Electrical Safety Awareness Test



1. What is the lowest level of current that could be fatal (fibrillation of the heart)

A.   1A

B.   100mA (0.1A)

C.   10A

D.   0.5A (500mA)

2. 230V is

A.   A safe voltage to touch

B.   A voltage that will always kill a person

C.   High enough to cause possible harm or death

D.   Irrelevant when it comes to danger

3. Before working on an electrical circuit you must

A.   Make sure the equipment is turned off

B.   Tell your supervisor

C.   Wear rubber gloves

D.   Isolate the supply

4. Electrical connections should be tight and secure because they

A.   Will come loose

B.   Could cause overheating and equipment failure

C.   Will look untidy

D.   Could cause circuit breakers to trip

5. The earth wire is coloured (current standards)

A.   Green and Yellow

B.   Green

C.   Black

D.   Blue

6. The voltage between Live and Neutral is

A.   230V

B.   110V

C.   400V

D.   55V

7. The purpose of earthing is to

A.   Provide a safe current path

B.   Ensure touchable conducting surfaces cannot become live

C.   Trip the circuit breaker

D.   Prevent fires

8. Cables passing more than their intended current can

A.   Become brittle

B.   Cause magnetic interference

C.   Become hot

D.   Trip an RCD

9. What is the purpose of a 30mA RCD (Residual Current Device)

A.   Prevent damage to equipment

B.   Prevent fires

C.   Trip the main circuit breaker

D.   Protect people from harmful electric shock

10. What is the purpose of a fuse, breaker/overload

A.   Prevent electric shock

B.   Prevent too much current flowing in a circuit

C.   Reduce the supply voltage

D.   Provide a convenient method of turning off a circuit

11. Resistance of the human body is generally

A.   Very low

B.   Very high

C.   Insignificant

D.   Variable and unpredictable

12. If a person is receiving an electric shock and cannot let go of the live part you should firstly

A.   Pull them away as quickly as possible

B.   Give them  mouth to mouth resuscitation

C.   Use a non conducting item to separate them from the supply

D.   Disconnect the supply immediately

13. Electrical power (measured in watts) is calculated by

A.   Voltage multiplied by current

B.   Current multiplied by resistance

C.   Voltage divided by current

D.   Current divided by resistance

14. The Live conductor in a 230V supply is coloured (current standards)

A.   Red

B.   Blue

C.   Black

D.   Brown

15. The current in an electrical circuit is determined by the

A.   Supply Voltage

B.   Circuit Resistance

C.   Supply voltage and circuit resistance

D.   The fuse or circuit breaker

16. Current is measured in

A.   Amps

B.   Volts

C.   Ohms

D.   Watts

17. The more current a cable needs to pass, the cable needs to be

A.   Longer

B.   Shorter

C.   Thinner (smaller cross sectional area)

D.   Bigger (greater cross sectional area)

18. The Electricity at Work Regulations 1989 are

A.   A statutory requirement

B.   Relevant for residential dwellings only

C.   A guide for electrical installations

D.   A qualification for electricians

19. What is the maximum voltage that is unlikely to cause harm from electric shock

A.   10V

B.   50V

C.   230V

D.   400V

20. Electrical Isolation may typically be defined as

A.   Turning equipment off

B.   Switching off the supply

C.   Disconnecting an electrical supply and ensuring is stays disconnected

D.   Keeping bodily parts away from live conductors