Electrical

Question 1

What is a conduit?

Answer 1

A tube used to protect electrical wiring.

Question 2

What is energy measured in?

Answer 2

Joules.

Question 3

What is the minimum bending radius for a 20 mm conduit? What is the equation?

Answer 3

50mm
The mm of conduit x 2.5mm

Question 4

The four common sizes of conduit are..?

Answer 4

16mm 20mm 25mm 32mm

Question 5

What type of conduit finish should be used on metal conduit in damp situations and why?

Answer 5

Zinc galvanised because it is a Liquid, Tight Flexible Metal Conduit

Question 6

What are 5 dangerous situations at work?

Answer 6

Wet surfaces
Trip hazards
Working at heights
Overhead working
Open holes and trenches

Question 7

What is asbestosisis and how is it caused?

Answer 7

Scarring on the lungs because the fibres and dust gets trapped in the alveoli

Question 8

What 4 places can you come across asbestos in a work environment?

Answer 8

Floor tiles
Roof tiles
Ceiling tiles
Pipe insulation

Question 9

What is the conductor which connects together the MET and all exposed conductive parts?

Answer 9

Circuit protective conduit

Question 10

What ensures safe inspection, testing and maintenance for all installations?

Answer 10

Dividing the installation into circuits

Question 11

What would provide overload protection?

Answer 11

Circuit breaker

Question 12

What would an overload current result from?

Answer 12

A motor running current exceeding the protective device rating

Question 13

What kind of situation is likely to cause severe, temporary overvoltage in an installation?

Answer 13

Loss of neutral conductor in a low voltage system