CDL Class B Exam Questions &
Answers (Grade A+)
What is the most important reason for doing a vehicle inspection? -
correct answer ✅Safety
What things should you check during a trip? -
correct answer ✅instruments, air pressure gauge, temp gauge,
pressure gauge, ammeter/voltmeter, mirrors, tires, cargo/ cargo
covers, lights.
Name some key steering system parts. -
correct answer ✅steering wheel, tie rod, steering shaft, hydraulic
fluid reservoir, gear box, pitman arm, drag link, steering knuckle,
spindle, steering arm, power steering cylinder
Name some suspension system defects. -
correct answer ✅spring hangers that allow movement of axle
from proper position, cracked or broken spring hangers, missing or
broken leaves in any leaf spring, leaking shock absorbers, air
suspension systems that are damaged and or leaking, any parts of
the suspension or frame that is cracked or broken
What three kinds of emergency equipment must you have? -
correct answer ✅fire extinguisher, 3 reflective triangles, spare
fuses
,CDL Class B Exam Questions &
Answers (Grade A+)
What is the minimum tread depth for front tires? -
correct answer ✅4/32 inch
For other tires? -
correct answer ✅2/32 inch
Why should you back toward the driver's side? -
correct answer ✅Better visibility
If stopped on a hill, how can you start moving without rolling back?
-
correct answer ✅partly engage the clutch before you take your
foot off the brake, put on the parking brake whenever necessary to
keep from rolling back
When backing, why is it important to use a helper? -
correct answer ✅There are blind spots you won't be able to see.
What's the most important hand signal that you and your helper
should agree on? -
correct answer ✅STOP
, CDL Class B Exam Questions &
Answers (Grade A+)
What are the two special conditions where you should downshift? -
correct answer ✅before starting down a hill, before entering a
curve
When should you downshift automatic transmissions? -
correct answer ✅when going down grades
Retarders keep you from skidding when the road is slippery. True or
false? -
correct answer ✅FALSE. When your drive wheels have poor
traction, the retarder may actually CAUSE them to skid and should
be turned off whenever the road is wet, icy, or snow covered
What are the two ways to know when to shift? -
correct answer ✅RPMs or speed
How far ahead does the manual say you should look? -
correct answer ✅12 to 15 seconds
Answers (Grade A+)
What is the most important reason for doing a vehicle inspection? -
correct answer ✅Safety
What things should you check during a trip? -
correct answer ✅instruments, air pressure gauge, temp gauge,
pressure gauge, ammeter/voltmeter, mirrors, tires, cargo/ cargo
covers, lights.
Name some key steering system parts. -
correct answer ✅steering wheel, tie rod, steering shaft, hydraulic
fluid reservoir, gear box, pitman arm, drag link, steering knuckle,
spindle, steering arm, power steering cylinder
Name some suspension system defects. -
correct answer ✅spring hangers that allow movement of axle
from proper position, cracked or broken spring hangers, missing or
broken leaves in any leaf spring, leaking shock absorbers, air
suspension systems that are damaged and or leaking, any parts of
the suspension or frame that is cracked or broken
What three kinds of emergency equipment must you have? -
correct answer ✅fire extinguisher, 3 reflective triangles, spare
fuses
,CDL Class B Exam Questions &
Answers (Grade A+)
What is the minimum tread depth for front tires? -
correct answer ✅4/32 inch
For other tires? -
correct answer ✅2/32 inch
Why should you back toward the driver's side? -
correct answer ✅Better visibility
If stopped on a hill, how can you start moving without rolling back?
-
correct answer ✅partly engage the clutch before you take your
foot off the brake, put on the parking brake whenever necessary to
keep from rolling back
When backing, why is it important to use a helper? -
correct answer ✅There are blind spots you won't be able to see.
What's the most important hand signal that you and your helper
should agree on? -
correct answer ✅STOP
, CDL Class B Exam Questions &
Answers (Grade A+)
What are the two special conditions where you should downshift? -
correct answer ✅before starting down a hill, before entering a
curve
When should you downshift automatic transmissions? -
correct answer ✅when going down grades
Retarders keep you from skidding when the road is slippery. True or
false? -
correct answer ✅FALSE. When your drive wheels have poor
traction, the retarder may actually CAUSE them to skid and should
be turned off whenever the road is wet, icy, or snow covered
What are the two ways to know when to shift? -
correct answer ✅RPMs or speed
How far ahead does the manual say you should look? -
correct answer ✅12 to 15 seconds
