Maintenance & Inspection Flashcards
7 cards from real MEOC 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 & Inspection flashcards as text
After completing a repair that required opening the hydraulic system on a mini excavator, what must be done before resuming normal operation?
Answer: Bleed air from the system by cycling all cylinders and motors slowly before loading the machine
Air introduced during repairs must be purged by slowly cycling all hydraulic functions to prevent cavitation damage to pumps and erratic actuator movement.
Which OSHA or industry standard governs the requirement to perform pre-operation inspections on construction equipment such as mini excavators?
Answer: OSHA 29 CFR 1926 Subpart O (Motor Vehicles, Mechanized Equipment)
OSHA 29 CFR 1926 Subpart O requires daily pre-operation inspections and that defects affecting safety be repaired before the equipment is used.
What is the danger of operating a mini excavator with a loose or missing track shoe bolt?
Answer: Track shoe loss during operation can cause sudden loss of traction and potential injury to bystanders
A loose or missing track shoe bolt can cause the shoe to detach at speed, becoming a dangerous projectile and compromising machine stability.
When performing a walk-around inspection, how should an operator check for hydraulic cylinder rod seal leaks?
Answer: Visually inspect the rod surface for oil film, staining, or drips while the cylinder is in use
Rod seal leaks are identified by inspecting the exposed cylinder rod for oil film, staining, or active drips, which appear when the rod is extended under pressure.
What is the purpose of checking the mini excavator's electrical ground connections during a maintenance inspection?
Answer: To prevent voltage drop, corrosion-related starting failures, and electrical system malfunctions
Poor ground connections cause voltage drop, intermittent electrical faults, corrosion-accelerated failures, and can prevent reliable engine starting.
Which condition found during a maintenance inspection would require an immediate halt to operations and machine quarantine?
Answer: A visible crack in the boom weldment or structural attachment point
A crack in a structural weldment like the boom is a critical failure risk that could cause the attachment to collapse under load, requiring immediate removal from service.
How should a mini excavator be positioned when checking the engine oil dipstick to get an accurate reading?
Answer: On level ground with the engine off for several minutes
Accurate dipstick readings require a level surface and engine shutdown for several minutes to allow oil to drain back into the sump from the engine passages.