Massachusetts CDL Practice Test

50 questions with one hour to finish. Air Brakes has 25 questions (25 minutes), Hazardous Materials 30 (30 minutes), and Passenger, Combination, Tanker and Doubles/Triples 20 each (20 minutes). Massachusetts Commercial Driver’s License Manual p. i

The Massachusetts CDL Manual (AAMVA, March 2025): Massachusetts’s CDL rules, then inspection, safe driving, cargo, passengers, air brakes, combination vehicles, doubles and triples, tankers, hazardous materials and school buses.

Class A: General Knowledge and Combination written tests and a road test. Class B and Class C: General Knowledge and a road test, though moving up from Class D to Class C skips the road test unless an endorsement needs one. Passenger, School Bus and Air Brakes add a written and a road test; Hazmat, Tank and Doubles/Triples are written only.

Yes. Besides English, the RMV offers the CLP general knowledge exam and every endorsement exam in Spanish and Portuguese, so each written test can be taken in whichever of the three languages you read best.

General Knowledge takes 40 right out of 50, Air Brakes 20 of 25 and Hazardous Materials 24 of 30. Tank, Passenger, Doubles/Triples, Combination Vehicles and School Bus each take 16 right out of 20. Why 80% in every state →

Be 18 for intrastate (21 for interstate), hold a Massachusetts Class D license valid for the whole permit, prove lawful presence and residency, meet the medical standards and pass the general knowledge test (plus combination for Class A). First-time Class A/B and P/S/H applicants also need entry-level training.

180 days, renewable once for another 180. After that you apply for a new CLP and retake the knowledge tests. You can schedule the road test 14 days after the CLP is first issued. Massachusetts Commercial Driver’s License Manual p. iv

A valid CLP with the right endorsements, a DOT medical card, a road test application and a sponsor 21 or older with a CDL for that vehicle. The vehicle must match the class, be free of hazmat, registered and inspected, with a seat for the examiner. The test has a pre-trip inspection, off-street maneuvers and an on-road drive. Massachusetts Commercial Driver’s License Manual p. vi to vii

Yes. The written and road tests may be waived if your record for the past two years is clean and you drive a similar CMV for work. Expired CDLs can’t be converted, and a hazmat endorsement never transfers: you reapply for it. Massachusetts Commercial Driver’s License Manual p. x

Massachusetts Registry of Motor Vehicles (RMV) lists the current fees for the commercial learner permit, the CDL tests and the license on its official fee page.

No more than six CDL skills tests in any 12-month period. The State Police give Massachusetts commercial road tests. Your sponsor must be at least 21, hold a CDL with the right endorsements for your vehicle, have held a CDL for at least a year and carry a DOT medical card if one is required.

Within 30 days of its expiration date. Miss that window and you must pass the knowledge tests again before getting a permit. While practicing, drive only the class of vehicle your permit covers, with a licensed driver holding the right class and endorsements, and keep the permit with you.

Pass the general knowledge exam plus either the hazardous materials (H) or the passenger (P) endorsement exam. In Massachusetts a Class C CDL must always carry a passenger, hazmat or air brakes endorsement.

A CDL with Passenger and School Bus endorsements, plus a school bus certificate issued by the state Department of Public Utilities; that needs three years of driving experience, CORI and SORI checks, a DOT physical and a DPU road test. Massachusetts Commercial Driver’s License Manual p. ix

Pass the hazmat knowledge test (results are good for two years) and a TSA background check (about 30 days). No CLP is issued with hazmat, and the RMV suggests getting your CDL first. Massachusetts Commercial Driver’s License Manual p. xi

Possibly. Under the Lifetime Disqualification Waiver Program, drivers who have served at least 10 years with a clean record may apply, except those disqualified in another state or for drug- or human-trafficking felonies. Massachusetts Commercial Driver’s License Manual p. xx

Massachusetts treats air brakes as an A endorsement that is never printed: you have it whenever your license carries no L restriction. Removing an L takes a written exam and a road test. The Doubles/Triples (T) endorsement is offered only on a Class A license, though Class A doesn't require it.

K means intrastate operation only: you may drive commercially inside Massachusetts but not across state lines. You can apply for a CDL from 18, but everyone under 21 is issued the K restriction, because federal rules set 21 as the minimum age for interstate commercial driving.

Often yes. Massachusetts requires a valid DOT medical certificate for drivers of commercial vehicles over 10,000 pounds, and for anyone carrying 15 or more passengers or placarded hazardous materials in a vehicle of any size. The only exception is state or municipal employees driving a state or municipal vehicle.

Possibly, within Massachusetts only. The RMV issues intrastate medical waivers for vision, diabetes, heart conditions, loss of a limb and hearing loss when the condition won't affect safe driving. You apply with a recent DOT exam showing you qualify only with a waiver and a letter from your employer, and your license gets a W restriction.

Vision: a combined side-to-side field of at least 120 degrees, 20/40 or better in either eye, and telling red, green and amber apart. Hearing: your provider must say it won't affect safety, but you must hear air leaks and the compressor, so a profoundly deaf driver is limited to vehicles without air brakes.

At midnight on the second day after it expires, when the RMV marks you not certified; reminder letters go out 60 and 30 days before. If an examiner reports you unqualified, or voids the certificate, the downgrade is immediate.

Get a new medical certification to the RMV within one year of the downgrade letter and the CDL comes back with no retesting. After a year you're left with a regular Class D license. A learner permit still within its term is restored at a Service Center.

Not if you're qualified for interstate driving: the RMV takes that only electronically from the National Registry. If you're qualified for driving inside Massachusetts only, a paper certificate is accepted when the Registry doesn't have it. If you're qualified only in-state but self-certified as interstate, change your category within 10 days of the RMV's notice to avoid a downgrade.

Renew an existing REAL ID CDL online; upgrading to REAL ID or a limited-term license means a Service Center visit, with the application and the CDL self-certification form. The new card arrives by mail in 10 to 14 days. Every endorsement renews except Hazmat, which needs a fresh TSA check (it can take over 60 days) and the hazmat test.

No. CDL disqualifications are required by law, the RMV has no say in them, and a disqualified driver can't apply for a hardship license. A hearing is possible only to challenge the record itself, with proof you were found not guilty or not responsible.

Not slowing to check for a train, not stopping when the tracks aren't clear, starting across without room to clear the tracks, ignoring a signal or officer, or getting stuck because the truck sits too low. A first conviction costs 60 days, a second 120, and a third a year.

Yes. Commercial drivers can be disqualified for offenses in any vehicle: drunk or drugged driving, refusing an alcohol test or leaving a crash scene in your own car each cost the CDL for at least a year, and a second such offense for life.

Yes. Once your commercial privileges have been disqualified, or your CDL expired, for over a year, Massachusetts makes you pass the full commercial knowledge and skills tests again before it reinstates the CDL or issues a new one.

Yes. Unpaid parking tickets, motor vehicle excise taxes or E-ZPass violations can block your renewal, and you must pay them first. For tickets or excise taxes, bring a receipt from the city or town showing they're paid. You can check your license status beforehand to see if anything is outstanding.