 1 Electrical Safety
A current flow through the body of ____________________ ampere or less can be fatal.
0.015
Discharge all capacitors with a(n) ____________________ ohm, four-watt resistor before touching the terminals
20,000
Which of the following voltages will a refrigeration, heating and air conditioning technician come in contact with in the industry?
24 volts 120 volts 240 volts
Electrical shock occurs when a person ____________.
Becomes part of the electric circuit
The severity of an electrical shock depends on the amount of _____ that flows through the body.
Current
Lockout _____ are lightweight enclosures that allow the lockout of standard control devices.
Devices
In a case of ventricular fibrillation, unless the heart is returned to normal quickly, the person will usually ___________.
Die
The electrical energy supplied to an electrical circuit is known as ____________________, and it is measured in volts.
Electromotive Force
When working with electricity, always wear shoes with a(n) ____________ sole and heel.
Insulated
Wearing rings, watches, or other jewelry when working in close proximity to live electrical circuits is generally considered a safe practice.
False
When assisting a person who is in contact with an electrical source, it is generally safe to touch him or her.
False
What type of ladder should a technician use on the job?
Fiberglass and Wood
The two most common methods of circuit protection in structures are______ and circuit breakers.
Fuses
A ________ is an electrical device that will open the circuit, preventing current flow to the receptacle when a small electrical leak to ground is detected.
GFIC
The _____ is used in an electrical circuit to allow current to flow back through the ground instead of through a person and causing electrical shock.
Ground wire
A(n) __________ adapter is a device that permits the connection of a three-prong plug to a two-prong receptacle.
Grounding
You've just locked out & tagged an energy-isolating device in order to perform preventive maintenance. What is your next step?
Inspect & test the equipment to make sure it is properly de-energized & disconnected.
A(n) ____________________ electrical circuit is one that is being supplied with electrical energy.
Live
Circuit ________ is a procedure that is used to interrupt the power supply to an electrical circuit or equipment.
Lockout
The ________ specifies the minimum standards that must be met for the safe installation of electrical systems.
NEC
Which of the following is the standard by which electrical installations are measured in the United States?
National Electrical Code
Which prong on a three prong plug is the ground?
The center semicircular prong
Do not use metal ladders when working near live electrical circuits.
True
Electrical shock occurs when a person becomes part of an electrical circuit.
True
One of the most important tasks that a service technician must learn is how to safely work around equipment when the power is being supplied to the equipment.
True
When electricity passes through the body, the results can range from death to a slight, uncomfortable stinging sensation, depending upon the amount of electricity that passes through the body, the path the electricity takes, and the amount of time that the electricity flows.
True
When electricity flows near or through the heart for only a short period of time, it can cause ____________________ fibrillation of the heart, in which the heart only flutters instead of beats.
Ventricular
