Which of the following is NOT a primary source of energy?

• Wind

• Solar

• Coal

• Photon

What voltages does the secondary distribution system provide for domestic and light commercial use?

• 400V and 230V

• 110V and 220V

• 500V and 300V

• 100V and 200V

The power stations connected to the grid has

• Same supply voltage

• Same supply frequency

• Same capacity

• Same efficiency

What voltage levels does the primary distribution system operate at?

• 10kV and 5kV

• 50kV and 20kV

• 33kV and 11kV

• 100kV and 50kV

Underground cables are less expensive than overheads only in terms of

• Maintenance

• Repair and jointing

• Manufacture

• Installation

PME are also named as

• TN-S

• TN-C-S

• SNE

• TT

A neutral in SNE four wire system is to provide

• 230V Supply

• 400V Supply

• Balanced load

• Bonding condition

The objective of powder filling in fuse cartridges is to

• Smoothen the arc when the link operates

• Centralise the fuse link

• Reduce the corrosion of the fuse

• Damp out vibrations of the link

One of the functions of Electricity Regulator is to protect the interest of consumers.

• True

• False

The purpose of a current transformer

• Produce dc current for the protection of large transformers

• Increase the current in a relay circuit

• Provide current for solenoid operation of a circuit breaker

• Provide current for the operation of protective devices