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Worksheetselectrical safety
Total questions: 20
Worksheet time: 10mins
Arc interruption is done by
a) High resistance interruption
b) Low resistance interruption
c) Both (a) and (b)
d) None of these
The neutral wire carries the current...
towards the appliance
out of the appliance
The (a) wire only carries a current when there is a fault.
In a plug, the fuse is connected to the (a) wire.
When the current through a fuse gets too high, the wire inside the fuse will...
create a spark
melt
sound an alarm
do nothing
The fuse used in an electric appliance should be rated __________ than the operating current.
higher
lower
Select the correct advantages of circuit breakers over fuses.
Circuit breakers can be reset.
Circuit breakers are cheaper.
Circuit breakers stop the current faster.
A connection that allows current to take the path of least resistance is a
short circuit
long circuit
parallel circuit
series circuit
What is a device that contains a thin strip of metal that melts if there is too much current through it called?
third prong
circuit breaker
fuse
short circuit
A current is electrically ______ when charges are able to flow directly into Earth.
voltage source
power
series
grounded
static electricity
What connects any metal pieces of an appliance to the ground wire of the building?
third prong
fuse
circuit breaker
short circuit
grounded
What is the term for a reusable safety switch that breaks the circuit when the current gets too high?
third prong
fuse
circuit breaker
short circuit
grounded
What is the term that means electric charges are able to flow directly from the circuit into Earth in the event of a short circuit?
third prong
fuse
circuit breaker
short circuit
grounded
Without a fuse or circuit breaker, what might happen in a house with an overloaded electric circuit?
the thin piece of metal would melt, breaking the circuit
the metal band would heat up, disrupting the circuit
a fire would start
the electricity for the house would turn off
What is the difference between a fuse and a circuit breaker?
a fuse can only be used once and a circuit breaker is reusable
a fuse is reusable and a circuit breaker can only be used once
both fuses and circuit breakers can only be used once
both fuses and circuit breakers are reusable
art of circuit breaker helpful in breaking the current is
a) Trip Coil
b) Contacts
c) Handle
d) Medium
A bird perched on one electrical wire will not get shocked because there is no difference in electrical potential between its feet.
true
false
