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Electric Safety 7
Test Description: You are going to learn how to protect yourself from electrocution
Instructions: Answer all questions to get your test result.
1) If the electric voltage is 25 V in dry place then:
A
Does not cause Electrocution
B
None of the choices
C
Causes Electrocution
D
Causes Suffocation
2) 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
All of the choices.
D
Less than 15mA
3) The grounding of washing machine is used to
A
Protect the machine from current over loading
B
Gives neutral line
C
Provides live line electricity
D
Damages the machine
4) Short circuit is done when two terminals of an electric appliance is connected with wire
A
All of the choices.
B
Causes damage to the appliance
C
Becomes hot
D
Causes dangerous fire
5) The short circuit of a dry cell done when connected with a wire:
A
The short circuit of a lamp connected in series with another identical one:
B
Positive pole of dry cell with its negative pole
C
Negative pole with its self
D
Positive pole with its self
6) The short circuit of a lamp connected in series with another identical one:
A
The current remains the same
B
Decreases the current in the circuit
C
Increases the current in the circuit
D
None of the above choices
7) The circuit breaker isused :
A
All of the choices.
B
Acts as a lamp
C
Ensures the protection of electric installations
D
As source of electricity
8) The fuse uses to:
A
Protect the electric circuit
B
Play same role as Circuit breaker
C
All of the choices.
D
Prevent the damage of electric appliances
9) The Ground ,the Fuse and the Circuit breaker are used :
A
Electric meter
B
All of the choices.
C
To protect human being and electric appliances
D
Sources of electricity
10) A fuse is marked with 10 A , it melts when it receives a current :
A
None of the choices
B
Below 10 A
C
Equal 10 A
D
More than 10 A
*select an answer for all questions
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