elec ppt 7

What is the unit of resistance?

• Ohm

• Volt

• Ampere

• Watt

What is the normal unit for stating the size of a cable?

• cm²

• mm²

• m²

• km²

What is the recommended cable size for lighting according to the document?

• 1.5mm² twin and earth

• 2.5mm² twin and earth

• 6.0mm² twin and earth

• 10.0mm² twin and earth

Which cable size is suggested for a ring final main?

• 1.5mm² twin and earth

• 2.5mm² twin and earth

• 6.0mm² twin and earth

• 10.0mm² twin and earth

Which of the following is a type of cable mentioned in the document?

• PVC

• Rubber

• Steel

• Glass

What might happen to cable insulation if the temperature is too high?

• It may melt

• It may freeze

• It may expand

• It may contract

What is the purpose of ingress protection (IP)?

• To define levels of sealing effectiveness

• To measure electrical conductivity

• To assess temperature resistance

• To evaluate color coding

What does IP stand for in the context of electrical enclosures?

• Ingress Protection

• Internal Pressure

• Insulation Performance

• Impact Power

What kind of bodies does IP protect against?

• Foreign bodies like tools and dirt

• Electrical currents

• Temperature changes

• Color variations

What is the primary focus of intrusion protection ratings?

• Protection against solid objects and dust

• Protection against water

• Protection against heat

• Protection against chemicals