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 recommended practice when tightening bolts on a flanged joint during PM?
Answer: Tighten bolts in a cross or star pattern to even gasket compression
A cross or star bolt-tightening pattern distributes compressive load evenly across the gasket, preventing leaks and gasket damage.
During a PM inspection, a technician finds mechanical seal faces showing signs of heat discoloration. What is the MOST likely cause?
Answer: Loss of flush or inadequate seal fluid flow causing dry running
Heat discoloration on mechanical seal faces indicates dry running caused by loss of flush flow, which eliminates the lubrication and cooling needed for the seal faces.
What does 'mean time between failures' (MTBF) help a maintenance planner determine?
Answer: The average operational time between equipment breakdowns to optimize PM intervals
MTBF quantifies average equipment reliability and is used to set optimal PM intervals to prevent failures before they occur.
Which condition would cause a relief valve to be flagged for PM replacement or testing?
Answer: The valve shows signs of simmering, leakage, or has reached its inspection interval
Simmering, leakage, or reaching the scheduled inspection interval indicates a relief valve may not function properly and requires testing or replacement.
A coupling alignment check during PM shows an angular misalignment condition. What problem does this cause if left uncorrected?
Answer: Excessive vibration, bearing wear, and potential shaft failure
Angular misalignment creates cyclic bending forces that cause vibration, accelerated bearing and seal wear, and eventual shaft fatigue failure.
What information should always be recorded on a PM work order upon completion?
Answer: Findings, actions taken, parts replaced, measurements, and technician sign-off
Completed PM work orders must document all findings, corrective actions, replaced parts, and measurements to create a traceable maintenance history.
During a PM on a heat exchanger, the technician finds tube fouling. What effect does fouling have on process performance?
Answer: It reduces heat transfer efficiency and increases pressure drop
Fouling deposits act as insulation on heat exchanger tube surfaces, reducing heat transfer coefficients and increasing resistance to fluid flow.