CDL Manual Flashcards
Minimum Tread Depth on tires?
4/32 in on front tires
2/32 in on all other tires
Steering wheel play of no more than _____ degrees is allowed?
10 degrees
Air Pressure should build from 50 to 90 psi within ___ minutes with Engine running.
3
Normal Oil Pressures when at idle?
Operating?
5-20 psi at idle
35-75 psi operating.
Normal operating battery voltage on gauge?
Between 12-14 Volts
When driving in incliment weather, what should be done with regard to the Engine Retarder (Jake-Brake)?
Should be turned off.
When driving always look ahead roughly?
12-15 seconds
Define Perception Distance
Distance traveled from time your eyes see hazard, until your brain recognizes it.
Define Reaction Distance
Distance traveled after recognizing issue, before hitting the brakes.
Define Braking Distance
Distance traveled while brakes are applied.
What makes up the total stopping distance?
Perception Distance+Reaction Distance+Braking Distance
Reduce speed by about ____ on a wet road
1/3
Hydroplaning can occur at speeds as low as __ mph?
30 mph
With regard to following distance, what is the formula to determine how far away to be?
1 Second is required for each 10 feet of vehicle length at speeds under 40 mph.
If above 40 mph use same formula, and add an additional second.
If there are two turning lanes, always use the farthest ___ turn lane.
Right
With low beams you can see roughly ____ feet ahead, high beams about ____ to ______ feet.
250 ft Lowbeam
350-500 ft Highbeams
You may have lost ABS control if?
The lamp stays on after bulb check OR goes on once under way.
The most common accident occur where?
Intersections
Stop roughly how far away from railroad crossings before proceding across?
15-50 ft
If equipped with a manual air tank drain, be sure to drain the tanks __________.
Completely, due to water and oil possibly settling at the bottom of the tank.
Low Air Warning signal must come on before the air pressure falls below _____ psi?
60 psi
The emergency brake will activate once pressure drops between ___ to _____ psi?
20 to 45 psi
ABS (Antilock Braking System) is designed to do what?
Keep the wheels from locking up.
If equipped with manual slack adjusters, when checking, if the the adjustor moves more than __ inch, it needs to be adjusted.
1 inch
When testing the air leakage rate, with fully charged air system, turn off the engine, release parking brake, and depress the brake. The loss rate should be less than ____ psi in One minute for single vehicles.
And, ____ psi in One minute for combination vehicles.
3 psi/minute (Single Vehicle)
4 psi/minute (Combination Vehicle)
When checking rate of Air Pressure Buildup the oressure should build from 85 to 100 psi within ___ seconds.
45 seconds
When using air brakes, it can take ____ second or more for air to flow through the lines to the brakes.
1/2 second
When checkinf Engine Compartment Belts, be sure their is no more than ____ to ____ inch play at center of the belt?
1/2 to 3/4 in
