A loader operator is assigned to grade a granular base for a new roadway. The design specification calls for a 2% cross slope from the centreline. What is the most appropriate method to achieve and verify this grade using a laser level system?

Question: A loader operator is assigned to grade a granular base for a new roadway. The design specification calls for a 2% cross slope from the centreline. What is the most appropriate method to achieve and verify this grade using a laser level system?

Answer options:

• Set the laser transmitter to a fixed height, then adjust the bucket until the receiver handheld in front of the bucket indicates the correct offset for the 2% slope. ✅ Set the laser transmitter to a 2% slope mode directly if available, then use a receiver mounted on the loader's mast to guide the blade.
• Use a string line set at the desired 2% slope as a visual reference, then manually adjust the bucket to match the string's elevation.
• Install a rotating laser beacon on the loader's roof, linking it to the bucket's hydraulic controls for automatic slope adjustment.

Correct answer: Set the laser transmitter to a 2% slope mode directly if available, then use a receiver mounted on the loader's mast to guide the blade.

Explanation: For achieving a precise slope like 2% on a large area, using a laser transmitter capable of slope mode directly with a mast-mounted receiver on the loader is the most efficient and accurate method. The receiver provides real-time feedback to the operator, often with in-cab readouts, allowing for consistent grade. Handheld receivers or string lines are less efficient and less accurate for continuous machine operation.