Preventive Maintenance Procedures Flashcards
7 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Preventive Maintenance Procedures flashcards as text
What is the purpose of performing an oil analysis during a PM inspection on a compressor?
Answer: To detect contaminants, wear metals, and lubricant degradation before they cause failure
Oil analysis detects wear metals, water contamination, and lubricant degradation, providing early warning of internal component wear before catastrophic failure.
A PM schedule uses condition-based triggers in addition to time-based intervals. Which sensor reading would BEST trigger an early bearing inspection?
Answer: A spike in vibration amplitude at bearing frequency
An increase in vibration amplitude at bearing characteristic frequencies is a reliable early indicator of bearing defects requiring inspection.
When replacing a pump mechanical seal as part of a PM task, the technician should verify which critical dimension?
Answer: The compressed working length of the seal to ensure proper face load
The compressed working length determines seal face contact load; incorrect setting causes either too little sealing force or excessive face wear.
What is the primary hazard when conducting PM on a vessel that previously contained flammable hydrocarbons?
Answer: Presence of residual flammable vapors creating a fire or explosion risk
Residual flammable vapors in vessels or connecting lines can ignite from sparks or open flames during PM activities, causing fire or explosion.
Which maintenance strategy combines scheduled PM tasks with real-time monitoring to achieve the lowest overall maintenance cost?
Answer: Reliability-centered maintenance (RCM) integrating PM and predictive methods
Reliability-centered maintenance (RCM) applies the most cost-effective strategy to each failure mode, combining PM, predictive monitoring, and run-to-failure where appropriate.
A PM task requires inspecting a safety instrumented system (SIS) shutdown valve. What is the MOST critical check?
Answer: Proof-testing the valve to confirm it will fully stroke to the safe position on demand
SIS valves must be proof-tested to confirm they will move to the safe position within the required time when a safety demand occurs.
What is the BEST practice for handling replaced parts and old lubricants after completing a PM task?
Answer: Dispose of them according to plant environmental procedures and regulatory requirements
Used parts and lubricants must be disposed of following plant environmental procedures and applicable regulations such as RCRA to prevent environmental contamination.