COMMERCIAL DRIVER LICENSE EXAM
ACTUAL EXAM COMPLETE 400
QUESTIONS WITH
DETAILED ANSWERS
,minimum tread depth in every major groove on front tires - ANSWER4/32 inch
This much tread is needed on other tires not including front - ANSWER2/32 inch
sterring wheel play of more than can make it hard to steer - ANSWER10 degrees or two
inches movement at the rim
Most important reasonf or doing a vehicle inspection - ANSWERsafety for yourself and road users
things to check during a trip - ANSWERgauges, any problems detected by senses, tires, brakes, lights,
trailer connections, cargo securement
A problem with spring hangers could show this - ANSWERproblem with suspension system defects
leaking shock absorbers - ANSWERsuspension system defect
Key steering system parts - ANSWERgear box, pitman arm, drag link, steering ring knuckle, wheel,
Arms, shaft.
3 kinds of emergecy equipment you must have - ANSWERfire extinguisher, electrical fuses, warming
devices
Key suspension parts - ANSWERvehicle frame, front axle, hanger, bearing plates. hydraulic shock
absorber, tourque rock, Spring shackle, Main Spring
Exhaust system defects - ANSWERbroken exhaust pipe or muffler, missing mounting brackets, exhaust
parts rubbing agaisn fuel parts, exhaust parts leaking
Where your key should be during pre-trip inspection and why? - ANSWERin your pocket so no one
runs over you
Order of inspection - ANSWERcheck engine compartment, start engine and isnpect inside of cab, turn
off engine and check lights, do walk around inspection, check signal lights, start the engine and check
brake system,
during walk around inspection, what should you check in the front of your vehicle - ANSWERfront axle,
steering system, windshiel, lights, reflectors, turn signals,
, During walk around, what should you check in left front side of vehicle? - ANSWERdriver door glass
is clean, door latches and locks work, left front wheel, left front suspension, left front brake (drum and
hoses)
Things to check on right side during walk around - ANSWERsafety cab locks, fuel tank, spare tire carrier,
cargo securement
Things to check in rear during walk around - ANSWERLights and reflectors, license plate, splash guards,
cargo secure, rear doors securly closed
Things to check on Left side - ANSWERSame as right but also- battery, vents in cell capts
How many times should you pump the brakes to check for leaks - ANSWER3
how long should you put pressure on pedal to check brakes - ANSWER5
how to know if leak in hydraulic brakes - ANSWERpedal moves after pump and applying pressure
What should wheel bearing seals be checked for? - ANSWERleaks
make sure is on before starting engine - ANSWERparking brake
gauges to look at - ANSWERoil pressure, ammeter, coolant temperature, engine oil temperature,
warning lights and buzzers
optional emergency equipment - ANSWERtire chains, tire changing equipment, list of emergency phone
numbers, accident reporting kit
how many reflective triangles you need - ANSWER3 triangles
Always use the when leaving your vehicle - ANSWERparking brake
How can you start moving without rolling back? - ANSWERpatly engage the clutch before you take foot
off brake or put on parking brake until accelerate
how should you speek on in rain or snow - ANSWERgradually :)
Since backing is dangerous what should you do? - ANSWERavoid backing, try to park so you can pull
forward
If you have to back, what should you do? - ANSWERget out of the vehicle and look at your path, back
slowly and in lowest gear, turn towards driver side, use a helper
ACTUAL EXAM COMPLETE 400
QUESTIONS WITH
DETAILED ANSWERS
,minimum tread depth in every major groove on front tires - ANSWER4/32 inch
This much tread is needed on other tires not including front - ANSWER2/32 inch
sterring wheel play of more than can make it hard to steer - ANSWER10 degrees or two
inches movement at the rim
Most important reasonf or doing a vehicle inspection - ANSWERsafety for yourself and road users
things to check during a trip - ANSWERgauges, any problems detected by senses, tires, brakes, lights,
trailer connections, cargo securement
A problem with spring hangers could show this - ANSWERproblem with suspension system defects
leaking shock absorbers - ANSWERsuspension system defect
Key steering system parts - ANSWERgear box, pitman arm, drag link, steering ring knuckle, wheel,
Arms, shaft.
3 kinds of emergecy equipment you must have - ANSWERfire extinguisher, electrical fuses, warming
devices
Key suspension parts - ANSWERvehicle frame, front axle, hanger, bearing plates. hydraulic shock
absorber, tourque rock, Spring shackle, Main Spring
Exhaust system defects - ANSWERbroken exhaust pipe or muffler, missing mounting brackets, exhaust
parts rubbing agaisn fuel parts, exhaust parts leaking
Where your key should be during pre-trip inspection and why? - ANSWERin your pocket so no one
runs over you
Order of inspection - ANSWERcheck engine compartment, start engine and isnpect inside of cab, turn
off engine and check lights, do walk around inspection, check signal lights, start the engine and check
brake system,
during walk around inspection, what should you check in the front of your vehicle - ANSWERfront axle,
steering system, windshiel, lights, reflectors, turn signals,
, During walk around, what should you check in left front side of vehicle? - ANSWERdriver door glass
is clean, door latches and locks work, left front wheel, left front suspension, left front brake (drum and
hoses)
Things to check on right side during walk around - ANSWERsafety cab locks, fuel tank, spare tire carrier,
cargo securement
Things to check in rear during walk around - ANSWERLights and reflectors, license plate, splash guards,
cargo secure, rear doors securly closed
Things to check on Left side - ANSWERSame as right but also- battery, vents in cell capts
How many times should you pump the brakes to check for leaks - ANSWER3
how long should you put pressure on pedal to check brakes - ANSWER5
how to know if leak in hydraulic brakes - ANSWERpedal moves after pump and applying pressure
What should wheel bearing seals be checked for? - ANSWERleaks
make sure is on before starting engine - ANSWERparking brake
gauges to look at - ANSWERoil pressure, ammeter, coolant temperature, engine oil temperature,
warning lights and buzzers
optional emergency equipment - ANSWERtire chains, tire changing equipment, list of emergency phone
numbers, accident reporting kit
how many reflective triangles you need - ANSWER3 triangles
Always use the when leaving your vehicle - ANSWERparking brake
How can you start moving without rolling back? - ANSWERpatly engage the clutch before you take foot
off brake or put on parking brake until accelerate
how should you speek on in rain or snow - ANSWERgradually :)
Since backing is dangerous what should you do? - ANSWERavoid backing, try to park so you can pull
forward
If you have to back, what should you do? - ANSWERget out of the vehicle and look at your path, back
slowly and in lowest gear, turn towards driver side, use a helper
