CPSI Rotating Equipment and Rocking Equipment Standards 4 — Questions and Answers
Question 1: A merry-go-round platform has a measured lip height of 2.5 inches at the outer edge. According to ASTM F1487, what is the maximum allowable lip height to prevent tripping hazards?
- 0.5 inches
- 1 inch
- 2 inches (Correct answer)
- 3 inches
Correct answer: 2 inches
ASTM F1487 specifies that platform lips or protrusions on rotating equipment must not exceed 2 inches to minimize tripping and entrapment hazards.
Question 2: During inspection of a spring rocker, the inspector notices the spring coil has a gap of 35 mm when the equipment is in its rest position. What is the primary concern?
- Excessive rust on the coil
- Finger and hand entrapment in the coil gaps (Correct answer)
- The rocker will not return to center
- UV degradation of the spring material
Correct answer: Finger and hand entrapment in the coil gaps
Spring coil gaps between 9 mm and 25 mm (or exceeding maximum limits) create finger and hand entrapment hazards that must be evaluated per ASTM F1487.
Question 3: When assessing the use zone for a rotating tire swing, the inspector should measure the use zone radius from:
- The center pivot point of the swing set
- The outer edge of the tire at full extension in all directions (Correct answer)
- The edge of the swing set frame
- The nearest fixed structure
Correct answer: The outer edge of the tire at full extension in all directions
The use zone for a tire swing extends from the outer edge of the tire at its maximum travel point in all directions to ensure adequate clearance.
Question 4: A spring rocking horse has a maximum displacement angle of 28 degrees from vertical. What does ASTM F1487 specify as the maximum allowable rocking angle?
- 15 degrees
- 20 degrees
- 25 degrees (Correct answer)
- 30 degrees
Correct answer: 25 degrees
ASTM F1487 limits the maximum rocking or gliding angle of rocking equipment to 25 degrees from the vertical rest position to prevent tip-over.
Question 5: An inspector finds that a merry-go-round's bearings produce a rhythmic grinding noise during rotation. The equipment otherwise passes visual inspection. What is the correct action?
- Document and re-inspect in 30 days
- Apply lubricant and clear for use
- Remove from service until bearings are replaced or professionally evaluated (Correct answer)
- Post a warning sign and continue monitoring
Correct answer: Remove from service until bearings are replaced or professionally evaluated
Grinding bearing noise indicates potential mechanical failure that could cause sudden equipment malfunction; the equipment must be removed from service until repaired.
Question 6: According to CPSC Handbook guidelines, what minimum ground clearance must be maintained between the underside of a rotating platform and the ground surface?
- 1 inch
- 3 inches
- 7 inches (Correct answer)
- 9 inches
Correct answer: 7 inches
CPSC guidelines require at least 7 inches of clearance between the lowest moving part of rotating equipment and the ground to prevent crush injuries.
Question 7: A seesaw has a maximum height of 28 inches at its highest point. Which ASTM F1487 requirement is directly relevant to this measurement?
- The fall height used to determine required surfacing depth (Correct answer)
- The minimum weight capacity rating
- The maximum allowable seat temperature
- The required spacing between handgrips
Correct answer: The fall height used to determine required surfacing depth
The maximum height of the seesaw seat determines the critical fall height, which directly dictates the required depth and type of impact-attenuating surfacing beneath the equipment.
CPSI Rotating Equipment and Rocking Equipment Standards 4
A merry-go-round platform has a measured lip height of 2.5 inches at the outer edge.
According to ASTM F1487, what is the maximum allowable lip height to prevent tripping hazards?