Journeyman Electrician Practice Exam

What is the definition of a "branch circuit" according to the National Electrical Code (NEC)?

• A circuit that supplies power to multiple buildings

• A circuit that supplies power to one or more outlets or devices

• A circuit that is used exclusively for lighting

• A circuit that is used for emergency systems

Calculate the total load in amperes for a circuit with a voltage of 240V and a power consumption of 4800W.

• 10A

• 20A

• 30A

• 40A

Which of the following is a characteristic of alternating current (AC)?

• It flows in one direction only

• It has a constant voltage

• It changes direction periodically

• It is used only in battery-powered devices

What is the minimum size of a grounding electrode conductor for a 200A service?

• 6 AWG

• 4 AWG

• 2 AWG

• 1/0 AWG

What is the maximum allowable voltage drop for branch circuits according to the NEC?

• 2%

• 3%

• 5%

• 10%

Which type of conduit is suitable for use in wet locations?

• PVC conduit

• EMT conduit

• Flexible metal conduit

• Rigid metal conduit

What is the purpose of a circuit breaker?

• To increase the voltage in a circuit

• To protect the circuit from overload and short circuits

• To convert AC to DC

• To measure the current in a circuit

What type of motor is commonly used in household appliances?

• Synchronous motor

• Induction motor

• Stepper motor

• Servo motor

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

• To provide a manual switch

• To amplify the current

• To automatically control the circuit based on input signals

• To convert electrical energy to mechanical energy

What is the NEC requirement for wiring in hazardous locations?

• Use of standard wiring methods

• Use of explosion-proof equipment

• Use of aluminum wiring

• No special requirements