New York CDL Manual: Study Guide by Section

How commercial licensing works in New York: license classes, which endorsements exist, how the knowledge and skills tests are structured, and what disqualifies a driver. It sets the map for everything that follows.

• Every knowledge test requires at least 80% to pass — a federal standard, identical in every state. (49 CFR 383.135(a)(1))
• You must hold your commercial learner permit at least 14 days before taking the road test. (49 CFR 383.25(e))

The core of the General Knowledge test: vehicle inspection routine, basic control, shifting, seeing hazards, communicating, space management, night and winter driving, and emergencies. More exam questions trace to this section than to any other.

• The general knowledge test is required of every CDL applicant before a learner permit can be issued. (49 CFR 383.71(a)(2))

Cargo inspection, weight and balance, securing loads, and covering rules. Tested inside General Knowledge — and again in real life at every roadside inspection.

Pre-trip rules specific to buses, loading and unloading passengers, emergency exits, and railroad crossings with passengers aboard. Required for every bus driver applicant.

• The passenger endorsement requires both a knowledge test and a skills test in a passenger vehicle. (49 CFR 383.93(c)(2))

How air brake systems build, hold and apply pressure; the full air-brake inspection sequence; and braking technique. Skip or fail this test and your license is restricted away from air-braked vehicles.

• Failing the air brake knowledge test (or testing in a vehicle without air brakes) puts an air-brake restriction on the license. (49 CFR 383.95(a))

Coupling and uncoupling tractor-trailers, inspecting the connection, and why combinations roll over and jackknife. New York maps this section to the combination test every Class A applicant takes.

• An applicant who fails the combination vehicles knowledge test must not be issued a Class A permit or CDL. (49 CFR 383.135(a)(3))

Pulling two or three trailers: coupling order, the crack-the-whip effect, and why doubles need more following distance than anything else on the road.

• The doubles/triples endorsement requires a knowledge test only — no skills test. (49 CFR 383.93(c)(1))

Surge, baffles, outage, and why a half-full tank is the hardest thing to stop. Required when hauling liquid or gas in tanks over the federal thresholds.

• A tank vehicle means individual tanks over 119 gallons and 1,000+ gallons aggregate, permanently or temporarily attached. (49 CFR 383.5)
• The tank endorsement is a knowledge test only. (49 CFR 383.93(c)(3))

Placarding, loading rules, what cannot ride together, and emergency response. The only endorsement that also requires a federal security screening before issuance.

• Hazmat applicants must pass a TSA security threat assessment in addition to the knowledge test. (49 CFR 383.71(a)(8), part 1572)
• X on a license = combined tank vehicle + hazmat endorsements. (49 CFR 383.153(a)(9)(v))

Danger zones around the bus, the loading/unloading procedure, and post-trip checks for sleeping children. S requires both a knowledge and a skills test.

• The school bus endorsement requires a knowledge test and a skills test. (49 CFR 383.93(c)(5))

What the examiner scores: the walk-around inspection you narrate, the backing maneuvers, and the road drive. You take the skills test in the class of vehicle you want licensed for.

• The skills test must be taken in a representative vehicle of the group the applicant wants licensed for. (49 CFR 383.91(b))