WIRES JOINTS SOLDERING UG CABLES - Quiz

1) What is the purpose of 'serving' layer in underground cable?

Protect the cable from moisture Protect the cable from mechanical injury Protect metallic sheath against corrosion Protect armouring from atmospheric condition

2) Which cable laying method is used in generating station?

In ducts Racks in air Along buildings Direct in ground

3) How many electrons are there in the valence shell of a copper atom?

1 2 8 18

4) What is the effect of electric current on neon lamp?

Heating effect Magnetic effect Chemical effect Gas ionization effect

5) What is the unit of insulation resistance?

Ohm Kilo ohm Milli ohm Mega ohm