Crane Operator Certification Exam Prep · Question
A 200-tonne mobile crane is set up on outriggers with 1.0 m x 1.0 m pads. To decrease the ground bearing pressure by 50% for a given load, what is the required increase in the area of the cribbing/mats under each outrigger?
To decrease pressure by 50%, the area must double (P = F/A). If the original area is A, and new pressure is P/2, then A_new = F / (P/2) = 2 * (F/P) = 2 * A. Thu
Start free practice for Crane Operator Certification Exam Prep
404 questions · no signup required · 40 free questions per day
Question: A 200-tonne mobile crane is set up on outriggers with 1.0 m x 1.0 m pads. To decrease the ground bearing pressure by 50% for a given load, what is the required increase in the area of the cribbing/mats under each outrigger?
Answer options: ✅ 100% increase
- 50% increase
- 25% increase
- 75% increase
Correct answer: 100% increase
Explanation: To decrease pressure by 50%, the area must double (P = F/A). If the original area is A, and new pressure is P/2, then A_new = F / (P/2) = 2 * (F/P) = 2 * A. Thus, the area must increase by 100% (become twice the original) to halve the pressure. This is a fundamental principle of ground bearing pressure management.
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.