Q2 Lesson 4 Flashcards
a picture or symbol intended to warn or alert people about potentially hazardous conditions and to help individuals operate tools more safely.
(e.g., for safety warnings in electrical environments)
electrical sign
indicates precautionary measures against a potential hazardous situation, which, if not avoided, may result in minor or moderate injury.
(e.g., for moderate hazards)
CAUTION sign
indicates that a person should observe extra awareness and be cautious about possible hazards.
SAFETY ALERT sign
means that an activity is not allowed as stated by the symbol.
(e.g., for prohibiting dangerous activities)
PROHIBITION sign
specifies a hazardous situation that, if not avoided, will result in serious injury or death.
DANGER sign
warns of dangerously high voltage that can cause serious injury.
HIGH VOLTAGE
informs workers and visitors of electrical hazards in a facility.
ELECTRICAL HAZARD sign
are small drawings or pictograms used to represent various electrical devices in a diagram or plan of an electrical circuit.
electrical symbols
What is the function of a switch in an electrical circuit?
A switch is used to make a circuit either “open” or “close,” controlling the flow of electricity.
What is the purpose of a cell in a circuit?
A cell is the source that develops the charge for the circuit, providing electrical power.
created by connecting several cells together. It provides more energy than a single cell.
battery
will light up when electrical charge flows through it.
(e.g., for lighting up in response to electricity)
lamp
a safety component that contains a wire with a low melting point. It cuts off the current if the circuit is overloaded.
fuse
an instrument used to measure the voltage of either direct or alternating electric current in a circuit.
voltmeter
a device used for measuring electric current in amperes, whether it’s direct (DC) or alternating (AC) current.
ammeter
