Amazon Maintenance Technician Preventive Maintenance & Lubrication 1 — Questions and Answers
Question 1: What is the main goal of a Preventive Maintenance (PM) program in an Amazon fulfillment center?
- Reduce equipment purchase costs
- Detect and correct potential failures before unplanned downtime occurs (Correct answer)
- Eliminate the need for spare parts inventory
- Increase the number of maintenance technicians
Correct answer: Detect and correct potential failures before unplanned downtime occurs
Preventive maintenance is designed to identify and address wear or degradation before it causes unexpected equipment failure and production stoppage.
Question 2: Which lubrication method is BEST suited for hard-to-reach bearings on continuously running conveyor systems?
- Manual grease gun applied during shutdowns
- Auto-lubricator (single-point or multi-point) that delivers grease during operation (Correct answer)
- Splash lubrication from an oil bath
- Dry lubricant spray applied weekly
Correct answer: Auto-lubricator (single-point or multi-point) that delivers grease during operation
Automatic lubricators deliver precise grease amounts to inaccessible bearings during operation, eliminating under- or over-lubrication and the need for shutdowns.
Question 3: What does the NLGI grade number indicate on a grease specification label?
- The grease's operating temperature range
- The grease consistency or thickness (Correct answer)
- The additive package type
- The base oil viscosity in cSt
Correct answer: The grease consistency or thickness
NLGI grades (000 to 6) classify grease consistency; higher numbers indicate stiffer grease, with NLGI 2 being the most common general-purpose grade.
Question 4: Over-greasing a bearing can cause which of the following problems?
- Insufficient lubrication film
- Bearing overheating due to churning and increased friction (Correct answer)
- Corrosion of bearing races
- Under-loading of rolling elements
Correct answer: Bearing overheating due to churning and increased friction
Excess grease creates churning resistance that generates heat, elevating bearing temperature and potentially causing premature failure.
Question 5: What information should be recorded when completing a PM work order in Amazon's CMMS?
- Only the date completed
- Equipment ID, technician ID, tasks performed, parts used, condition notes, and completion time (Correct answer)
- Only parts replaced
- Only whether the task passed or failed
Correct answer: Equipment ID, technician ID, tasks performed, parts used, condition notes, and completion time
Complete CMMS records enable failure trend analysis, parts forecasting, and compliance auditing, requiring all relevant job details to be captured.
Question 6: What does MTBF stand for, and why is it important in PM planning?
- Mean Time Before Failure — helps set PM intervals based on average component life (Correct answer)
- Maintenance Task Breakdown Form — used to write procedures
- Maximum Torque Before Fracture — used in fastener specifications
- Minimum Temperature Before Freezing — used in HVAC scheduling
Correct answer: Mean Time Before Failure — helps set PM intervals based on average component life
Mean Time Between Failures (MTBF) is a reliability metric that helps maintenance planners set appropriate PM intervals to service equipment before failure.
Amazon Maintenance Technician Preventive Maintenance & Lubrication 1
What is the main goal of a Preventive Maintenance (PM) program in an Amazon fulfillment center?