CEM Technical Skills & Application 2

Question 1

When a hydraulic cylinder on a piece of heavy equipment exhibits rod seal leakage, what is the FIRST corrective action a CEM should take?

Accepted Answer

Inspect the rod surface for scoring or pitting before replacing seals

Answer

A scored or pitted rod will destroy new seals immediately, so the rod condition must be assessed before any seal replacement.

Question 2

Which electrical principle is most important when troubleshooting a voltage drop issue in a heavy equipment starting circuit?

Accepted Answer

Ohm's Law applied across each circuit segment

Answer

Ohm's Law (V=IR) allows a technician to measure voltage drop across each connector and cable segment to locate high-resistance faults.

Question 3

A track-type tractor experiences excessive final drive oil temperature. Which condition is LEAST likely to be the cause?

Accepted Answer

Low engine coolant level

Answer

Engine coolant level does not directly affect final drive oil temperature because final drives are not cooled by the engine cooling system.

Question 4

What is the purpose of the load-sensing signal line in a modern hydraulic system?

Accepted Answer

It communicates actual load pressure to the pump compensator to match flow demand

Answer

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.

Question 5

When performing a scheduled undercarriage inspection on a crawler dozer, which measurement BEST indicates overall undercarriage wear status?

Accepted Answer

Track pitch elongation percentage

Answer

Track pitch elongation percentage directly reflects pin-and-bushing wear and is the primary metric for determining remaining undercarriage life.

(CEM) Certified Equipment Manager Practice Test

(CEM) Certified Equipment Manager Practice Test

CEM Technical Skills & Application 2