CTSP Aerial Lift Operations Safety 3 — Questions and Answers
Question 1: What must an operator do before moving a boom truck to a new location with the boom elevated?
- Sound the horn twice
- Retract and lower the boom to the travel position (Correct answer)
- Engage four-wheel drive
- Call a ground spotter to walk alongside
Correct answer: Retract and lower the boom to the travel position
Booms must be fully retracted and lowered to the stowed travel position before driving to prevent tip-over from dynamic forces and clearance hazards.
Question 2: During aerial lift operations, a ground-based crew member must:
- Stand directly beneath the work zone to catch falling debris
- Stay clear of the drop zone and maintain visual communication with the operator (Correct answer)
- Hold the bucket stabilization rope at all times
- Operate the ground controls simultaneously with the operator
Correct answer: Stay clear of the drop zone and maintain visual communication with the operator
Ground crew must stay out of the drop zone to avoid struck-by hazards and maintain sight lines and communication with the bucket operator.
Question 3: What does 'rated work load' (RWL) on an aerial lift refer to?
- The engine torque rating at full RPM
- The maximum combined weight of workers, tools, and materials the basket is designed to carry (Correct answer)
- The maximum weight of the vehicle chassis
- The load at which the outriggers must be deployed
Correct answer: The maximum combined weight of workers, tools, and materials the basket is designed to carry
Rated work load is the manufacturer's specified maximum combined weight capacity of the bucket, including occupants, tools, and materials.
Question 4: An operator notices a hydraulic fluid leak under the truck before starting. The correct action is to:
- Note the leak in the log and monitor it during the shift
- Tag the unit out of service and report it for repair before use (Correct answer)
- Add hydraulic fluid to compensate and proceed with light-duty work
- Use the lift at ground level only until the leak stops
Correct answer: Tag the unit out of service and report it for repair before use
Any hydraulic fluid leak must result in the unit being tagged out of service; operating a leaking lift risks sudden loss of function and catastrophic failure.
Question 5: When positioning outriggers on soft ground, operators should:
- Extend outriggers to half capacity to reduce soil pressure
- Place outrigger pads under the pads to spread the load (Correct answer)
- Avoid using outriggers on soft soil entirely
- Set outriggers on the downhill side only
Correct answer: Place outrigger pads under the pads to spread the load
Outrigger pads distribute the point load over a larger area of soft soil, preventing the outrigger foot from sinking and destabilizing the truck.
Question 6: Which scenario represents an unsafe aerial lift practice under OSHA 1910.67?
- Two workers sharing a bucket within the rated load
- Using the lift controls at the basket during normal operations
- Climbing out of the bucket onto a tree branch to work (Correct answer)
- Wearing a full-body harness attached to the boom anchor point
Correct answer: Climbing out of the bucket onto a tree branch to work
OSHA prohibits climbing out of or leaning over the bucket guardrails; workers must remain inside the basket at all times during aerial lift operations.
Question 7: What pre-operation check confirms the aerial lift's emergency lowering system is functional?
- Activating the emergency descent from the ground controls and verifying slow, controlled lowering (Correct answer)
- Checking that the hydraulic reservoir is at the full mark
- Verifying the truck's parking brake engages properly
- Ensuring the boom locks in the stowed position
Correct answer: Activating the emergency descent from the ground controls and verifying slow, controlled lowering
The emergency lowering function should be tested from the ground controls before each shift to confirm the operator can be retrieved if they become incapacitated aloft.
CTSP Aerial Lift Operations Safety 3
What must an operator do before moving a boom truck to a new location with the boom elevated?