MEOC Equipment Operation & Controls 2

Question 1

When operating a mini excavator on a slope, which direction should the heavy end of the machine (counterweight) face?

Accepted Answer

Away from the slope (uphill)

Answer

The counterweight should face uphill to lower the machine's center of gravity and reduce rollover risk on slopes.

Question 2

What is the purpose of the auxiliary hydraulic circuit on a mini excavator?

Accepted Answer

To power attachments such as hydraulic breakers or augers

Answer

The auxiliary hydraulic circuit supplies pressurized oil to optional attachments like breakers, augers, and grapples.

Question 3

During a 360° swing, an operator notices the upper structure slows unexpectedly. The most likely cause is:

Accepted Answer

Low hydraulic oil level

Answer

Low hydraulic oil reduces pressure and flow to the swing motor, causing sluggish or slowed rotation.

Question 4

What does the boom priority function do when activated?

Accepted Answer

Gives the boom cylinder priority oil flow over other circuits during combined movements

Answer

Boom priority diverts additional hydraulic flow to the boom cylinder, improving lifting speed during combined arm/bucket operations.

Question 5

An operator is working near an underground utility. Which control technique best limits dig depth accidentally?

Accepted Answer

Use short, controlled arm-in strokes with frequent visual checks

Answer

Short, deliberate arm strokes allow the operator to monitor depth incrementally and stop before reaching utility depth.

(MEOC) Mini Excavator Operator Certification Practice Test