Heavy Equipment Operator - Excavator — Red Seal

Common Occupational Skills

An operator must hold a precise depth across a long footing. Which grade-checking method gives a continuous reference plane?

1. A single measuring tape read from the spoil pile
2. A handful of stakes placed by eye along the trench
3. The machine hour meter compared with yesterday's reading
4. A rotating laser receiver set to the design elevation

A rotating laser establishes a continuous reference plane that a receiver reads anywhere on the footing, so depth stays consistent over a long run. A measuring tape read from the spoil pile gives only isolated spot checks from an unstable datum and drifts as the pile moves. Stakes placed by eye are not surveyed to elevation and cannot define a true plane. The hour meter records run time for servicing and has no relation to grade. The laser is selected because it projects one fixed elevation the operator can verify continuously.

NOA 2015 | A-1.03 Uses grade checking and tracking instruments

Heavy Equipment (Excavator) Inspection and Basic Maintenance

During the pre-operational engine-compartment check, which items does the operator confirm?

1. Only the radio reception and the cab air-conditioning setting
2. Oil level, coolant, belts, hoses, and debris around hot parts
3. Just the colour of the exterior decals and warning stickers
4. Only the comfort setting of the operator's seat and armrest

The engine-compartment portion of the pre-op confirms oil level, coolant, belts, and hoses and clears debris from around hot parts, since a low fluid, a worn belt, or trash near the exhaust can cause a breakdown or fire. Checking radio reception is a comfort item unrelated to engine readiness. Looking at the colour of the decals reveals nothing mechanical. Adjusting the seat comfort setting improves ergonomics but is not part of verifying the engine. Confirming fluids, belts, hoses, and clearing debris is what protects the engine before start-up.

NOA 2015 | B-5.01 Performs pre-operational inspections

Heavy Equipment Operator (Excavator) Tasks

When tramming an excavator across a slope, how should the machine be oriented for stability?

1. Travel with the heavy end pointed up the slope
2. Travel with the boom swung fully to the downhill side
3. Travel across the slope as fast as the machine allows
4. Travel with the bucket raised high above the cab

On a slope the machine travels with the heavy end pointed uphill, which keeps the centre of gravity over the high side and resists a tip-over. Swinging the boom fully to the downhill side shifts weight the wrong way and reduces stability. Travelling across the slope as fast as the machine allows adds momentum that can start a roll. Raising the bucket high above the cab lifts the centre of gravity and makes the machine top-heavy. Keeping the heavy end up the slope is the orientation that holds the machine stable.

NOA 2015 | C-6.01 Maintains control of equipment