You do not want to live in a truck. You want to sleep in your own bed every night, see your kids before they leave for school, and still make $60,000 to $90,000 a year. That is the Class B CDL in a nutshell - straight trucks, dump trucks, concrete mixers, delivery vans, city buses, and garbage trucks. All home daily.
But the permit exam still catches people. You need to pass General Knowledge (50 questions) and Air Brakes (25 questions). Skip the Combination Vehicles test entirely - that is Class A territory. Kingpins, fifth wheels, and coupling procedures will not be on your exam.
This class b cdl license practice test focuses on exactly what the DMV tests for a Class B permit. No filler, no Class A material. Study this guide, work through the practice questions, and walk into the DMV ready.
Class B vs Class A: What You Do Not Need to Study
Do not waste time on these topics - they are not on the Class B exam:
- Combination Vehicles: Fifth wheels, kingpins, coupling/uncoupling sequences, trailer air systems
- Doubles and Triples: Converter dollies, crack-the-whip effect, T endorsement material
- Trailer backing: You drive a single vehicle, not a tractor-trailer combination
What you DO need to study:
- General Knowledge: Vehicle inspection, basic control, space management, hazard perception, night driving, emergency procedures
- Air Brakes: How air brake systems work, PSI values, leak tests, slack adjusters, governor cut-in and cut-out
The class b cdl license practice test below covers both areas.
The Weight Rules (The Most Missed Question)
The DMV will ask you about weight classifications. Memorize this:
- Class B covers: A single vehicle with a GVWR of 26,001 lbs or more
- The trailer rule: You CAN tow a trailer with a Class B, but the trailer must weigh 10,000 lbs or less
- The trap: If you hook up a trailer that weighs 10,001 lbs or more, you are now operating a Class A combination and your Class B CDL is invalid. The fine for driving out of class is severe.
This question shows up on virtually every class b cdl license practice test in every state.
Air Brakes: The Numbers You Must Memorize
Air brakes are the section where most people lose points. Not because the concepts are hard, but because the test asks for exact PSI values and you either know them or you do not.
| Measurement | Value | What It Means |
|---|---|---|
| Governor cut-out | ~125 psi | Compressor stops pumping |
| Governor cut-in | ~100 psi | Compressor starts pumping again |
| Low air warning | Below 60 psi | Buzzer and light activate |
| Static leak (straight truck) | Max 2 psi/min | Engine off, brakes released |
| Applied leak (straight truck) | Max 3 psi/min | Brakes pressed, engine off |
| Spring brake engagement | 20-45 psi | Parking brakes activate automatically |
Brake lag distance: At 55 mph, it takes approximately 32 feet for air pressure to travel from the brake pedal to the brake chambers at all wheels. Add this to your perception distance and reaction distance to get total stopping distance.
The snubbing method: On a long steep downgrade, do not ride the brakes with light steady pressure. That causes brake fade. Instead, apply the brakes firmly until your speed drops 5 mph below your safe speed, then release. Repeat as needed. This keeps the drums cool.
Practice Questions: Class B CDL License Practice Test
The single vehicle is over 26,001 lbs GVWR (Class B territory). The trailer is under 10,000 lbs, so it does not push you into Class A. This is the classic **class b cdl license practice test** question - know the 10,000 lb trailer threshold.
The governor controls the compressor. Cut-out (stops pumping) is around 125 psi. Cut-in (starts pumping again) is around 100 psi. If pressure somehow exceeds 150 psi, the safety relief valve opens.
Light steady pressure causes brake fade - the drums overheat and expand, reducing braking power. The snubbing method (apply firmly, release, repeat) allows the drums to cool between applications. Never coast in neutral on a downgrade.
The buzzer and warning light must trigger before 60 psi. If you see or hear this warning while driving, you have a serious leak. Pull over immediately.
35 feet / 10 = 3.5, round up to 4 seconds base. Speed is over 40 mph so add 1 second. Total = 5 seconds. For a Class B straight truck, this formula works for any vehicle length.
Straight truck applied leak test: 3 psi/min. Straight truck static leak: 2 psi/min. Combination vehicle applied: 4 psi/min. Combination static: 3 psi/min. Know all four values.
Jobs You Can Get With a Class B CDL
The class b cdl license practice test is your gateway to home-daily careers:
- Dump truck driver: Construction, demolition, and aggregate hauling. $45,000 to $70,000.
- Ready-mix concrete driver: High hourly rates, union protection in many markets. $50,000 to $80,000.
- Delivery driver (FedEx, UPS Freight, food/beverage): Physical work but premium pay. $55,000 to $85,000.
- Waste management: City garbage and recycling routes. Stable, union-protected, benefits. $50,000 to $75,000.
- City bus driver: Requires P endorsement. Pension, healthcare, predictable schedule. $40,000 to $65,000.
- School bus driver: Requires P and S endorsements. Part-time hours with full benefits in many districts. $25,000 to $45,000.
- Fuel delivery: Requires H or X endorsement. Highest-paying Class B niche. $65,000 to $100,000.
The key advantage of Class B over Class A is lifestyle. You sleep at home. You do not spend weeks away from your family. The pay ceiling is lower than elite Class A positions, but the work-life balance is dramatically better.
Conclusion
The class b cdl license practice test is your fastest path to a home-daily career in trucking. Focus on General Knowledge and Air Brakes - skip Combination Vehicles entirely. Memorize the PSI values for the air brake system. Know the weight rules (26,001 lbs single vehicle, 10,000 lbs max trailer). Practice the snubbing method for downgrades. Those four topics cover 80% of the exam.
For more preparation, try our Free CDL Practice Test for additional General Knowledge and Air Brakes questions. If you are still deciding between CDL classes, check our Class A vs Class B CDL comparison guide.
Frequently Asked Questions (FAQ)
What tests are required for a Class B CDL?
You must pass the General Knowledge test (50 questions) and the Air Brakes test (25 questions). You do NOT need the Combination Vehicles test. Some states add a state-specific rules exam (like Texas Section 14). The class b cdl license practice test above covers both required exams.
What is the weight limit for a Class B CDL?
A Class B covers any single vehicle with a GVWR of 26,001 lbs or more. You can tow a trailer up to 10,000 lbs GVWR. If the trailer exceeds 10,000 lbs, you need a Class A CDL. This 10,000 lb threshold is the most-tested weight question on the exam.
What jobs can I get with a Class B CDL?
Class B jobs include dump truck, ready-mix concrete, straight truck delivery (food, beverage, freight), waste management, city bus (with P endorsement), school bus (with P and S endorsements), and fuel delivery (with H or X endorsement). Most are home-daily positions.
Is the Class B CDL test easier than Class A?
Yes. You skip the Combination Vehicles exam entirely, so there are no questions about fifth wheels, kingpins, coupling procedures, or trailer jackknife. You only study General Knowledge and Air Brakes.
Can I take the Class B CDL test online?
No. The knowledge tests must be taken in person at a DMV or licensing office. You can study online with practice tests and ELDT theory courses, but the exam itself is on a computer kiosk at the DMV.
How much does a Class B CDL cost?
DMV fees range from $50 to $120 depending on your state. Training costs vary: private schools charge $2,000 to $5,000, community colleges charge $1,500 to $3,000, and company-sponsored programs cover tuition if you commit to working for them for 6 to 12 months.