Basic ELDT Flashcards

As part of a pre-trip inspection, the driver should approach a car and check below for everything listed below, with the exception of:

Answer: Windshield wiper fluid

During a pre-trip inspection, a driver should check for leaks of fluids like oil, grease, and coolant underneath the vehicle, as these indicate potential mechanical issues. Windshield wiper fluid, however, is contained within a reservoir and is not typically checked by looking for leaks on the ground. Its level is usually checked by visually inspecting the reservoir or using a dashboard indicator.

You should refrain from blowing your horn:

Answer: alert other drivers that they made a mistake

The horn is a safety device intended to warn others of potential danger or to make your presence known. It should not be used to express anger or frustration, such as alerting other drivers that they made a mistake. Using the horn aggressively can escalate situations and is not its intended purpose.

Which of the following DOES NOT indicate that you are tired?

Answer: Starting a discussion with a passenger

Starting a discussion with a passenger can actually help keep a driver alert and engaged, especially on long trips, and is not an indicator of fatigue. In contrast, yawning repeatedly, having difficulty keeping one's head up, and having trouble recalling recent miles are all classic signs of driver fatigue. These symptoms indicate a dangerous level of tiredness that impairs driving ability.

Engine belt looseness will:

Answer: improperly turning the fan and/or water pump, which will cause an overheating incident.

Loose engine belts can prevent critical components like the fan and water pump from turning properly. The fan is essential for cooling the engine, and the water pump circulates coolant. If these components are not functioning correctly due to a loose belt, the engine will quickly overheat, potentially causing severe damage.

The majority of large cars need ________ shift gears.

Answer: double clutching

The majority of large commercial vehicles, especially older models or those with non-synchronized transmissions, require double clutching to shift gears smoothly and efficiently. This technique involves pressing the clutch, shifting to neutral, releasing the clutch, matching engine RPMs, pressing the clutch again, and then shifting into the next gear. It ensures proper gear engagement and prevents transmission damage.

ABS intends to:

Answer: not alter your usual breaking capability.

Anti-lock Braking Systems (ABS) are designed to prevent the wheels from locking up during hard braking, allowing the driver to maintain steering control. ABS does not inherently reduce your stopping distance or increase your average speed. Its primary function is to enhance vehicle control during emergency braking, not to alter the fundamental braking capability or distance.

When brakes fail during a lengthy descent, you ought to:

Answer: if there is an escape ramp, utilize it.

If brakes fail during a lengthy descent, the safest and most effective course of action is to utilize an escape ramp if one is available. Escape ramps are specifically designed to bring runaway vehicles to a safe stop using gravity, sand, or gravel. Applying the parking brake or stopping the engine can lead to loss of control or further damage.

The speed restriction as posted:

Answer: ought never to be exceeded.

The posted speed limit represents the maximum safe speed under ideal conditions and should never be exceeded. Driving above the speed limit is illegal and significantly increases the risk of accidents, as it reduces a driver's reaction time and increases stopping distances. It is a legal requirement, not merely a recommendation.

On a steep descent, applying brakes is:

Answer: an addition to the engine's braking power.

On a steep descent, applying the service brakes is an essential addition to the engine's braking power. Engine braking, achieved by downshifting, helps control speed, but the service brakes are still necessary to manage and maintain a safe speed. Using both together prevents the service brakes from overheating and failing, which can happen if they are used exclusively.

If the trailer doors are heated when you find a fire, you should not open them for the following reasons:

Answer: Allowing air to enter via the doors could cause the fire to flare up.

If trailer doors are hot due to a fire inside, opening them can introduce oxygen, which will cause the fire to flare up and intensify rapidly. This phenomenon is known as a backdraft or flashover. It is crucial to keep the doors closed to contain the fire and prevent it from growing larger and more dangerous.

What makes hydroplaning most likely to happen:

Answer: shortly as the rain begins.

Hydroplaning is most likely to occur shortly after rain begins because the initial rainfall mixes with oil, grease, and dust on the road surface, creating a very slick film. This film, combined with water, makes it easier for tires to lose contact with the road at speed. After prolonged rain, much of this initial film is washed away, potentially reducing the immediate risk of hydroplaning, though wet roads always pose a risk.