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WorksheetsSCIENCE 8 - SAFETY DEVICES QUIZ
Total questions: 10
Worksheet time: 5mins
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
