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
, why should you always back towards the drivers side - ANSWERyou can see better and
watch the rear of your vehicle
What is a pull-up - ANSWERwhen backing a trailer, you pull forward to re-position your
vehicle as needed
Why should you use a helper when backing? - ANSWERthere are blind spots you can't
see
what hand signal should you and your helper agree on - ANSWERstop
which direction do you turn the wheel for backing a straight bus - ANSWERtoward the
direction you want to go
which direction do you turn the wheel for backing a trailer - ANSWERin the opposite
direction you want to go
two special conditions when you should downshift - ANSWERbefore starting down a hill
and befor entering a curve
How can you know when to shift up or down - ANSWERUse engine speed (rpm) or road
speed (mph)
purpose of retarders - ANSWERhelp slow a vehicle- reduce brake wear
when should you turn retarder off - ANSWERwhen roads are icy or wet
shift up when - ANSWERwhen you engine reaches the top of the range (rpm)
how far ahead should you look on the highway - ANSWER12 to 15 seconds (quarter of
a mile or one block)
what should you look for when driving (2 main things) - ANSWERtraffic and road
conditions
3 rules for turn signals - ANSWERsignal early, signal continuously, cancel your signal
when stoped on the should of a road how long do you have to put out emergency
warning devices - ANSWER10 minutes
What does communicating mean in safe driving - ANSWERusing your turn signals
appropriately
where should reflectors be placed when stopped at a divided highway - ANSWER10
feet, 100 feet, and 200 feet toward the approaching traffic
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
, why should you always back towards the drivers side - ANSWERyou can see better and
watch the rear of your vehicle
What is a pull-up - ANSWERwhen backing a trailer, you pull forward to re-position your
vehicle as needed
Why should you use a helper when backing? - ANSWERthere are blind spots you can't
see
what hand signal should you and your helper agree on - ANSWERstop
which direction do you turn the wheel for backing a straight bus - ANSWERtoward the
direction you want to go
which direction do you turn the wheel for backing a trailer - ANSWERin the opposite
direction you want to go
two special conditions when you should downshift - ANSWERbefore starting down a hill
and befor entering a curve
How can you know when to shift up or down - ANSWERUse engine speed (rpm) or road
speed (mph)
purpose of retarders - ANSWERhelp slow a vehicle- reduce brake wear
when should you turn retarder off - ANSWERwhen roads are icy or wet
shift up when - ANSWERwhen you engine reaches the top of the range (rpm)
how far ahead should you look on the highway - ANSWER12 to 15 seconds (quarter of
a mile or one block)
what should you look for when driving (2 main things) - ANSWERtraffic and road
conditions
3 rules for turn signals - ANSWERsignal early, signal continuously, cancel your signal
when stoped on the should of a road how long do you have to put out emergency
warning devices - ANSWER10 minutes
What does communicating mean in safe driving - ANSWERusing your turn signals
appropriately
where should reflectors be placed when stopped at a divided highway - ANSWER10
feet, 100 feet, and 200 feet toward the approaching traffic
