Machine Operation and Maintenance Flashcards
7 cards from real Manufacturing and Production practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Machine Operation and Maintenance flashcards as text
What does MTBF stand for in machine maintenance?
Answer: Mean Time Between Failures
MTBF (Mean Time Between Failures) measures the average time a machine operates between unplanned breakdowns, and is a key reliability metric.
Which type of maintenance is performed on a scheduled basis to prevent equipment failure before it occurs?
Answer: Preventive maintenance
Preventive maintenance is scheduled at regular intervals—based on time or usage—to prevent equipment failure before it happens.
What is the primary purpose of lubrication in machine maintenance?
Answer: To reduce friction and wear between moving parts
Lubrication creates a film between moving parts that reduces friction and wear, extending machine life and preventing heat buildup.
What is predictive maintenance?
Answer: Maintenance based on actual equipment condition monitoring data
Predictive maintenance uses condition monitoring technologies—such as vibration analysis and thermography—to predict and prevent failures before they occur.
Which metric combines machine availability, performance rate, and quality rate to measure manufacturing effectiveness?
Answer: Overall Equipment Effectiveness (OEE)
OEE (Overall Equipment Effectiveness) multiplies availability, performance, and quality rates to give a single metric of how effectively a machine is being used.
What is the purpose of a machine baseline measurement in a predictive maintenance program?
Answer: To record normal operating parameters for future comparison
A baseline measurement records normal operating parameters (vibration, temperature, noise) so future readings can be compared to detect developing problems early.
What is the first recommended step when a CNC machine displays an unexpected error code or alarm?
Answer: Consult the machine's operator manual for the error meaning
Consulting the operator manual for the specific error code is the correct first step, as it provides the manufacturer's diagnostic information and recommended corrective actions.