CLS Risk Assessment & Mitigation 2

Question 1

Which failure mode analysis technique maps out all possible failure modes and their effects on system performance?

Accepted Answer

Failure Mode and Effects Analysis (FMEA)

Answer

FMEA systematically identifies potential failure modes and evaluates their effects on system performance to prioritize risk mitigation.

Question 2

A lubrication technician notices that a gearbox oil temperature has increased by 15°C above its normal operating range. What is the PRIMARY risk this indicates?

Accepted Answer

Accelerated lubricant oxidation and degradation

Answer

Elevated temperature accelerates lubricant oxidation, which degrades the base oil and additives, reducing service life and increasing wear risk.

Question 3

When assessing contamination risk in a hydraulic system, which particle size range is considered most damaging to hydraulic components?

Accepted Answer

Particles in the 5–15 micron range

Answer

Particles in the 5–15 micron range are most damaging because they are large enough to cause wear but small enough to pass through clearances repeatedly.

Question 4

What does a Risk Priority Number (RPN) in FMEA represent?

Accepted Answer

The product of severity, occurrence, and detection ratings

Answer

RPN = Severity × Occurrence × Detection, and is used to prioritize which failure modes require the most urgent corrective action.

Question 5

Which lubrication-related risk is most directly mitigated by implementing a scheduled oil sampling program?

Accepted Answer

Undetected lubricant degradation leading to equipment failure

Answer

Regular oil sampling detects early signs of lubricant degradation, contamination, and wear before they progress to equipment failure.

(CLS) Certified Lubrication Specialist Practice Test

(CLS) Certified Lubrication Specialist Practice Test

CLS Risk Assessment & Mitigation 2