Electrical Engineering Quiz

Why are stockbridge dampers used on the overhead line steel towers?

• To reduce damage due to lightening

• To increase conductor strength

• To increase insulator resistance

• To reduce damage due to vibration

What is the minimum open ground clearance for an LV overhead line?

• 6.4m

• 5.2m

• 2.8m

• 4.2m

The purpose of screening 3-phase high voltage cables is to

• Stop electrolytic action

• Control tangential stresses

• Provide good earth continuity

• Give extra mechanical protection

On a cable plan the letters ABSD may appear. This would refer to

• Aerial bundled steel distributer

• Air blast system disengager

• Air break switch disconnector

• Aerial balanced safety distancer

Tap changer has the ability to alter

• The outgoing voltage

• The incoming voltage

• The outgoing current

• The incoming current

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.

By cable spiking what potential risk is being controlled or minimised

• moisture

• flashover

• Results in deterioration

• puncture

Main reason for earthing a neutral point on a low voltage 4 wire system?

• Voltage stabilisation

• Overcurrent protection

• Limits currents at houses

• Prevents electrocution

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