© Infrastructure Health & Safety Association (IHSA)
29 • Institute for Work & Health (IWH)
Practice
Answer the following questions using the back Index and write the sections of the Act
or Regulations in which you found the answer. Use the 4 step process:
• Identify
• Scan
• Locate
• Decide
1. What height must a fence be for public way protection?
2. How must material and equipment be piled or stacked?
3. Where workers should be positioned when receiving a load carried by a crane?
4. When may a worker refuse to use a piece of equipment?
5. Under what circumstances must operators of vehicles, machines and equipment
be assisted by signallers?
6. What colour must a signaller's safety garment (shirt or vest) be?
7. What is the maximum number of broken wires in one rope lay in a wire rope used
for rigging?
8. What is the minimum distance to maintain from 5,000 volt overhead power lines?
9. A worker arrived to a residential site in a delivery truck. He parked the truck on the
street between two driveways. Working alone, he operated his boom crane using
a remote control to unload the truck. During the course of unloading, the boom
came in contact with an overhead power line of 750 volts. The worker was fatally
electrocuted. What was done wrong?
10. A 23,000-pound box beam had been rigged using two web type synthetic slings
in basket configuration. One sling slipped and the beam went down, causing the
second sling to slip. The beam tumbled forward, killing the rigger. Investigation
after the accident showed the beam was wet and greasy. One sling showed
previous wear as abrasion, nicks, cuts and UV damage. As the beam slipped,
friction between the beam and the first sling caused a cut in the sling. Although
abrasion wear pads were used as softeners (edge protectors), the abrasion wear
pads had melted and been cut through by the friction as they slipped with the
slings. What was done wrong?
Added:
practice
exercises
