Manitoba Airbrake Practice Exam

What are the factors contributing to the efficiency of air brakes?

1. Driving speed and weather conditions

2. Proper maintenance, adjustments, and the condition of components like hoses and chambers

3. Type of vehicle and load weight

4. Brake fluid type and tire pressure

The correct answer is: Proper maintenance, adjustments, and the condition of components like hoses and chambers

The efficiency of air brakes is primarily influenced by proper maintenance, adjustments, and the condition of components such as hoses and chambers. Air brakes rely on a pneumatic system that requires all parts to be functioning optimally to ensure effective braking. If any components are worn, damaged, or improperly maintained, it can lead to decreased braking performance and potentially hazardous situations. For instance, worn hoses may lead to air leaks, while improperly adjusted slack adjusters can result in insufficient brake force. Similarly, the condition of air chambers affects how effectively the brakes can engage and disengage. Regular inspections and maintenance are essential to ensure that all components are in good working order, thus maximizing the braking system's efficiency and safety. While the other options touch on relevant factors—like vehicle type or load weight affecting braking distance, and weather conditions impacting traction—they do not directly address the specific mechanics of air brake systems and their operational integrity as effectively as the correct choice does.