Crane Operator Certification Exam Prep · Question
An operator needs to lift a 9,000 kg load to a radius of 18 meters with a 30-meter boom. The load chart shows the following capacities for 30m boom: at 16m radius, 10,000 kg; at 20m radius, 8,000 kg. What is the maximum gross load the crane can lift at 18 meters radius, assuming linear interpolation is permissible?
Using linear interpolation: (10,000 kg - 8,000 kg) / (20m - 16m) = 2,000 kg / 4m = 500 kg/m. For 18m radius (2m past 16m): 10,000 kg - (500 kg/m * 2m) = 10,000
Start free practice for Crane Operator Certification Exam Prep
404 questions · no signup required · 40 free questions per day
Question: An operator needs to lift a 9,000 kg load to a radius of 18 meters with a 30-meter boom. The load chart shows the following capacities for 30m boom: at 16m radius, 10,000 kg; at 20m radius, 8,000 kg. What is the maximum gross load the crane can lift at 18 meters radius, assuming linear interpolation is permissible?
Answer options:
- 9,500 kg ✅ 9,000 kg
- 8,500 kg
- Cannot be determined without a 18m specific entry.
Correct answer: 9,000 kg
Explanation: Using linear interpolation: (10,000 kg - 8,000 kg) / (20m - 16m) = 2,000 kg / 4m = 500 kg/m. For 18m radius (2m past 16m): 10,000 kg - (500 kg/m * 2m) = 10,000 kg - 1,000 kg = 9,000 kg. So the crane can lift 9,000 kg at 18m radius and 30m boom, which matches the required load. CSA Z150 allows linear interpolation to determine capacities between listed values.
Start free practice for Crane Operator Certification Exam Prep
404 questions · no signup required · 40 free questions per day
More about Crane Operator Certification Exam Prep
Related Questions
- 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?
- What is the purpose of an anti-two-block device on a crane?
- Why is it important to keep the load as close to the ground as possible when moving it with a crane?
More for Crane Operator Certification Exam Prep candidates
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?
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Crane Operator Certification Exam Prep Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.