New Hampshire CDL Combination Test (NH) 2026

5 out of 5 (43 votes)
80% Passing score
20 Questions
4 Mistakes allowed
If you're getting ready to obtain your CDL combination vehicles endorsement in NH, you've come to the right place. Our New Hampshire DMV written test practice is designed to help you master all the critical knowledge needed for the road. While the DMV restricts the publication of actual test questions, this NH CDL combination practice test is meticulously crafted by professional driving instructors to closely mirror the real test experience. Our New Hampshire drivers test practice covers crucial areas like coupling and uncoupling, pre-trip inspections, driving techniques, backing and maneuvering, and air brake systems. With 20 multiple-choice questions, you'll need at least 16 correct answers to pass. We ensure that every question touches on essential topics, including the increased stopping distances required for combination vehicles due to their greater weight. Understanding the unique challenges of handling larger, heavier vehicles is vital for maintaining safety on the road. The combination vehicle test allows you to explore these concepts at your own pace, as there's no time limit to rush you through. Take as much time as you need to ensure you're confident in every area. The questions in this permit practice test are written and reviewed by experienced instructors who have guided thousands of drivers to successfully obtain their licenses. You can trust that the NH driving test practice provides an authentic and effective learning experience, enabling you to grasp the concepts necessary to ace your test. By preparing with our combination CDL test, you'll not only increase your chances of passing but also build a solid foundation of knowledge that will serve you well on the road. Begin your journey towards obtaining your CDL with our reliable and comprehensive New Hampshire CDL combination practice test and feel confident behind the wheel of a combination vehicle.
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Sample New Hampshire Combination Test Questions

Question 1

When is the trailer hand valve an acceptable parking control for a combination vehicle?

  1. A When parked on a grade
  2. B When stopped at a loading dock
  3. C When temperatures are below freezing
  4. D Never

Correct answer: D – Never

The trailer hand valve must not be used for parking. New Hampshire’s CDL manual explains that lost air pressure could release the brakes on a trailer without spring brakes. Use the vehicle’s parking brakes instead, and chock the wheels when parking a trailer that does not have spring brakes.

Source: New Hampshire Commercial Driver’s License Manual — § 6.2.1, “Trailer Hand Valve”

Question 2

Before connecting the tractor and trailer glad hands, which condition should you verify?

  1. A The couplers can be left dirty if the air pressure is normal
  2. B The couplers and rubber seals are clean and in serviceable condition
  3. C Damaged seals have been wrapped with tape
  4. D The trailer hand valve is holding the trailer in place

Correct answer: B – The couplers and rubber seals are clean and in serviceable condition

Glad hands connect the tractor’s service and emergency air lines to the trailer. Their rubber seals prevent air from escaping, so the couplers and seals must be cleaned and inspected before connection. During coupling, connect each line to the matching glad hand and support the lines where they will not be crushed or caught.

Source: New Hampshire Commercial Driver’s License Manual — § 6.2.5, “Hose Couplers (Glad Hands)”, New Hampshire Commercial Driver’s License Manual — § 6.4.1, “Coupling Tractor-Semitrailers”

Question 3

How should you negotiate a turn in a combination vehicle to reduce rollover risk?

  1. A Slow before the turn and steer smoothly through it
  2. B Accelerate while entering the turn
  3. C Use quick, sharp steering movements
  4. D Apply only the trailer hand valve

Correct answer: A – Slow before the turn and steer smoothly through it

New Hampshire’s CDL manual advises drivers to slow to a safe speed before entering a turn and to steer gently and smoothly. Turning too fast can roll a combination vehicle, while sudden steering may create a crack-the-whip effect that overturns the trailer. Avoid abrupt lane changes and sharp control movements.

Source: New Hampshire Commercial Driver’s License Manual — § 6.1.1, “Rollover Risks”, New Hampshire Commercial Driver’s License Manual — § 6.1.2, “Steer Gently”

Question 4

What is the function of the trailer air-supply control?

  1. A It is a yellow knob that applies only the tractor parking brakes
  2. B It mechanically secures the trailer to the tractor
  3. C It keeps tractor air from escaping without controlling trailer air
  4. D It supplies air to the trailer or shuts it off and applies the trailer emergency brakes

Correct answer: D – It supplies air to the trailer or shuts it off and applies the trailer emergency brakes

On newer vehicles, the trailer air-supply control is normally a red, eight-sided knob. Pushing it in supplies air to the trailer through the emergency or supply line. Pulling it out shuts off that air and applies the trailer emergency brakes by operating the tractor-protection valve.

Source: New Hampshire Commercial Driver’s License Manual — § 6.2.3, “Trailer Air Supply Control”

Question 5

What safety problem may result if the fifth-wheel plate is not lubricated as required?

  1. A The trailer electrical system may disconnect
  2. B The trailer brakes may remain released
  3. C Friction may cause steering problems
  4. D The landing gear may retract unexpectedly

Correct answer: C – Friction may cause steering problems

The fifth-wheel plate must be greased as required so the tractor and trailer can pivot without excessive friction. Inadequate lubrication can make steering difficult because the trailer resists turning at the coupling point. Inspect the fifth wheel for proper lubrication, damage, missing parts, and secure mounting before coupling.

Source: New Hampshire Commercial Driver’s License Manual — § 6.4.1, “Coupling Tractor-Semitrailers”

Question 6

In a crash, a fully loaded combination rig is about ten times more likely to roll over than an empty rig.

  1. A TRUE
  2. B FALSE

Correct answer: A – TRUE

The CDL manual states that fully loaded rigs are ten times more likely to roll over in a crash than empty rigs. Stacking cargo higher raises the vehicle’s center of gravity and makes it easier to overturn. Keep cargo low and centered, and reduce speed before corners, ramps, and other turns.

Source: New Hampshire Commercial Driver’s License Manual — § 6.1.1, “Rollover Risks”

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