Chapter 7 (2) : Electrical Installation Systems

The installation of electricity in building can be divided into:

• Fittings

• Wiring

• Earthing System

• All of the above answer

What is the primary purpose of earthing in an electrical system?

• To increase the voltage supply.

• To enhance the speed of electrical flow.

• To store electrical energy for later use.

• To reduce the risk of electric shock from leakage current.

What can happen if an electrical system is not properly earthed?

• The power supply becomes unstable.

• There is a risk of severe electric shock.

• Appliances will stop working.

• The system will consume more electricity.

What is the main function of the electric meter in a building's wiring system?

• To record the electricity consumed in kilowatt-hours.

• To supply electricity to the house.

• To regulate voltage levels.

• To protect appliances from power surges.

What is the purpose of a fuse in an electrical system?

• To supply electricity to appliances.

• To store electrical energy.

• To convert electricity to a lower voltage.

• To protect against excess current.

What are the two main types of wiring circuits used in buildings?

• Ring Circuit and Loop Circuit

• Radial Circuit and Parallel Circuit

• Ring Circuit and Radial Circuit

• Series Circuit and Parallel Circuit

Which wiring system is generally considered more cost-effective due to reduced copper usage?

• Radial Circuit

• Ring Circuit

• Series Circuit

• Parallel Circuit

Which of the following is NOT one of the main electrical fittings?

• Cable

• Conduit

• Trunking

• Circuit Breaker

What are the two types of cables used in electrical installation?

• PVC insulation and Copper Core

• PVC insulation and Mineral insulated copper covered cable

• Aluminum Wire and Steel Wire

• Fiber Optic and Coaxial

Which material is used for conduit fittings in electrical wiring?

• PVC and Steel

• PVC and Aluminum

• Copper and Rubber

• Steel and Fiber