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QUESTION 2
(a) In relation to trench excavation, explain what is meant by the term safe slope.
(1 mark)
(b) State a minimum safety precaution that should be taken when machinery (eg. a digger)
has been used on site and is standing idle.
(1 mark)
(c) List FOUR methods of preventing trench wall collapse while workers are working in
the trench.
1
2
3
4
(4 marks)
(d) Name a safety device that should always be used with portable electrical equipment.
(1 mark)
(e) State the meaning of the following symbol on a portable electrical drill.
(1 mark)
(f) State the purpose of cardiac pulmonary resuscitation (CPR).
(1 mark)
(g) State the THREE common immunisation precautions that should be taken by a drainlayer.
1
2
3
(3 marks)
Total 12 marks
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2a) The steepest slope at which an excavated face is stable against slips or slides.
2b)
2c) 1. Cut the trench wall back to a safe slope
2. Shore up the trench wall
3. Provide a protective shield for workers.
4.
d) Isolating transformer
e) Double insulated appliances
f) This is the combination of rescue breathing and external cardiac compression.
g) 1. Hepatitis a
2. Hepatitis b
3. Tetanus