CDL Class B Quiz Questions with
verified solutions A+ Grade
2024\2025
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
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
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
What are two main things to look ahead for?
- correct answer Look for vehicles coming onto the highway, into your lane, or turning. / Watch for
brake lights from slowing vehicles
verified solutions A+ Grade
2024\2025
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
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
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
What are two main things to look ahead for?
- correct answer Look for vehicles coming onto the highway, into your lane, or turning. / Watch for
brake lights from slowing vehicles
