FREE ELDT Questions and Answers
There are no spring brakes on older trailers. Should the air supply disappear:
Explanation: If there is a significant air leak, the emergency brakes (spring brakes) won't engage because they are not present in such trailers. This can result in a loss of braking capability, making it crucial to address air leaks promptly to maintain control and safety. The absence of spring brakes means there won't be a backup braking system to hold the vehicle in place in the event of an air loss.
It is necessary to fully empty the air tanks in order to remove:
Explanation: Draining the air tanks is a maintenance practice in air brake systems to remove accumulated water and oil. Moisture can build up in the air tanks, and draining helps prevent issues such as brake system freezing in cold weather and corrosion. Removing water and oil from the air tanks contributes to the proper functioning and longevity of the air brake system.
Out of the following, which is NOT a hazard?
Explanation: Escape ramps on steep downhill grades are safety features for runaway vehicles, providing a designated area to safely stop and prevent crashes. Unlike hazards such as cardboard boxes on the road, work zones, or downhill freeway exits, escape ramps are designed to mitigate dangers, not pose threats.
How do you move forward on a hill without rolling back?
Explanation: This technique is often referred to as "hill start" or "hill hold." By partially engaging the clutch before releasing the brake, you allow the vehicle to hold its position on the hill without rolling back. If needed, you can also use the parking brake as an additional precaution while transitioning from the brake to the accelerator. This method helps prevent the vehicle from rolling back on an incline when starting from a stop.
Holding on to the emergency brakes requires:
Explanation: Emergency brakes, also known as parking brakes, are typically applied using mechanical force. This can involve a hand lever, foot pedal, or another mechanical mechanism that engages the brakes and holds the vehicle stationary. Unlike service brakes, which may use hydraulic, air, or other pressure systems, emergency brakes rely on a mechanical locking mechanism to secure the vehicle when parked.
When you stop midway on your journey to rest, make sure to check:
Explanation: Checking these components ensures the safety and proper functioning of essential vehicle systems. Regular inspections during breaks help identify any issues early, promoting a safer and smoother journey.
If you have to drive off the road in an emergency, you should:
Explanation: In an emergency, it is generally advised to avoid using the brakes until your speed has dropped to prevent skidding. However, the appropriate response may vary based on specific circumstances. Keeping one set of wheels on the pavement or staying on the shoulder may be advisable in certain situations. Prioritize safety and exercise caution, considering the nature of the emergency and current conditions.
In the event that the air brake system's safety relief valve opens:
Explanation: If the safety relief valve in the air brake system releases air, it signals a problem such as brake system malfunction, overcharging of the air system, or other faults. Addressing and rectifying the issue promptly is crucial to ensure the safe operation of the air brake system.
Air brakes operate when the brake pedal is pushed:
Explanation: Air brakes typically work after a short delay when you push the brake pedal down. The delay is caused by the time it takes for the air pressure to build up in the brake system and apply the brakes. This delay is usually brief, and the brakes engage as the air pressure reaches the required level for effective braking.
It is customary to indicate your intention to turn at least ____ before making a lane change.
Explanation: Signaling your intention to turn at least 100 feet before the actual turn or lane change is a general guideline established for road safety. Providing adequate notice through turn signals allows other drivers on the road to be aware of your intentions, promoting a safer and more organized traffic flow.
The fastest way to know that your trailer is beginning to skid is:
Explanation: Squeaking or screeching noises from the trailer wheels can be an audible indicator of wheel lockup or skidding. This noise occurs when the wheels lose traction and slide instead of rolling. Monitoring for such sounds can provide early warning signs of a potential skid, allowing the driver to respond appropriately to regain control of the vehicle.