Electric Safety 7 Question Preview (ID: 51344)


You Are Going To Learn How To Protect Yourself From Electrocution. TEACHERS: click here for quick copy question ID numbers.

A fuse is marked with 10 A , it melts when it receives a current :
a) Below 10 A
b) Equal 10 A
c) More than 10 A
d) None of the choices

The fuse uses to:
a) Protect the electric circuit
b) Prevent the damage of electric appliances
c) Play same role as Circuit breaker
d) All of the choices.

The Ground ,the Fuse and the Circuit breaker are used :
a) To protect human being and electric appliances
b) Sources of electricity
c) Electric meter
d) All of the choices.

The circuit breaker isused :
a) As source of electricity
b) Acts as a lamp
c) Ensures the protection of electric installations
d) All of the choices.

The short circuit of a lamp connected in series with another identical one:
a) Decreases the current in the circuit
b) Increases the current in the circuit
c) The current remains the same
d) None of the above choices

The short circuit of a dry cell done when connected with a wire:
a) Positive pole of dry cell with its negative pole
b) Positive pole with its self
c) Negative pole with its self
d) The short circuit of a lamp connected in series with another identical one:

Short circuit is done when two terminals of an electric appliance is connected with wire
a) Becomes hot
b) Causes dangerous fire
c) Causes damage to the appliance
d) All of the choices.

If the voltage of 25 V in wet place or 50 V in dry place , then the value of current is :
a) Less than 30mA
b) More than 30 mA
c) Less than 15mA
d) All of the choices.

The grounding of washing machine is used to
a) Provides live line electricity
b) Gives neutral line
c) Protect the machine from current over loading
d) Damages the machine

If the electric voltage is 25 V in dry place then:
a) Does not cause Electrocution
b) Causes Suffocation
c) Causes Electrocution
d) None of the choices

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