Technical Skills & Application Flashcards
7 cards from real CEM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Technical Skills & Application flashcards as text
When a hydraulic cylinder on a piece of heavy equipment exhibits rod seal leakage, what is the FIRST corrective action a CEM should take?
Answer: Inspect the rod surface for scoring or pitting before replacing seals
A scored or pitted rod will destroy new seals immediately, so the rod condition must be assessed before any seal replacement.
Which electrical principle is most important when troubleshooting a voltage drop issue in a heavy equipment starting circuit?
Answer: Ohm's Law applied across each circuit segment
Ohm's Law (V=IR) allows a technician to measure voltage drop across each connector and cable segment to locate high-resistance faults.
A track-type tractor experiences excessive final drive oil temperature. Which condition is LEAST likely to be the cause?
Answer: Low engine coolant level
Engine coolant level does not directly affect final drive oil temperature because final drives are not cooled by the engine cooling system.
What is the purpose of the load-sensing signal line in a modern hydraulic system?
Answer: It communicates actual load pressure to the pump compensator to match flow demand
The load-sensing line transmits work-port pressure back to the variable-displacement pump compensator, allowing it to produce only the flow and pressure the load requires.
When performing a scheduled undercarriage inspection on a crawler dozer, which measurement BEST indicates overall undercarriage wear status?
Answer: Track pitch elongation percentage
Track pitch elongation percentage directly reflects pin-and-bushing wear and is the primary metric for determining remaining undercarriage life.
A wheel loader's automatic transmission fails to upshift under load. After confirming adequate transmission fluid level and condition, what is the NEXT diagnostic step?
Answer: Check the transmission electronic control module for fault codes
Modern powershift transmissions use electronic controls; retrieving fault codes identifies whether the issue is solenoid, sensor, or mechanical before invasive repairs.
Which lubrication film type is present in a properly functioning sleeve bearing operating at rated speed and load?
Answer: Full hydrodynamic lubrication
At rated speed and load, a sleeve bearing develops a full hydrodynamic wedge of oil that completely separates journal and bearing surfaces.