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 does an elevated bearing temperature during a PM inspection most likely indicate?
Answer: Insufficient lubrication or bearing wear
Elevated bearing temperature typically signals insufficient lubrication, overloading, misalignment, or internal bearing wear.
Which PM task helps prevent cavitation damage in a centrifugal pump?
Answer: Checking and adjusting suction pressure and NPSH conditions
Verifying adequate suction pressure and Net Positive Suction Head (NPSH) prevents cavitation, which erodes impellers and internal pump components.
How does predictive maintenance differ from preventive maintenance?
Answer: Predictive maintenance uses condition monitoring data to determine when maintenance is needed
Predictive maintenance relies on condition monitoring (vibration, temperature, oil analysis) to schedule work based on actual equipment condition rather than fixed intervals.
What is the function of a strainer or filter in a PM inspection on a process system?
Answer: To remove particulates that could damage downstream equipment
Strainers and filters trap particulates to protect downstream pumps, valves, and instruments from erosion and plugging.
A PM procedure requires replacing a V-belt drive. What inspection step is essential AFTER installation?
Answer: Checking belt tension and sheave alignment
After V-belt installation, correct tension and sheave alignment must be verified to prevent slipping, excessive wear, or bearing overload.
When mixing lubricants during a PM task, what is the MAIN concern?
Answer: Incompatibility between different lubricant base stocks or additive packages
Mixing incompatible lubricants can cause additive precipitation, viscosity changes, or sludge formation that degrades lubrication performance.
Which PM activity helps ensure accurate flow measurement in a process plant?
Answer: Draining the flow transmitter impulse lines of any accumulated liquid or gas
Draining or venting impulse lines removes condensate or trapped gas that can cause erroneous differential pressure readings on flow transmitters.