MMC Predictive & Preventive Maintenance 2

Question 1

Which oil analysis parameter is most useful for detecting bearing wear in rotating equipment?

Accepted Answer

Ferrographic particle count

Answer

Ferrographic particle count identifies ferrous wear particles shed by bearings, providing early warning of mechanical degradation.

Question 2

A PM task requiring lubrication every 500 operating hours is best triggered by which method?

Accepted Answer

Equipment runtime meter

Answer

An equipment runtime meter directly tracks actual operating hours, ensuring lubrication is performed at the correct interval regardless of calendar time.

Question 3

What does a rising trend in ultrasonic decibel readings from a steam trap most likely indicate?

Accepted Answer

Trap is blowing live steam (failed open)

Answer

A steam trap failed open passes live steam continuously, generating elevated high-frequency ultrasonic noise detectable with an ultrasonic instrument.

Question 4

In a preventive maintenance program, 'task bundling' refers to:

Accepted Answer

Grouping multiple PM tasks on the same equipment during a single shutdown

Answer

Task bundling reduces total downtime by performing several PM activities on one piece of equipment during a single planned outage.

Question 5

Which condition monitoring technique measures changes in the physical properties of lubricating oil without sending samples to a lab?

Accepted Answer

In-line oil quality sensor

Answer

In-line oil quality sensors measure real-time parameters such as dielectric constant, moisture, and viscosity directly in the lubrication system.

(MMC) Maintenance Management Certification Practice Test

(MMC) Maintenance Management Certification Practice Test

MMC Predictive & Preventive Maintenance 2