SCIENCE 8 - SAFETY DEVICES QUIZ

Kenzo was asked to state the importance of safety devices. Which of the following is NOT true about these devices used at home?

• Safety devices are used to prevent electric shock

• Safety devices cut the flow of current in case of overloading

• Safety devices supply unsteady amount of voltage to protect appliances against overloading

• Safety devices are used to provide alternative route for current in the case of a grounded circuit

The fuse at Bucana Sasahan Barangay Hall has “blown” up many times. Which of the following must NOT be done to solve the problem and prevent it from happening again?

• Buy fuse with standard amperage rating

• Do not use all appliances simultaneously

• Call your barangay electrician to fix your electrical problem

• Use jumper wire or cover the blown fuse with available silver paper

Which electrical device shuts down when there is overloading in the circuit?

• Fuse

• Voltage source

• Circuit breaker

• Electrical switch

Which electrical device blows up when there is overloading in the circuit?

• Fuse

• Voltage source

• Circuit breaker

• Electrical switch

Why is earthing used at home?

• To prevent short circuit

• To cut the circuit in case of overloading

• To reduce the resistance of the appliance

• To provide alternative route of upsurge current in case of grounded circuit

At home, Pauleen noticed that a portion of an electrical wire was worn out, exposing its metallic part. What do you think might happen if Pauleen just ignored this problem?

• short circuit may happen

• circuit is of better condition

• overloading may not happen

• nothing happens when someone touches the wir

What safety measures have been taken by appliance manufacturers to prevent electric shock and grounded external casing of appliances?

• Grounding

• Using AVR

• Double insulation

• Using circuit breaker

How can Amelyn prevent from experiencing electric shock at home?

• Recycle blown up fuse

• Regularly check household wirings

• Plug electrical appliances with wet hand

• Continue using worn-out extension wire

   

When do you consider repairing electrical wirings at home?

• When a newly bought extension cord is used

• When electrical appliances are in good condition

• When fuses blow out or circuit breakers trip off frequently

• When lights do not flicker even if other appliances are turned on

Kenneth gets shocked as he touches an open wire. What kind of hazard had he experienced?

• Thermal 

• Shock 

• Electrical

• Current