A commercial driver is preparing a combination vehicle for departure after it has been parked overnight in heavy snow and sub-zero temperatures. In what chronological order should the driver execute the following pre-trip and initial departure procedures according to winter safety standards?
- 1Clear snow and ice from all windows, mirrors, lights, and remove any snow accumulation surrounding the exhaust tailpipe.
- 2Inspect the engine coolant antifreeze rating, drive belts, and verify that the radiator winterfront and shutters are free of ice obstruction.
- 3Start the engine, monitor gauge readings, and verify that the cab heater and defroster blowers operate properly across all speed settings.
- 4Pull forward slowly for a short distance to test steering response and verify that the brake shoes have not frozen to the drums.
Answer
Clear exterior glass, lights, and exhaust tailpipe first; inspect under-hood coolant protection and radiator shutters second; start the engine and verify heater/defroster function third; perform a low-speed roll to verify brake release fourth.
The correct sequence begins with exterior safety and exhaust clearing to eliminate carbon monoxide hazards and establish visibility. Under-hood inspection of antifreeze and radiator winterfronts follows before engine operation. Next, starting the engine enables verification of the cab heating and defrosting apparatus. Finally, a low-speed roll confirms that brake linings have not frozen to the drums before entering active traffic.
Step-by-Step Solution
Key Concept
Systematic winter pre-trip and departure protocols prioritizing life safety, visibility, and brake release verification
Estimated Time:1m 30s