CLP - Commercial Learner's Permit Basic Vehicle Control Questions and Answers 1 — Questions and Answers
Question 1: When making a right turn in a large commercial vehicle, what is the proper technique to prevent the trailer from tracking over the curb?
- Turn late, after the tractor's front axle has passed the corner.
- Swing wide to the left before initiating the turn. (Correct answer)
- Turn as tightly as possible to minimize intersection blockage.
- Increase speed slightly to help the trailer follow the tractor's path.
Correct answer: Swing wide to the left before initiating the turn.
To execute a safe right turn and prevent the trailer from hitting the curb (off-tracking), the driver must create more space. This is achieved by moving the tractor slightly to the left into the next lane before starting the turn, a technique often called a 'button hook' or 'jug handle' turn.
Question 2: A driver is operating a 60-foot combination vehicle at 55 mph in clear, dry conditions. What is the MINIMUM following distance they should maintain?
- 4 seconds
- 5 seconds
- 6 seconds
- 7 seconds (Correct answer)
Correct answer: 7 seconds
The standard rule for minimum following distance is to allow at least one second for every 10 feet of vehicle length when traveling under 40 mph. For speeds over 40 mph, an additional second should be added. For a 60-foot vehicle, this is 6 seconds, plus 1 additional second for speed over 40 mph, totaling 7 seconds.
Question 3: When preparing to back a commercial vehicle, what is the MOST important first step a driver should take?
- Turn on the hazard lights and sound the horn.
- Immediately begin backing slowly while checking mirrors.
- Get out of the vehicle and walk around it to check for hazards. (Correct answer)
- Ask a bystander to act as a spotter.
Correct answer: Get out of the vehicle and walk around it to check for hazards.
The most critical first step before backing is to perform a walk-around inspection of the area. This practice, often called G.O.A.L. (Get Out And Look), allows the driver to identify any obstacles, overhead clearances, ground conditions, or people that may not be visible in the mirrors.
Question 4: Which of the following describes the correct procedure for shifting up gears in a heavy vehicle with a manual transmission, a technique known as 'double clutching'?
- Press the clutch once, shift to the next gear, and release the clutch.
- Release the accelerator, press the clutch, shift to neutral, release the clutch, then press the clutch again and shift to the desired gear. (Correct answer)
- Press the accelerator to match RPMs, then quickly shift without using the clutch.
- Press the clutch, shift to the next gear, and then briefly rev the engine before releasing the clutch.
Correct answer: Release the accelerator, press the clutch, shift to neutral, release the clutch, then press the clutch again and shift to the desired gear.
Double clutching is the standard method for shifting manual transmissions in most heavy commercial vehicles. The process involves using the clutch to shift into neutral and then again to shift into the next gear, allowing the engine and transmission speeds to synchronize.
Question 5: When adjusting the flat mirrors (West Coast mirrors) on a tractor, what is the recommended view?
- The mirrors should be angled down to show only the rear tires.
- They should show the entire side of the trailer and nothing else.
- The mirrors should be positioned to eliminate all blind spots completely.
- They should show a small part of the trailer's side and the lane alongside and behind the vehicle. (Correct answer)
Correct answer: They should show a small part of the trailer's side and the lane alongside and behind the vehicle.
Properly adjusted flat mirrors should show the lanes on both sides and to the rear of the vehicle. You should be able to see the very edge or rear corners of your trailer in the mirror to use as a reference point, ensuring you can monitor traffic and the trailer's position.
Question 6: You are driving a tractor-trailer and need to make a left turn at a multi-lane intersection. What is the proper lane positioning as you approach and begin the turn?
- Swing wide to the right before the turn to give the trailer more room.
- Stay in the right-most lane available for the turn.
- Use the center of the intersection to begin the turn, ensuring the tractor clears the corner before the trailer follows.
- Keep to the left side of your lane and drive deep into the intersection before starting the turn. (Correct answer)
Correct answer: Keep to the left side of your lane and drive deep into the intersection before starting the turn.
For a left turn, you should stay to the left side of your lane and proceed straight into the intersection before beginning the turn. This positioning prevents the trailer from cutting the corner and encroaching on the lanes of other vehicles.
CLP - Commercial Learner's Permit Basic Vehicle Control Questions and Answers 1
When making a right turn in a large commercial vehicle, what is the proper technique to prevent the trailer from tracking over the curb?