Electrical Fault Finding A

An approved voltage indicator should be used to

• Measure R1+R2

• Prove a circuit is dead before work begins

• Measure appropriate voltage

• Prove a circuit is live before work begins

The definition of isolation is

• Functional switching for normal operation

• Single pole devices connected in the phase conductor

• Removing from every source of electrical energy

• Isolating equipment from general mass of earth

The item shown in the photo should be used in what process?

• Voltage measurement

• Socket polarity

• Calibration checks

• Safe isolation

Which of the following is the most likely of implications caused from an exposed terminal?

• Electric shock to a person or livestock

• MCB operate

• RCD Operates

• Main Cut off fuse operates

When working on a circuit supplied by a fuse, which of the following methods is the LEAST acceptable method of ensuring accidental re-energisation?

• The gap should be covered by bright insulation tape

• A lockable fuse insert is put in its place

• The lid of the consumer unit is locked

• A dummy fuse carrier should be placed in place

The safest method of ensuring that a system is safe to work on is?

• Follow the safe isolation procedure

• Isolate the installation at the main cut-out

• Use a fluke volt stick before you begin

• Place barriers at the distribution boards

What is the benefit of using multi-hasp type padlock when isolating and locking off a circuit for maintenance?

• More than one circuit can be isolated at any one time

• Any single operative can make the circuit live once they have completed their task

• A circuit can only be made dead if all the operatives use locks

• More than one person can work on the circuit safely

Which of the following is the most likely of implications caused from fault diagnostics

• Arcing

• Open circuit

• Loss of power

• Short circuit

Which of the following would be most important to be discussed with the client prior to any fault diagnostics being carried out.

• Cost of the work

• Isolation timing

• The Earthing system

• The breaking capacity of the main protective device

Which of the following could cause an SPD to operate

• Short circuit

• Lightning stikes in the area

• Overload in the circuit

• A damaged light switch