ELDT MCQ Questions and Answers 2 — Questions and Answers

Question 1: According to FMCSA regulations, what is the maximum number of hours a property-carrying CMV driver can drive in a single shift?

8 hours
10 hours
11 hours (Correct answer)
14 hours

Correct answer: 11 hours

Property-carrying CMV drivers are limited to 11 hours of driving time within the 14-hour on-duty window after 10 consecutive hours off duty.

Under the Hours of Service regulations (49 CFR Part 395), property-carrying CMV drivers may drive a maximum of 11 hours after 10 consecutive hours off duty. This is separate from the 14-hour on-duty window, which includes all duty time (not just driving). The 11-hour driving limit was established based on fatigue research showing that crash risk increases significantly after 11 hours of driving. Drivers must also comply with the 60/70-hour weekly limits and the 30-minute break requirement. Violations of the 11-hour limit are considered serious safety violations.

Question 2: What is the minimum tread depth required for steer tires on a CMV?

2/32 of an inch
4/32 of an inch (Correct answer)
6/32 of an inch
8/32 of an inch

Correct answer: 4/32 of an inch

FMCSA requires a minimum tread depth of 4/32 inch for steer (front) tires, which is greater than the 2/32 inch minimum for other tire positions.

Federal Motor Vehicle Safety Standards and FMCSA regulations set different minimum tread depth requirements based on tire position: steer (front) tires must have at least 4/32 inch of tread depth because they are critical for steering control and water evacuation; all other positions (drive axle and trailer tires) require a minimum of 2/32 inch. These are measured in the major tread grooves. During a roadside inspection, tires below these minimums will result in an out-of-service violation. Responsible carriers typically replace tires well before reaching minimum depths for safety. Worn steer tires are particularly dangerous in wet conditions because they cannot channel water away from the contact patch.

Question 3: When must a driver place warning devices (reflective triangles) if their CMV is stopped on the shoulder of a highway?

Within 30 minutes
Within 10 minutes (Correct answer)
Only during nighttime
Warning devices are not required on shoulders

Correct answer: Within 10 minutes

Federal regulations require drivers to place warning devices within 10 minutes of stopping on the shoulder, with triangles placed at 10 feet, 100 feet, and 200 feet behind the vehicle.

Under 49 CFR 392.22, when a CMV is stopped on the shoulder or any part of a highway, the driver must place warning devices within 10 minutes. The standard placement is: one triangle within 10 feet of the rear of the vehicle; one triangle approximately 100 feet behind the vehicle; and one triangle approximately 200 feet behind the vehicle. On a divided highway, all three are placed behind the vehicle. On an undivided two-lane road, one triangle is placed 100 feet ahead of the vehicle and the other two behind (at 10 and 100 feet). During the first 10 minutes while setting up triangles, the driver should activate the four-way flashers. These requirements apply day and night, in all weather conditions.

Question 4: What is the purpose of the trailer hand valve (also called the trolley valve)?

To disconnect the trailer air supply
To apply only the trailer brakes independently of the tractor brakes (Correct answer)
To adjust the trailer height
To lock the trailer doors

Correct answer: To apply only the trailer brakes independently of the tractor brakes

The trailer hand valve allows the driver to apply only the trailer brakes without engaging the tractor brakes, useful for testing during coupling and for specific driving situations.

The trailer hand valve (or trolley valve or spike) is a control in the cab that applies air pressure only to the trailer service brakes, independent of the tractor brakes. Primary uses include: performing the tug test during coupling (applying trailer brakes while pulling forward to test the fifth wheel lock); adjusting for trailer sway on slippery roads (though this must be done carefully); and testing trailer brake operation. The trailer hand valve should never be used for routine braking while driving because applying trailer brakes alone can cause the trailer to skid and jackknife. It should never be used as a parking brake because air can leak off over time, releasing the brakes. The proper parking brake is the yellow push-pull valve that applies spring brakes.

Question 5: What is the minimum amount of off-duty time required to reset the 14-hour driving window?

8 consecutive hours
10 consecutive hours (Correct answer)
12 consecutive hours
24 consecutive hours

Correct answer: 10 consecutive hours

A driver must take at least 10 consecutive hours off duty (or 10 hours in sleeper berth, or a qualifying split) to reset the 14-hour driving window.

The 14-hour driving window and 11-hour driving limit both reset only after the driver takes at least 10 consecutive hours off duty. This can be satisfied by: 10 consecutive hours in off-duty status; 10 consecutive hours in the sleeper berth; a combination of off-duty and sleeper berth time totaling 10 consecutive hours; or a qualifying split sleeper berth arrangement (7/3 or 8/2 split with at least 7 hours in the sleeper). The 10-hour requirement cannot be shortened by any means. The purpose is to ensure drivers get adequate rest before starting a new driving period. Once the 10-hour break is completed, both the 14-hour window and 11-hour driving limit reset to their full values.

Question 6: In the context of ELDT, what does 'range training' refer to?

Training on a shooting range for security
Behind-the-wheel exercises performed in a controlled area to practice basic vehicle maneuvers (Correct answer)
Distance calculations for trip planning
Training on radio communication range

Correct answer: Behind-the-wheel exercises performed in a controlled area to practice basic vehicle maneuvers

Range training refers to BTW exercises performed in a controlled, off-road area where students practice basic vehicle control maneuvers such as backing, turning, and coupling before driving on public roads.

Range training is the portion of BTW training conducted in a controlled, off-street environment (typically a large paved area at the training facility). Students practice fundamental vehicle control maneuvers including: straight line backing; offset backing (left and right); alley docking (simulating loading dock approach); parallel parking (for bus students); coupling and uncoupling (for Class A); turning exercises; and basic vehicle control (starting on an incline, shifting through gears). Range training builds the foundational skills needed before students drive on public roads. It is also where students practice the maneuvers that will be tested during the CDL skills test. Training providers must have access to a suitable range area that allows safe practice of all required maneuvers.

ELDT MCQ Questions and Answers 2

According to FMCSA regulations, what is the maximum number of hours a property-carrying CMV driver can drive in a single shift?