Review Questions - Click On The Picture To Begin...
- 10mph
- 5mph
- 20mph
- 15mph
Quote From The CDL Manual:
Select a safe speed, one that is not too fast for the weight of the vehicle, length and steepness of the grade, weather and road conditions. Once a safe speed has been reached, apply the brake hard enough to feel a definite slowdown.
- When speed has been reduced to 5 mph below the safe speed, release the brakes. (This application should last for about 3 seconds.)
Once speed has increased to the safe speed, repeat the procedure.
Example: If your safe speed is 40 mph, you should apply the brakes once your vehicle speed reaches 40 mph. Your brakes should be applied hard enough to reduce your speed to 35 mph. Once your vehicle speed reaches 35 mph, release the brakes. Repeat this procedure as often as necessary until you have reached the end of the downgrade. This braking technique is called "snubbing."
TruckingTruth's Advice:
Avoid riding the brakes during steep downgrades and choose your correct gear before descending the hill.
- Lightly ride the clutch during the grade
- Race the engine to improve engine braking
- Do not change gears while driving down a grade
- To avoid engine damage, put the gear in neutral and coast down the hill
Quote From The CDL Manual:
When operating any commercial vehicle, do not ride the clutch, race the engine, change gears or coast while driving down the grade. At the bottom of the grade, be sure to cancel the 4-way flashers.
TruckingTruth's Advice:
Always slow down and be in proper gear before a downgrade and never change gears or coast during the downgrade.
- Check traffic thoroughly in all directions and move to the right-most or curb lane
- If legal to do so, use the 4-way flashers if traveling too slowly for the flow of traffic
- Select the proper gear to maintain speed an not lug the engine
- All of these answers are correct
Quote From The CDL Manual:
As you approach an upgrade:
- Select the proper gear to maintain speed and not lug the engine.
- Check traffic thoroughly in all directions and move to the right-most or curb lane.
- If legal to do so, use the 4-way flashers if traveling too slowly for the flow of traffic.
TruckingTruth's Advice:
Check your local and state laws regarding the use of 4-way flashers while driving slowly. Some states require it, while other states prohibit the practice.