CLP Managing Space and Speed 3 — Questions and Answers
Question 1: When merging onto a highway, a CMV driver should:
- Match the speed of highway traffic before merging (Correct answer)
- Merge slowly so other drivers can adjust
- Stop at the end of the on-ramp and wait for a gap
- Merge at 35 mph regardless of traffic speed
Correct answer: Match the speed of highway traffic before merging
Matching highway traffic speed before merging reduces the speed differential and minimizes the risk of a rear-end collision.
Question 2: How does cargo weight affect the speed at which a CMV should take a turn?
- Heavier cargo allows faster turns due to lower center of gravity
- Cargo weight has no effect on cornering speed
- Heavier or high cargo raises rollover risk, requiring slower turns (Correct answer)
- Only the type of cargo matters, not the weight
Correct answer: Heavier or high cargo raises rollover risk, requiring slower turns
A higher or heavier load raises the center of gravity, making a CMV more prone to rollover when turning, so speed must be reduced.
Question 3: You are driving in heavy rain and notice your CMV is hydroplaning. What should you do?
- Brake hard immediately to regain traction
- Accelerate to push through the water
- Ease off the accelerator and steer straight until tires grip again (Correct answer)
- Turn sharply to move onto a drier lane
Correct answer: Ease off the accelerator and steer straight until tires grip again
During hydroplaning, easing off the throttle and holding a straight path allows tires to re-contact the pavement without causing a skid.
Question 4: What is the safest speed to travel in a construction zone as a CMV driver?
- The posted construction zone speed limit or slower if conditions require (Correct answer)
- The normal highway speed limit minus 10 mph
- Any speed that allows stopping within 100 feet
- The speed of surrounding traffic regardless of posted limit
Correct answer: The posted construction zone speed limit or slower if conditions require
CMV drivers must obey posted construction zone speed limits and reduce speed further if workers, narrow lanes, or other hazards are present.
Question 5: On a two-lane road, a CMV driver approaches a crest hill and cannot see oncoming traffic. The driver should:
- Maintain current speed since right-of-way is established
- Move to the right side of the lane and reduce speed (Correct answer)
- Flash headlights to warn oncoming drivers
- Increase speed to clear the crest quickly
Correct answer: Move to the right side of the lane and reduce speed
Keeping to the right and reducing speed at blind crests gives more reaction time if an oncoming vehicle appears suddenly.
Question 6: Which factor most commonly causes a CMV to exceed a safe speed on a downgrade?
- Incorrect gear selection before starting the descent (Correct answer)
- Tailwind pushing the vehicle faster
- Engine malfunction causing acceleration
- Improperly inflated tires
Correct answer: Incorrect gear selection before starting the descent
If the driver selects too high a gear before the descent, engine braking is insufficient to control speed, causing the vehicle to accelerate.
Question 7: A CMV driver must stop on the side of a highway due to a breakdown. What minimum distance should reflective triangles be placed behind the vehicle?
- 100 feet, 100 feet, 100 feet
- 10 feet, 100 feet, 200 feet
- 10 feet, 100 feet, 300 feet (Correct answer)
- 50 feet, 100 feet, 500 feet
Correct answer: 10 feet, 100 feet, 300 feet
FMCSA regulations require triangles at approximately 10 feet, 100 feet, and 300 feet to the rear to warn approaching traffic.
CLP Managing Space and Speed 3
When merging onto a highway, a CMV driver should: