Introduction to Health and Safety at Work

12.8 
Practice NEBOSH questions for 
Chapter 12
1. In relation to electrical safety, 
explain
the meaning of 
the following terms:
(i) ‘isolation’
(ii) 
‘earthing’
(iii) ‘reduced low voltage’
(iv) 
‘overcurrent 
protection’.
2. (a) 
Outline
the danger associated with electricity
(b) 
Outline
the emergency action to take if a person 
suffers a severe electric shock.
3. (a)
Outline
the effects on the human body from a se-
vere electric shock
(b) 
Describe
how earthing can reduce the risk of re-
ceiving an electric shock
(c) 
Outline FOUR
factors that may affect the sever-
ity of injury from contact with electricity.
4. In relation to the use of electrical cables and plugs in 
the workplace:
(i) 
identify FOUR
examples of faults and bad prac-
tices that could contribute to electrical accidents
(ii) 
outline
the corresponding precautions that 
should be taken for 
EACH
of the examples iden-
tifi ed in (i).
5. 
Outline
a range of checks that should be made to 
ensure electrical safety in an offi ce environment.
6. A joiner has received an electric shock from a hand-
held 230 V drill while fi tting fl oorboards to an upstairs 
room of a new property. The drill is fi ve-years-old but 
has not been tested during this time. The injury to the 
joiner was fortunately not serious.
(i)
Identify
the factors that may have limited the se-
verity of injury on this occasion
(ii) 
Outline
the physical effects on the body that 
such contact with electricity could have caused 
under different circumstances
(iii)