Maintenance Technician Flashcards
6 cards from real Amazon practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Maintenance Technician flashcards as text
What is the difference between AC and DC current?
Answer: DC flows in one direction; AC alternates direction periodically
DC (Direct Current) flows in one constant direction; AC (Alternating Current) periodically reverses direction.
A maintenance technician is replacing a motor coupling. What hazard must be controlled FIRST?
Answer: Mechanical and electrical energy
Before working on drive components, all mechanical and electrical energy sources must be isolated via LOTO.
What does 'MTBF' stand for and what does it measure?
Answer: Mean Time Between Failures — the average operating time between failures
Mean Time Between Failures is the average time a system operates before the next failure.
A technician notices a burning smell from an electrical panel. What is the CORRECT immediate action?
Answer: Immediately de-energize the panel using LOTO and notify supervision
A burning smell indicates a potential electrical fire or overheating component — immediate de-energization is required.
In a 3-phase motor system, what indicates a 'phase imbalance'?
Answer: The three phases have significantly unequal voltages or currents
Phase imbalance occurs when the three phases of a 3-phase supply are significantly unequal, causing excessive heat and potential motor damage.
What type of lubrication is most commonly used for conveyor belt rollers in an Amazon fulfillment center?
Answer: Grease (NLGI Grade 2)
NLGI Grade 2 grease is the standard lubricant for conveyor roller bearings due to its consistency and staying power.