Preventive Maintenance & Lubrication Flashcards
6 cards from real Amazon Maintenance Technician practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Preventive Maintenance & Lubrication flashcards as text
What is the main goal of a Preventive Maintenance (PM) program in an Amazon fulfillment center?
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.
Which lubrication method is BEST suited for hard-to-reach bearings on continuously running conveyor systems?
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.
What does the NLGI grade number indicate on a grease specification label?
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.
Over-greasing a bearing can cause which of the following problems?
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.
What information should be recorded when completing a PM work order in Amazon's CMMS?
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.
What does MTBF stand for, and why is it important in PM planning?
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.