Maintenance & Troubleshooting Techniques Flashcards
7 cards from real ATP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Maintenance & Troubleshooting Techniques flashcards as text
What is the primary purpose of a preventive maintenance (PM) schedule based on manufacturer recommendations?
Answer: To maintain equipment reliability by servicing components before failure
PM schedules proactively address wear and degradation at defined intervals, extending service life and reducing unplanned downtime.
When calibrating a pressure transducer, the technician should compare its output against:
Answer: A traceable reference standard with known accuracy
Calibration requires comparison against a traceable reference standard to ensure measurement accuracy is verifiable and meets certification requirements.
A bearing shows elevated temperature during operation but no change in vibration signature. This most likely indicates:
Answer: Lubrication deficiency before mechanical wear has begun
Heat without vibration change typically points to inadequate lubrication, which creates friction heat before mechanical damage degrades the bearing surface.
When using a megohmmeter (megger) to test insulation resistance, a reading below the minimum acceptable threshold indicates:
Answer: Degraded insulation that could cause leakage current or short circuit
Low insulation resistance means the dielectric material has deteriorated, allowing current to flow where it should be blocked.
The 'half-split' troubleshooting method is best described as:
Answer: Dividing the system at its midpoint to determine which half contains the fault
Half-split (binary search) locates a fault efficiently by testing at the midpoint to eliminate half the possible fault locations with each test.
Which practice is essential when performing maintenance on equipment with stored energy (springs, capacitors, pressure vessels)?
Answer: Applying lockout/tagout and verifying stored energy is fully released before work begins
Lockout/tagout combined with verification that stored energy is released prevents unexpected release that could injure personnel during maintenance.
Vibration analysis on a rotating machine shows a dominant frequency at exactly 1× running speed. This signature most commonly indicates:
Answer: Imbalance in the rotating assembly
A vibration peak at 1× running speed (1× RPM) is the classic signature of mass imbalance in a rotating component.