WALMART MAINTENANCE Preventive Maintenance 3 — Questions and Answers
Question 1: When performing preventive maintenance on a hydraulic pallet jack, which component should be inspected for cracks or deformation first?
- The pump handle
- The forks and frame (Correct answer)
- The hydraulic fluid reservoir cap
- The wheel axle bolts
Correct answer: The forks and frame
The forks and frame are structural load-bearing components — cracks or bends directly affect safe operation and must be checked first.
Question 2: A PM checklist item calls for 'inspecting belt tension' on a conveyor. What symptom indicates the belt is too loose?
- Belt runs hotter than normal
- Belt slips or squeals under load (Correct answer)
- Belt surface shows cracking
- Belt tracking drifts to one side only
Correct answer: Belt slips or squeals under load
A loose belt slips and squeals under load because it cannot transfer torque efficiently from the drive pulley.
Question 3: Walmart's preventive maintenance intervals are primarily based on which factor?
- Calendar days only
- Equipment age in years
- Manufacturer recommendations and actual usage hours (Correct answer)
- Store manager preference
Correct answer: Manufacturer recommendations and actual usage hours
PM intervals should follow manufacturer specifications combined with actual usage hours to ensure timely service regardless of calendar time.
Question 4: What is the correct action when a preventive maintenance task reveals a minor oil leak on a piece of equipment?
- Continue use and monitor the leak weekly
- Add more oil to compensate and finish the PM
- Tag the equipment out of service and report to the supervisor (Correct answer)
- Wipe the leak and note it in the log for next PM
Correct answer: Tag the equipment out of service and report to the supervisor
Any confirmed leak requires the equipment to be taken out of service and reported so a repair work order can be generated before further use.
Question 5: Which lubrication practice is most likely to cause damage during preventive maintenance?
- Using the manufacturer-specified grease type
- Applying grease until old grease purges from the fitting
- Over-greasing sealed bearings (Correct answer)
- Wiping excess grease from exposed fittings
Correct answer: Over-greasing sealed bearings
Over-greasing sealed bearings can rupture the seal, pushing lubricant into motor windings or causing the bearing to overheat.
Question 6: During a PM inspection of a dock leveler, the technician notices the lip hinge pins are dry and show surface rust. What is the correct PM response?
- Replace the hinge pins immediately
- Clean, lubricate the pins, and document the finding (Correct answer)
- Paint over the rust and continue
- Leave as-is if the leveler still operates
Correct answer: Clean, lubricate the pins, and document the finding
Surface rust on hinge pins should be cleaned and lubricated per PM procedures; the condition is documented so progression can be tracked.
Question 7: What does the term 'PM compliance rate' measure in a facility maintenance program?
- The percentage of PM tasks completed on schedule vs. total PM tasks due (Correct answer)
- The ratio of corrective repairs to preventive repairs
- The number of equipment breakdowns per month
- The cost of spare parts used during PM activities
Correct answer: The percentage of PM tasks completed on schedule vs. total PM tasks due
PM compliance rate tracks how many scheduled PM tasks were completed on time, indicating how well the maintenance program is being executed.
WALMART MAINTENANCE Preventive Maintenance 3
When performing preventive maintenance on a hydraulic pallet jack, which component should be inspected for cracks or deformation first?