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WorksheetsElectrical apprentices 1
Total questions: 16
Worksheet time: 15mins
Remember: V=IR and P=VI
Remember: I = P/V
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
