Quiz 1 - Hazards and effects of electrical current

What is hazard and a risk?

• Anything that could cause harm

• How serious that harm could be

• Anything that could bring people in safe condition

• How much loss of weight could be

What does it mean?

• Indirect Contact

• Direct Contact

• Earth Fault

• Over current

Direct contact described as touching of active part such as a bare conductor

• True

• False

Which one is protection for indirect contact?

• Apply over load relay protection

• Double layer insulation

• Install fuse or circuit breaker

• Using Residual Current Device

What will happen to the body if leakage current flowing through the body is 50mA on 2 second

• No effect at all

• In most cases no harmful effect

• Increasing probability of ventricular fibrillation up to 5% approx

• Convulsive muscle reaction may occur

Which one in listed below is type of fault?

• Earth fault

• Shock circuit

• Conductor fault

• No battery fault

What is RCD rating for basic protection?

• 19/0.01A

• 40/0.1A

• 40/0.03A

• 40/0.3A

Which method can provide basic and fault protection at the same time?

• Obstacles

• Residual current protection device

• Insulation of active components

• Safety extra low voltage

Please choose electrical equipment using protection class 2

• Hair dryer

• Washing machine

• Cordless Drill

• Kettle

What is the reasons the birds not getting electric shock circuit?

• No current flows

• No voltage pontential

• Bare conductor has high resistance

• Birds have safety shoes