New Hampshire (NH) CDL manual 2026

Practice the manual, chapter by chapter

State manuals are built on the same national model, chapter for chapter. One thing to know from each chapter, then real questions from it to answer — tap an option to check yourself.

1. 1

   Introduction

   Everyone

   You will lose your CDL for at least 90 days if you have committed your first violation of an out-of-service order.

   How long do you lose your CDL for three or more serious traffic violations in three years?

   1. AAt least 90 days
   2. BAt least three years
   3. CAt least 60 days
   4. DAt least 120 days

   How long do you lose your CDL for two serious traffic violations in a three-year period?

   1. AAt least 30 days
   2. BAt least 60 days
   3. CAt least 120 days
   4. DAt least one year
   This chapter has 26 more questions. Practice them in the app and see your pass chance.
2. 2

   Driving Safely

   Everyone

   Because these devices can be noisy, be sure you know where their use is permitted.

   Which wheel components does the manual say are dangerous when missing?

   1. AHub caps and trim rings
   2. BBalance weights and stems
   3. CValve caps and dust shields
   4. DClamps, spacers, studs, or lugs

   You cannot avoid driving through a stretch of dense fog. Which headlight setting should you use?

   1. ALow beams, so light is not reflected back into your eyes
   2. BHigh beams, so the light reaches farther into the fog
   3. CParking lights, to reduce the glare for other drivers
   4. DFour-way flashers only, with the headlights switched off
   This chapter has 290 more questions. Practice them in the app and see your pass chance.
3. 3

   Transporting Cargo Safely

   Everyone

   Placards are diamond-shaped hazard warning signs placed on vehicles to identify the hazard class of the cargo being transported.

   Which cargo responsibility remains yours even when someone else loads the vehicle?

   1. ADetermining the freight class for billing
   2. BRecognizing overloads and poorly balanced weight
   3. CChoosing the route the shipment will take
   4. DSelecting the packaging the freight travels in

   When is a high center of gravity most dangerous?

   1. AOn long straight stretches at highway speed
   2. BDuring hard braking from low speed
   3. CWhile backing into a loading dock
   4. DIn curves, or when swerving to avoid a hazard
   This chapter has 26 more questions. Practice them in the app and see your pass chance.
4. 4

   Transporting Passengers

   P endorsement (bus)

   The after-trip inspection includes walking through the bus to find damage such as broken seats or handholds and any items riders left behind.

   Which sections of the manual does the knowledge test for the passenger endorsement cover?

   1. ASections 3 and 4
   2. BSections 2 and 4
   3. CSection 4 alone
   4. DSections 1 and 4

   During your pre-trip inspection of a bus interior, which of these items must be in safe working condition before you drive?

   1. AOnboard entertainment screens and charging ports
   2. BHandholds, railings, and rider signaling devices
   3. CPassenger reading lamps and window shades
   4. DAir conditioning vents at every seat row
   This chapter has 98 more questions. Practice them in the app and see your pass chance.
5. 5

   Air Brakes

   Any vehicle with air brakes

   Slack adjuster free play of more than about one inch where the push rod attaches requires adjustment.

   How is a manually operated air tank drain valve worked?

   1. ABy holding the dash drain switch until air stops
   2. BBy loosening the tank's inspection plate
   3. CBy backing off the fitting with a wrench
   4. DBy turning it a quarter turn or pulling a cable

   Besides a red warning light, what device do many air-braked vehicles use to alert the driver to low air pressure?

   1. AA flashing of the exterior headlights
   2. BAn automatic downshift of the transmission
   3. CA vibration built into the brake pedal
   4. DA buzzer that sounds in the cab
   This chapter has 148 more questions. Practice them in the app and see your pass chance.
6. 6

   Combination Vehicles

   Class A

   Service line blue; emergency line red.

   While listening to the trailer brakes during coupling, what should you hear?

   1. AAir escaping continuously from both glad hand seals
   2. BA steady hiss that slowly fades as the tanks fill up
   3. CThe brakes move on application, air escapes on release
   4. DThe relay valve clicking once and then staying silent

   What happens when you push in the trailer air supply knob before starting a trip?

