How many questions are on the Missouri CDL knowledge test?

The Missouri CDL general knowledge test has 50 multiple-choice questions, and you need 80% (40 correct) to pass. The Passenger test is shorter. Most states do not publish its question count, but the 80% pass mark is federal under 49 CFR 383.135 and applies to every CDL knowledge test.

What's the minimum age for a CDL in Missouri?

In Missouri, the minimum age for a CDL is 18 (intrastate); 21 (interstate). Federal law requires drivers to be 21+ to drive a CMV across state lines or to transport hazardous materials, regardless of state minimum age.

Does the Passenger endorsement let me drive a school bus?

No. School bus needs the S endorsement on top of P, and federal rules require you to hold Passenger as well rather than instead. The extra material is real: danger zones around the bus, loading and unloading procedure, and the post-trip check for sleeping children.

At what passenger count do I need a P endorsement?

A Passenger endorsement is required to operate a commercial motor vehicle designed to transport 16 or more passengers, including the driver. If the vehicle is designed for 15 or fewer (including the driver), you may not need a CDL with a P endorsement, though state rules vary. The key factor is the vehicle's design capacity, not the actual number of passengers on board.

What is the standee line and why does it matter?

The standee line is a line on the floor of a bus behind which standing passengers must remain. No passenger may stand in front of the standee line or forward of the rear of the driver's seat. This rule exists to prevent passengers from blocking the driver's view and to keep them in a safer area of the bus during movement.

Do I need a P endorsement for a church van or shuttle?

It depends on the vehicle's passenger capacity. If the van or shuttle is designed to carry 16 or more people including the driver, you need a CDL with a P endorsement. Many 15-passenger vans fall just under this threshold. However, some states have additional requirements for passenger transport even below the CDL threshold.

What kind of pre-trip inspection is required for passenger vehicles?

In addition to the standard CDL pre-trip inspection, passenger vehicles require checks on all emergency exits and windows, handrails and floor coverings, seats and seat frames, the standee line, signage, wheelchair lifts or ramps if applicable, and the fire extinguisher. The driver must verify all safety equipment is present and functional before each trip.

Can I drive a school bus with just a P endorsement?

No. Driving a school bus requires both a Passenger (P) endorsement and a School Bus (S) endorsement. The P endorsement alone qualifies you to drive commercial passenger vehicles like transit buses, motor coaches, and shuttles, but not school buses carrying students.

Missouri CDL passenger practice test

Updated for 2026 · 43 passenger questions of 483 across the full MO CDL path · Aligned to the commercial driver manual · Part of the MO CDL path

Start with general knowledge first. We recommend completing it before drilling passenger questions.

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Required to carry 16 or more people, counting yourself. Covers loading, the standee line and the stops buses must make at railroad crossings.

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About the Missouri Passenger test

A separate written exam at the federal 80% pass mark, required to carry 16 or more people including yourself. Most states do not publish a question count for it. Questions cover passenger safety, pre-trip inspection of passenger vehicles, loading and unloading passengers, emergency exit and evacuation procedures, handling of unruly passengers, prohibited practices, post-trip inspection requirements, and rules for driving in various conditions with passengers aboard. You will also need to demonstrate knowledge of ADA accessibility requirements. This is a separate knowledge test from General Knowledge, required in every state under 49 CFR 383.71, and the DOR publishes the Missouri Commercial Driver License Manual as the study source for it.