Electrical Cable Knowledge Quiz

What do you mean by 3 x 1c 300Al XLPE 11KV in a single line diagram?

• 3 times 1 centimetre 300 amps line, unearthed cable

• 3 core plus 1 core 300 amps lead sheathed 11KV cable

• 3 core 300 mm square copper sheathed 11KV cable

• 3 single core 300 mm square aluminium sheathed 11000V cable

What you mean by ‘phasing out’ term in jointing cables would be?

• A system to ensure safe isolation

• The replacement of old colour markings with new ones

• The location of high resistance joints

• A method of ensuring correct phase rotation

Cable spiking is used for

• Ensuring a cable is dead at the point of work

• Prove a cable is live and still in service

• Ensure no current surges are present

• Ensure no voltage surges are present

An expansion joint is used in some types of high voltage underground cable to the counteract the effect of

• Excessive oil pressure

• Load surges

• Increased loading

• Subsidence

When handling cold pour resins the mandatory PPE would be

• Overalls and eye protection

• Disposable gloves and breathing apparatus

• Breathing apparatus and overall

• Eye protection and disposable gloves

The instrument used for synchronisation would be.

• Earth impedance tester

• Insulation resistance tester

• Multi-meter

• Test-lamp

The full form of PILCSWA in Underground cables refers to

• Plastic insulated lead covered steel wire armoured cable

• Plastic insulated laminated copper steel wire armoured cable

• Paper insulated lead covered steel wire armoured cable

• Paper insulated lead conductor steel wire armoured cable

One method of testing for moisture in oil is by

• Hygroscopic crystals

• Litmus paper

• A crackle test

• Gas produced by a fault

On 400 kv over-headline the spacers are provided to

• Reduce the corona discharge

• Increase strength of the lines

• Facilitate live line maintenance

The essential requirement of an earth electrode system is that it must

• Carry fault current indefinitely

• Carry a low resistance to atmospheric corrosion

• Have a low voltage gradient at the surface of the ground

• Have a low electrical resistance