Electricity Basics Quiz

What is the main job of an electrician?

• Fixing cars

• Installing and repairing electrical systems

• Cooking food

• Painting houses

Answer explanation

The main job of an electrician is to install and repair electrical systems, ensuring they function safely and efficiently. This distinguishes them from other professions like mechanics, chefs, or painters.

Which of the following might an electrician work on?

• Electrical wiring in buildings

• Water pipes

• Carpentry

• Bricklaying

Answer explanation

An electrician specializes in electrical systems, making 'Electrical wiring in buildings' the correct choice. The other options, such as water pipes, carpentry, and bricklaying, are not within an electrician's scope of work.

Why do electricians wear rubber gloves?

• To keep their hands clean

• To protect from electric shocks

• To look professional

• To carry heavy tools

Answer explanation

Electricians wear rubber gloves primarily to protect themselves from electric shocks. These gloves are designed to insulate against electrical currents, ensuring safety while working with live wires and electrical systems.

What should an electrician do before working on a circuit?

• Turn off the power

• Use extra wires

• Touch the wires to check for current

• Ignore safety rules

Answer explanation

Before working on a circuit, an electrician should always turn off the power to ensure safety. This prevents electrical shock and accidents while handling wires.

Which tool is commonly used by electricians?

• Hammer

• Screwdriver

• Digital multimeter

• Paintbrush

Answer explanation

Electricians commonly use a digital multimeter to measure voltage, current, and resistance, making it essential for troubleshooting electrical issues. While hammers and screwdrivers are useful, they are not specific to electrical work.

What does a digital multimeter measure?

• Time, speed, and distance

• Voltage, current, and resistance

• Weight, height, and temperature

• Sound, light, and color

Answer explanation

A digital multimeter is designed to measure electrical parameters such as voltage, current, and resistance. It does not measure time, speed, distance, weight, height, temperature, sound, light, or color.

What should you do before using a digital multimeter?

• Throw it in water

• Check the settings and probes

• Shake it

• Press all the buttons randomly

Answer explanation

Before using a digital multimeter, it's essential to check the settings and probes to ensure accurate measurements and safety. Incorrect settings or damaged probes can lead to faulty readings or equipment damage.

What symbol is used for voltage on a multimeter?

• V

• A

• Ω

• W

Answer explanation

The symbol for voltage on a multimeter is 'V'. This represents volts, the unit of measurement for electrical potential difference. The other symbols represent different measurements: 'A' for amperes, 'Ω' for ohms, and 'W' for watts.

If a circuit has no power, what will the multimeter show for voltage?

• 100V

• 50V

• 0V

• It will beep loudly

Answer explanation

If a circuit has no power, there is no electrical potential difference, so the multimeter will show 0V. This indicates that there is no voltage present in the circuit.

Why should you set the correct range on a multimeter?

• To avoid damage

• To make it look cool

• To increase electricity

• To make sparks

Answer explanation

Setting the correct range on a multimeter is crucial to avoid damage to the device and ensure accurate readings. Using an incorrect range can lead to overload and potentially ruin the multimeter.