   1. AThe service line vents and the trailer brakes apply
   2. BAir flows to the trailer and the trailer emergency brakes release
   3. CThe spring brakes on the tractor apply immediately
   4. DThe tractor parking brakes set and hold the drive axles
   This chapter has 118 more questions. Practice them in the app and see your pass chance.
7. 7

   Doubles and Triples

   T endorsement

   Charge the air system to normal pressure before checking air flow to the rear trailers.

   Before backing the converter dolly under the second trailer, the trailer's nose height should be:

   1. AExactly level with the top of the dolly fifth wheel
   2. BResting on its landing gear pads at ground level
   3. CWell above the fifth wheel so it drops on hard
   4. DSlightly lower than the center of the dolly fifth wheel

   Among common commercial combinations, which is generally the most likely to whip and roll its rearmost trailer during a sudden maneuver?

   1. AA set of triples
   2. BA tractor pulling a single 28-foot trailer
   3. CA tractor with one 53-foot semitrailer
   4. DA tractor pulling a set of doubles
   This chapter has 98 more questions. Practice them in the app and see your pass chance.
8. 8

   Tank Vehicles

   N endorsement

   Smooth, gradual acceleration, braking, and steering are the primary defense against liquid surge.

   Compared with most other kinds of cargo, why does a load of liquid in a tank make a truck easier to roll over?

   1. ALiquid cargo gradually lowers the air pressure in the tires
   2. BMuch of the load's weight is carried high above the roadway
   3. CLiquid loads are always heavier than dry freight loads
   4. DTank trailers ride on narrower axles than flatbed trailers

   During a pre-trip inspection of a cargo tank, what is the most important thing to check the tank body, piping, and valves for?

   1. AFresh paint covering all of the placard holders
   2. BDecals that display the carrier's safety rating
   3. CLeaks or any sign of product escaping from the tank
   4. DThe date the tank shell was originally manufactured
   This chapter has 62 more questions. Practice them in the app and see your pass chance.
9. 9

   Hazardous Materials

   H endorsement

   While driving, shipping papers must be in a pouch on the driver's door or in clear view within immediate reach while the seat belt is fastened.

   Which classes may not be carried as overhang or tailgate loads?

   1. AClasses 1, 4, and 5
   2. BClasses 2.2, 6.2, and ORM-D
   3. CClasses 2, 3, and 6
   4. DClasses 7, 8, and 9

   Within what period must carriers make detailed written reports of a hazardous materials incident?

   1. AWithin 90 days
   2. BWithin 5 days
   3. CWithin 30 days
   4. DWithin 10 days
   This chapter has 234 more questions. Practice them in the app and see your pass chance.
10. 10

    School Buses

    S endorsement

    Position the convex mirrors to see the entire side of the bus up to the mirror mounts, the front of the rear tires touching the ground, and at least one traffic lane on either side of the bus.

    Compared with flat mirrors, what is the main advantage of the convex mirrors mounted on the sides of a school bus?

    1. AThey give a much wider view along the side of the bus than flat mirrors do
    2. BThey show objects at their true size and their actual distance
    3. CThey reveal the area hidden directly behind the rear bumper
    4. DThey remove any need to check the flat mirrors before moving

    When should you adjust the outside mirror system on your school bus?

    1. AWhile driving slowly during the first mile of the route
    2. BBefore starting the route, while the bus is safely parked
    3. COnly after a student reports something you failed to see
    4. DAt the first student stop, while the red lights are flashing
    This chapter has 98 more questions. Practice them in the app and see your pass chance.
11. 11

    Pre-Trip Vehicle Inspection

    Everyone (skills test)

    Damaged air bags or shocks can affect vehicle handling and stopping distances.

    What is the stated function of the lug nuts?

    1. ATo retain the brake drum on the hub
    2. BTo center the tire on the rim
    3. CTo seal the hub against water entry
    4. DTo hold the wheel on the axle

    With the engine in what state are the critical fluid levels inspected?

    1. AEngine at fast idle
    2. BEngine off
    3. CEngine warmed and then shut down
    4. DEngine at normal idle
    This chapter has 200 more questions. Practice them in the app and see your pass chance.

The official New Hampshire CDL manual