Electrical Pre Test

What is the unit of electrical current?

• Volt

• Ohm

• Watt

• Ampere

What is the unit of electrical resistance?

• Ampere

• Volt

• Ohm

• Watt

What does Ohm’s Law state?

• Voltage = Current × Resistance

• Power = Voltage × Resistance

• Current = Voltage × Power

• Resistance = Voltage × Current

What is the formula for calculating electrical power?

• Power = Voltage × Current

• Power = Voltage × Resistance

• Power = Current × Resistance

• Power = Voltage / Current

Which of the following is a key safety practice when working with electricity?

• Working with wet hands

• Using damaged electrical cords

• Turning off power before working on electrical circuits

• Overloading electrical outlets

What should you do if you receive a minor electric shock?

• Ignore it and continue working

• Report it to a supervisor or instructor and seek medical advice

• Apply ice to the affected area

• Try to self-treat with home remedies

What is the purpose of a circuit breaker in an electrical system?

• To increase electrical current

• To measure electrical voltage

• To protect the circuit from overloads and short circuits

• To control the flow of current through a device

What is a parallel circuit?

• A circuit with components connected in a loop

• A circuit where the components share the same path for current flow

• A circuit with multiple paths for current to flow

• A circuit that does not allow current to flow

What is the function of a capacitor in an electrical circuit?

• To store and release electrical energy

• To convert electrical energy into mechanical energy

• To protect against short circuits

• To regulate the current flow

Which component is used to control the flow of electricity by switching it on and off?

• Capacitor

• Diode

• Transistor

• Switch