Quiz 3: Protection Against Electric Shock

Please choose the measures to provide basic protection.

• Basic insulation

• Covers or enclosures

• Out of arm reach

• Protection provide by obstacles

What is the name of this device?

• Miniature circuit breaker

• Air circuit breaker

• Residual current device

• Moulded case circuit breaker

Please choose the correct earthing system.

• TN-S

• TT

• TN-C-S

• IT

What is the meaning of this diagram

• Earthing network

• RCD operation

• Basic insulation

• Socket termination

What does it mean?

• Indirect Contact

• Earth Fault

• Direct Contact

• Over current

Which description is true about SELV?

• As long rated voltage of AC 25V or DC 60V, basic protection is required

• The bodies of equipment and circuits must not be grounded on the secondary side

• Secondary side connection of the circuit or equipment bodies is grounded for operational reasons

• Primary side and secondary side must be grounded

Please choose electrical equipment using protection class 1

• Hair dryer

• Cordless Drill

• Food blender

• Kettle

Why there is no effect of electric shock occurs on the bird?

• Bird standing on neutral line

• Both of the bird's feet is high resistance

• Both of the bird’s feet touch the same line

• One of the bird's feet is not touch the line

What is the protection class of this equipment?

• Protection class 1

• Protection class 2

• Protection class 3

• Protection class 4

Which of the following is an insulation material

?

• Polyvinyl Chloride (PVC)

• Unplasticized PVC (uPVC)

• Paper

• Copper