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Termination and installation of electrical ciruits

What is the unit of electrical resistance?
Ampere
Volt
Ohm
Watt
Which of the following materials is a good conductor of electricity?
Rubber
Copper
Glass
Aluminum
Plastic
What is the purpose of a fuse in an electrical circuit?
To increase voltage
To regulate current
To store energy
To protect against overcurrent
Which of the following is an example of a renewable energy source?
Coal
Solar power
Natural gas
Wind power
Nuclear power
What is the symbol for a resistor in an electrical circuit diagram?
R
V
I
C
What is the purpose of an insulator in an electrical circuit?
To conduct electricity
To regulate voltage
To store energy
To prevent the flow of electricity
Which of the following is a safety precaution when working with electrical circuits?
Wearing rubber gloves
Touching exposed wires with bare hands
Turning off power before making repairs
Using wet tools
Standing on a wet surface
What is the purpose of a circuit breaker in an electrical circuit?
To increase voltage
To regulate current
To store energy
To protect against overcurrent
What is the formula for calculating electrical power?
What is the purpose of a ground wire in an electrical circuit?
To provide a return path for current
To increase resistance
To regulate voltage
To prevent electric shock
Which of the following is an example of a series circuit?
Christmas lights connected in parallel
A flashlight with multiple batteries connected in series
A wall outlet
A circuit with multiple switches connected in parallel
A circuit with a single path for current
What is the purpose of a diode in an electrical circuit?
To increase resistance
To regulate voltage
To store energy
To allow current flow in one direction only
Which of the following is an example of a parallel circuit?
A light bulb connected to a battery with a single wire
A circuit with multiple light bulbs connected in series
A circuit with multiple paths for current
A circuit with a single switch controlling multiple devices connected in parallel
What is the purpose of a capacitor in an electrical circuit?
To increase resistance
To regulate voltage
To store energy
To prevent electric shock
What is the purpose of a transformer in an electrical circuit?
To increase resistance
To regulate voltage
To store energy
To prevent electric shock
Which of the following is an example of a closed circuit?
A broken wire
A switch turned off
A complete loop with no breaks
A disconnected battery
A circuit with a resistor
What is the purpose of a relay in an electrical circuit?
To increase resistance
To regulate voltage
To store energy
To control the flow of current in another part of the circuit
What is the purpose of a voltmeter in an electrical circuit?
To increase resistance
To regulate voltage
To measure voltage
To prevent electric shock
Which of the following is an example of an open circuit?
A complete loop with no breaks
A switch turned off
A disconnected wire
A circuit with a resistor
A circuit with a capacitor
What is the purpose of a transistor in an electrical circuit?
To increase resistance
To regulate voltage
To amplify or switch electronic signals
To prevent electric shock
What is the purpose of an ammeter in an electrical circuit?
To increase resistance
To regulate voltage
To measure current
To prevent electric shock
Which of the following is an example of a short circuit?
A complete loop with no breaks
A wire accidentally touching another wire
A circuit with a resistor
A circuit with a capacitor
A circuit with a diode
What is the purpose of a potentiometer in an electrical circuit?
To increase resistance
To regulate voltage
To vary the resistance in a circuit
To prevent electric shock
What is the purpose of a thermistor in an electrical circuit?
To increase resistance
To regulate voltage
To measure temperature
To prevent electric shock
Which of the following is an example of a ground fault circuit interrupter (GFCI)?
A circuit breaker
An outlet with built-in protection against electric shock
A fuse
A transformer
A capacitor
What is the purpose of a relay coil in an electrical circuit?
To increase resistance
To regulate voltage
To generate an electromagnetic field
To prevent electric shock
What is the purpose of a light-emitting diode (LED) in an electrical circuit?
To increase resistance
To regulate voltage
To emit light when current flows through it
To prevent electric shock
Which of the following is an example of a three-phase electrical system?
A single-phase household electrical system
Industrial power distribution systems
A battery-powered device
A solar-powered system
A wind turbine generator
What is the purpose of a surge protector in an electrical circuit?
To increase resistance
To regulate voltage
To protect against voltage spikes and surges
To prevent electric shock
What is the purpose of a ground fault interrupter (GFI) in an electrical circuit?
To increase resistance
To regulate voltage
To quickly shut off power in case of a ground fault
To prevent electric shock
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