CDL General Knowledge Questions with Verified Answers
If you have an air brake restriction... -
ANSWERS - you may not operate a CMV
What is the minimum tread depth for front tires?
For all other tires? - ANSWERS - 4/32 on
What is the most important reason for doing a the front and 2/32 elsewhere
vehicle inspection? - ANSWERS - Safety.
Safety for yourself and other road user.
Name some things you should check on the front
of your vehicle during the walk around
What things should you check during a trip? - inspection? - ANSWERS - Headlights, low
ANSWERS - Watch gauges for signs of and high beam.
trouble.
Windshield wiper arms for proper spring tension.
Use your senses to check for problems
(look,listen,smell,and feel) Wiper blades for damage.
Check critical items when you stop : tires, Reflectors
wheels, rims, brakes, lights, reflectors, electrical
connections to trailers. Turn Signals both left and right.
Name some key steering wheel parts - What should wheel bearing seals be checked
ANSWERS - Gear box for? - ANSWERS - Leaks, Leaks, LEAKS!!
pitman arm
How many red reflective triangles should you
steering knuckle carry? - ANSWERS - Three
steering arm
How do you test hydraulic breaks for leaks? -
tie rod ANSWERS - Pump brake pedal three times
and apply firm pressure to the pedal, hold for five
seconds. The pedal should not move.
Name some suspension system defects -
ANSWERS - Broken leaf spring, spring
hangers that allow movement of axle. Why put the starter switch key in your pocket
U-bolts, or other axle poistioning parts that are during the pre-trip inspection? -
cracked, or damaged. ANSWERS - To keep someone from
running over you.
What 3 kinds of emergency equiptment must you
have? - ANSWERS - Spare electrical fuses Why should you back toward the driver's side? -
ANSWERS - So you can see better
Three red reflective triangles
backing toward the right side is very dangerous
properly charged and rated fire extinguisher.
, CDL General Knowledge Questions with Verified Answers
because you cant see as well.
TRUE OR FALSE:
If stopped on a hill, how can you start moving Engine retarders keep you from skidding when
without rolling back? - ANSWERS - For the road is slippery - ANSWERS - False
manual transmission, partly engage the clutch
before you take your right foot off the brake, or
put the parking brake on whenever necessary to What are the two ways to know when to shift? -
keep you from rolling back. ANSWERS - Use engine speed (rpm) or
road speed (mph)
On a tractor-trailer equipped with a trailer brake
hand valve, the hand valve can be applied to
keep from rolling back. TRUE OR FALSE:
All drivers look ahead, but many don't look far
When stopping a vehicle with a manual enough ahead - ANSWERS - true
transmission, push the clutch in when the engine
is close to - ANSWERS - Idle
How far ahead does the manual say you should
look ahead? - ANSWERS - Most good
When backing, why is it important to use a drivers look at least 12 to 15 seconds ahead
helper? - ANSWERS - There are blind
spots you cant see!
What are some things to look for ahead? -
ANSWERS - Look for vehicles coming onto
What is the most important single you and your the highway, into your lane, or turning.
helper should agree on? - ANSWERS -
stop, stop, stop!! Watch for brake lights from slowing vehicles
by seeing these things far enough ahead, you
What are the two special conditions where you can change your speed, if necessary.
should downshift? - ANSWERS - Before
entering a curve
Whats the most important way to see the sides
Before starting down a hill and rear of your vehicles? - ANSWERS -
WATCH YOUR MIRRORS!!
When should you down shift automatic
transmissions? - ANSWERS - You can By using your mirrors you can see? -
select a low range to get greater engine braking ANSWERS - Tires and cargos
when going down grades
Loose straps, ropes, or chains
The lower ranges prevent the transmission from
shifting up beyond the selected gears ( unless
the governor rpm is exceeded ) TRUE OF FALSE :
If you have an air brake restriction... -
ANSWERS - you may not operate a CMV
What is the minimum tread depth for front tires?
For all other tires? - ANSWERS - 4/32 on
What is the most important reason for doing a the front and 2/32 elsewhere
vehicle inspection? - ANSWERS - Safety.
Safety for yourself and other road user.
Name some things you should check on the front
of your vehicle during the walk around
What things should you check during a trip? - inspection? - ANSWERS - Headlights, low
ANSWERS - Watch gauges for signs of and high beam.
trouble.
Windshield wiper arms for proper spring tension.
Use your senses to check for problems
(look,listen,smell,and feel) Wiper blades for damage.
Check critical items when you stop : tires, Reflectors
wheels, rims, brakes, lights, reflectors, electrical
connections to trailers. Turn Signals both left and right.
Name some key steering wheel parts - What should wheel bearing seals be checked
ANSWERS - Gear box for? - ANSWERS - Leaks, Leaks, LEAKS!!
pitman arm
How many red reflective triangles should you
steering knuckle carry? - ANSWERS - Three
steering arm
How do you test hydraulic breaks for leaks? -
tie rod ANSWERS - Pump brake pedal three times
and apply firm pressure to the pedal, hold for five
seconds. The pedal should not move.
Name some suspension system defects -
ANSWERS - Broken leaf spring, spring
hangers that allow movement of axle. Why put the starter switch key in your pocket
U-bolts, or other axle poistioning parts that are during the pre-trip inspection? -
cracked, or damaged. ANSWERS - To keep someone from
running over you.
What 3 kinds of emergency equiptment must you
have? - ANSWERS - Spare electrical fuses Why should you back toward the driver's side? -
ANSWERS - So you can see better
Three red reflective triangles
backing toward the right side is very dangerous
properly charged and rated fire extinguisher.
, CDL General Knowledge Questions with Verified Answers
because you cant see as well.
TRUE OR FALSE:
If stopped on a hill, how can you start moving Engine retarders keep you from skidding when
without rolling back? - ANSWERS - For the road is slippery - ANSWERS - False
manual transmission, partly engage the clutch
before you take your right foot off the brake, or
put the parking brake on whenever necessary to What are the two ways to know when to shift? -
keep you from rolling back. ANSWERS - Use engine speed (rpm) or
road speed (mph)
On a tractor-trailer equipped with a trailer brake
hand valve, the hand valve can be applied to
keep from rolling back. TRUE OR FALSE:
All drivers look ahead, but many don't look far
When stopping a vehicle with a manual enough ahead - ANSWERS - true
transmission, push the clutch in when the engine
is close to - ANSWERS - Idle
How far ahead does the manual say you should
look ahead? - ANSWERS - Most good
When backing, why is it important to use a drivers look at least 12 to 15 seconds ahead
helper? - ANSWERS - There are blind
spots you cant see!
What are some things to look for ahead? -
ANSWERS - Look for vehicles coming onto
What is the most important single you and your the highway, into your lane, or turning.
helper should agree on? - ANSWERS -
stop, stop, stop!! Watch for brake lights from slowing vehicles
by seeing these things far enough ahead, you
What are the two special conditions where you can change your speed, if necessary.
should downshift? - ANSWERS - Before
entering a curve
Whats the most important way to see the sides
Before starting down a hill and rear of your vehicles? - ANSWERS -
WATCH YOUR MIRRORS!!
When should you down shift automatic
transmissions? - ANSWERS - You can By using your mirrors you can see? -
select a low range to get greater engine braking ANSWERS - Tires and cargos
when going down grades
Loose straps, ropes, or chains
The lower ranges prevent the transmission from
shifting up beyond the selected gears ( unless
the governor rpm is exceeded ) TRUE OF FALSE :
