CEM Maintenance & Repair Strategies 3 — Questions and Answers
Question 1: Which maintenance KPI measures the average time between consecutive equipment failures?
- Mean Time To Repair (MTTR)
- Mean Time Between Failures (MTBF) (Correct answer)
- Overall Equipment Effectiveness (OEE)
- Failure Mode and Effects Analysis (FMEA)
Correct answer: Mean Time Between Failures (MTBF)
MTBF calculates the average operational time between failures, indicating equipment reliability.
Question 2: A Failure Mode and Effects Analysis (FMEA) is used in maintenance planning to:
- Schedule routine oil changes
- Identify potential failure modes and their impact before they occur (Correct answer)
- Calculate depreciation of equipment assets
- Compare fuel consumption across the fleet
Correct answer: Identify potential failure modes and their impact before they occur
FMEA proactively identifies how components might fail and assesses the severity and likelihood of each failure mode to prioritize prevention efforts.
Question 3: Deferred maintenance is BEST described as:
- Maintenance performed ahead of schedule
- Necessary maintenance that has been postponed to a future date (Correct answer)
- Maintenance outsourced to a third-party vendor
- Warranty-covered repairs handled by the dealer
Correct answer: Necessary maintenance that has been postponed to a future date
Deferred maintenance refers to maintenance tasks that were due but delayed, often increasing the risk of equipment failure and higher future repair costs.
Question 4: In a maintenance cost analysis, which category includes parts, labor, and contracted repair services?
- Capital expenditures
- Direct maintenance costs (Correct answer)
- Overhead allocation
- Depreciation charges
Correct answer: Direct maintenance costs
Direct maintenance costs encompass all expenditures directly tied to maintaining equipment, including parts, technician labor, and outside repair services.
Question 5: What is the purpose of a root cause analysis (RCA) following a major equipment failure?
- Assign blame to the equipment operator
- Identify and eliminate the underlying cause to prevent recurrence (Correct answer)
- Determine warranty eligibility for the failed component
- Calculate the salvage value of the damaged machine
Correct answer: Identify and eliminate the underlying cause to prevent recurrence
RCA investigates the fundamental reason a failure occurred so corrective actions can be implemented to prevent the same failure from happening again.
Question 6: Vibration analysis is a condition-monitoring technique MOST useful for detecting early signs of:
- Fuel contamination
- Bearing wear, imbalance, or misalignment in rotating machinery (Correct answer)
- Hydraulic oil degradation
- Structural frame cracks
Correct answer: Bearing wear, imbalance, or misalignment in rotating machinery
Vibration analysis detects subtle changes in rotating component behavior, allowing early identification of bearing defects, imbalance, and shaft misalignment.
Question 7: When a CEM implements a parts standardization program across a mixed fleet, the PRIMARY benefit is:
- Increased resale value of individual machines
- Reduced parts inventory complexity and lower procurement costs (Correct answer)
- Elimination of all preventive maintenance requirements
- Compliance with EPA emission standards
Correct answer: Reduced parts inventory complexity and lower procurement costs
Parts standardization reduces the number of unique SKUs a fleet must stock, lowering inventory investment and simplifying procurement and technician training.
CEM Maintenance & Repair Strategies 3
Which maintenance KPI measures the average time between consecutive equipment failures?