ALC ALC Load Capacity & Stability 1 — Questions and Answers
Question 1: Where is an aerial lift's rated load capacity typically displayed?
- On a placard attached to the platform or machine (Correct answer)
- In the operator's personal logbook
- On the work order issued by the employer
- Posted at the job site entrance
Correct answer: On a placard attached to the platform or machine
OSHA and ANSI require the rated load capacity to be posted directly on the lift so operators can always reference it.
Question 2: What is the primary consequence of overloading an aerial lift?
- Loss of stability and increased tip-over risk (Correct answer)
- Faster battery drain
- Reduced fuel efficiency
- Shorter warranty period
Correct answer: Loss of stability and increased tip-over risk
Exceeding the rated load capacity shifts the center of gravity beyond safe limits, dramatically increasing the risk of tip-over.
Question 3: What is the purpose of outriggers on a mobile aerial lift?
- To widen the stability base and prevent tipping (Correct answer)
- To increase the maximum platform height
- To power hydraulic functions
- To store tools and equipment
Correct answer: To widen the stability base and prevent tipping
Outriggers extend the machine's footprint to create a wider, more stable base before the platform is elevated.
Question 4: What factor determines the maximum rated load capacity of an aerial lift?
- The manufacturer's engineering design and testing (Correct answer)
- The operator's weight alone
- The job supervisor's judgment
- The height of the nearest obstacle
Correct answer: The manufacturer's engineering design and testing
The manufacturer establishes rated capacity through engineering analysis and load testing per ANSI A92 standards.
Question 5: What should an operator verify before adding materials to an aerial lift platform?
- The combined weight of personnel, tools, and materials does not exceed the rated load (Correct answer)
- That the lift has a full fuel tank
- That a spotter is standing nearby
- That the platform color matches the safety plan
Correct answer: The combined weight of personnel, tools, and materials does not exceed the rated load
Operators must calculate the total platform load—people plus equipment plus materials—and confirm it stays within the rated limit.
Question 6: Which condition most directly reduces the rated load capacity of a boom lift?
- Extending the boom to a greater working height or reach (Correct answer)
- Operating in daylight hours
- Using the machine on a paved surface
- Wearing personal protective equipment
Correct answer: Extending the boom to a greater working height or reach
As the boom extends further out, leverage forces increase and the rated capacity decreases per manufacturer load charts.
ALC ALC Load Capacity & Stability 1
Where is an aerial lift's rated load capacity typically displayed?