Crane Operator Certification Exam Prep · Question
A crane is positioned 8 metres from a 230 kV transmission line. The provincial OHS regulations reference CSA Z150. Given this, what is the minimum required clearance, and is the crane currently operating dangerously close?
For lines over 150 kV to 250 kV, CSA Z150 Table 1 specifies a 7.5-metre clearance. Although 8 metres is numerically greater, the term 'dangerously close' implie
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Question: A crane is positioned 8 metres from a 230 kV transmission line. The provincial OHS regulations reference CSA Z150. Given this, what is the minimum required clearance, and is the crane currently operating dangerously close?
Answer options:
- Minimum 6.0 metres; yes, it's too close.
- Minimum 7.5 metres; no, it's safe at 8 metres. ✅ Minimum 7.5 metres; yes, it's too close if movement is possible.
- Minimum 4.5 metres; no, it's safe at 8 metres.
Correct answer: Minimum 7.5 metres; yes, it's too close if movement is possible.
Explanation: For lines over 150 kV to 250 kV, CSA Z150 Table 1 specifies a 7.5-metre clearance. Although 8 metres is numerically greater, the term 'dangerously close' implies the potential for movement. Effective controls and confirmed distance must be in place. If the 8 metres is the absolute closest possible or movement could bring it closer, it's too close.
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Question explanations
- According to most Canadian provincial regulations, who is ultimately responsible for the safe operation of a c
- A crane's rated capacity decreases as the load radius:
- What is the minimum number of full wraps of wire rope that must remain on a hoist drum when the hook is in its
- Before setting up a mobile crane, what is the most important factor to assess regarding ground conditions?
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