Introduction to Health and Safety at Work

EACH
case, 
explain
how the operator is 
protected.
(iii) 
outline FOUR
non-mechanical hazards pre-
sented by the operation, identifying the possible 
health and safety effects in 
EACH
case.
18. A chainsaw is to be used to fell a tree from ground 
level. In relation to this task:
(i) 
identify FOUR
hazards associated with the use 
of the chainsaw
(ii) 
list
the items of personal protective equipment 
that should be used by the chainsaw operative.
19. An employee is to use a petrol-driven chainsaw to fell 
a tree from ground level. 
Outline
the hazards faced 
by the employee in carrying out this task.
20. 
Identify FOUR
hazards when cutting grass on road-
side verges with a rider-operated motor-mower and 
outline
the precautions to be taken in 
EACH
one.
21. 
Outline
the 
FOUR
main categories of guards and 
safeguarding devices that may be used to minimize 
the risk of contact with dangerous parts of machinery.
22. (a)
Describe
when a fi xed guard would be an 
appropriate means of providing protection against 
mechanical hazards
(b) 
Outline
the features of fi xed guards designed to 
minimize the risk of injury or ill health from dan-
gerous parts of machinery.
23. (a)
In relation to machine safety, 
outline
the prin-
ciples of operation of:
(i) interlocked guards
(ii) 
trip 
devices.
(b) 
Other than contact with dangerous parts, 
iden-
tify FOUR
types of danger against which fi xed 
guards on machines may provide protection.
24. (a)
Outline
the principles of the following types of 
machine guard:
(i) 
fi xed guard
(ii) 
interlocked 
guard.
(b)