WorksheetsProtective Devices
Total questions: 10
Worksheet time: 5mins
At home, you noticed that a portion of an electrical wire is worn out, exposing its metallic part. What do you think might happen if you will just ignore this problem?
short circuit may happen
circuit is of better condition
overloading may not happen
nothing happens when someone touches the wire
What electrical circuit condition in which current returns and takes the path of metal casing of an appliance?
short circuit
series circuit
parallel circuit
grounded circuit
Which of the following directs any excess current in the metal casing of appliances to the ground?
fuse
earthing
circuit breaker
electric sockets
What is a circuit breaker?
A type of light switch.
A switch used in an electrical appliance that uses large current.
Used to turn on or off the electrical supply to the whole house.
Used to switch off the electrical supply to one part of the circuit when current in that part of the circuit is too large.
Which is a result of overloading of electrical appliances?
high performance of equipment
inadequate current supply
overheating of wires and fire may occur
none of the above
To prevent overload and overheating of wires
fuses are used
circuit breakers are used
fuses and circuit breakers are used
fuses and resistor are used
Short circuit occurs when the current takes up
more voltage
less voltage
short path
long path
The function of the circuit breaker is
To safeguard the circuit
On and off the circuit
To save human life
None of these
A simple enclosed length of wire that has a low melting point is known as
resistor
fuse
circuit breaker
thermistor
Is an fuse or MCB better ?
Fuse
MCB
