Electrical capstone prep part 1

As the temperature of a conductor increases, its resistance will?

• increase

• decrease

• remain the same

• reach a maximum

A voltmeter connected between points of equal potential will indicate?

• a short circuit

• a max reading on the meter

• a zero reading on the meter

• a negative reading

Using As/NZS3012, at a construction site how are construction wiring systems distinguished or marked from permanent wiring systems?

• using sheaths of different colour

• iridescent yellow tape spaced not exceeding 5m

• marked with the words 'construction wiring'

• all of the above

Using AS/NZS3012 clause 2.6.3

When taking power from temporary construction switchboard, what type of lead should be used?

• heavy duty sheath

• TPS

• any

• building wire

Using AS/NZS3000

What would be the reason for an area being classified as a hazardous area if electrical equipment is to be installed? Provide the clause

A likely cause of reported electrical shocks (tingles) from the metallic water system in premises with a MEN earthing system is

• an open cct in the neutral conductor supplying the water heater

• a short cct to earth of a sub-cct active conductor

• a high resistance in consumer's supply neutral conductor

• a short cct in a cub-cct protected by a re-wireable fuse

The maximum resistance of an earth conductor accompanying a sub-mains cct shall be

• < or = to 0.5ohm

• < or = to 2ohm

• < or = to 1Mohm

• low enough to permit the passage of current necessary to operate the overcurrent protective device

An electric motor rotates due to the?

• chemical effect of the current

• magnetic effect of the current

• applied voltage

• load driving it

The current in a series circuit is?

• equal to the sum of the current in each component

• proportional to the total resistance of the circuit

• the same in all parts of the circuit

• measured with an galvonometer

An 'open cct' occurs where there is?

• single insulated cables installed without protection

• excessive conductor length

• a circuit down to earth

• a break in cct continuity