PART 5 (DIPLOMA)

Which method of installing a cable in a building void is permitted?

Hint: SBC Table 52-2

• on insulators

• in skirting trunking

• without fixings

• on a support wire

Which area is regarded as a medical location in the Saudi Building regulations?

Hint: SBC Chapter 710

• Doctor's reception area

• Hospital waiting room

• Children's nursery

• Treatment room

What is classified as a hazardous location in Saudi Building regulations?

Hint:

SBC definitions

SBC Table 721-1

• an area where there is inert gas present

• an area where there are explosive gas present

• an area containing rotating machinery

• an area containing switchgear

Where can underground cables without additional protection be used in a caravan park?

• anywhere in the park, if buried at least 300 mm deep

• only in areas where there is caravan traffic

• only within caravan pitch area

• outside the area of a caravan pitch

Which installation method is suitable for an underground system?

• thermosetting insulated and sheathed cable laid directly in the ground

• thermosetting insulated steel wired armoured cable laid directly in the ground

• thermoplastic insulated cable installed directly in a concrete duct

• thermosetting insulated and sheated flexible cable in a steel conduit

What is the maximum permitted voltage to earth for a reduced low voltage single-phase system used on a construction site?

Hint: SBC 704: 41-0.3

• 220 V

• 110 V

• 55 V

• 25 V

What color is used to identify Line 2 of a three-phase power circuit?

• blue

• black

• brown

• gray

Which area is considered to be hazardous location in the Saudi Building Regulations?

Hint: SBC 721-1; SBC 710:51-2.2.1.1

• Area containing a bath or shower.

• Area with a high concentration of water vapors.

• Area including a restrictive conducting location.

• Area with a concentration of flammable vapors.

What is an advantage of an underground wiring system when compared with an overhead wiring system?

• It is easily accessible.

• It is cheaper to install.

• It will use a smaller csa conductor.

• It is protected from damage by winds

Extra-Low-Voltage system is a system that has a voltage that does not exceed:

• 70 V a.c. or 140 V ripple-free d.c

• 50 V a.c. or 120 V ripple-free d.c

• 80 V a.c. or 130 V ripple-free d.c

• 60 V a.c. or 150 V ripple-free d.c