New York CDL Combination Test (NY) 2026

4.7 out of 5 (194 votes)
80% Passing score
20 Questions
4 Mistakes allowed
If you're looking to earn your Commercial Driver's License (CDL) combination vehicles endorsement in NY, our NY CDL combination practice test is an invaluable resource. This test is designed to help you master the essentials needed for safely operating combination vehicles, which include both tractors and trailers. Unlike dubious 'DMV test cheat sheets' that promise shortcuts, our practice permit test is a reliable and legal method to ensure you're genuinely prepared for the real test. Our comprehensive practice test features a broad range of multiple-choice questions covering crucial topics such as coupling and uncoupling, pre-trip inspections, driving techniques, backing and maneuvering, and air brake systems. Each combination vehicle test consists of 20 questions, and you need to answer at least 16 correctly to pass. By engaging with our extensive question pool, you'll deepen your understanding of the specific challenges posed by combination vehicles, such as the increased stopping distances required due to their greater weight. One of the significant advantages of our New York CDL combination test is the end-of-test summary feature. After completing the test, you'll receive a detailed summary highlighting the questions you answered incorrectly along with the correct answers. This feedback is instrumental in pinpointing areas where you need further study, ensuring you can focus your efforts effectively. Our NY DMV practice test is more than just a study tool; it's your gateway to becoming a proficient and confident driver of combination vehicles. We understand that passing the DMV written test requires more than rote memorization; it demands a thorough understanding of the material, which our NY CDL combination practice test is designed to provide. With our combination CDL test, you'll build a solid foundation of knowledge, helping you to handle the unique demands of these larger, heavier vehicles safely and efficiently. Choose our combination CDL practice test for a thorough, legitimate, and proven method to prepare for your CDL combination vehicles endorsement in New York.
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Sample New York Combination Test Questions

Question 1

During a coupling-system inspection, what should you verify about the trailer air lines?

  1. A They have enough slack for turns
  2. B They are stretched with no slack
  3. C They support the landing-gear handle
  4. D They are disconnected from the glad hands

Correct answer: A – They have enough slack for turns

New York’s CDL manual directs drivers to verify that the air lines are properly connected to the glad hands, secured, undamaged, and free of leaks. They must also have enough slack to accommodate turns. The electrical cord should be firmly plugged in and secured rather than left disconnected.

Source: New York State Commercial Driver’s Manual CDL-10 — § 6.5.1, “Additional Things to Check During a Walk-around Inspection”

Question 2

Properly balancing cargo helps maintain safe traction and vehicle handling.

  1. A True
  2. B False

Correct answer: A – True

Poor weight balance can make a commercial vehicle unsafe to handle. Too little weight on the drive axles can reduce traction, while excessive or improperly positioned weight can interfere with steering or increase rollover risk. The driver must verify before the trip that the cargo is balanced and properly secured.

Source: New York State Commercial Driver’s Manual CDL-10 — §§ 3.1 and 3.2.4, “Inspecting Cargo” and “Balance the Weight”

Question 3

What are the two functions of a trailer’s emergency air line?

  1. A Cooling the trailer brakes and improving fuel economy
  2. B Operating the service brakes and reducing tire wear
  3. C Supplying the trailer air tanks and controlling the emergency brakes
  4. D Raising the landing gear and securing the fifth wheel

Correct answer: C – Supplying the trailer air tanks and controlling the emergency brakes

The emergency or supply line carries air from the tractor to fill the trailer air tanks. It also controls the trailer emergency brakes. If pressure is lost from this line, the trailer emergency brakes apply and the tractor protection valve closes.

Source: New York State Commercial Driver’s Manual CDL-10 — § 6.2.4, “Trailer Air Lines—Emergency Air Line”

Question 4

Which valve allows trailer brakes to apply more quickly after service-line pressure changes?

  1. A Quick-release valve
  2. B Relay valve
  3. C Front-wheel limiting valve
  4. D Tractor protection valve

Correct answer: B – Relay valve

The trailer service line is connected to relay valves. When service-line pressure changes, the relay valves send air from the trailer tanks to the brakes, allowing them to apply more quickly. The tractor protection valve instead protects the tractor’s air supply if the trailer breaks away or develops a major leak.

Source: New York State Commercial Driver’s Manual CDL-10 — § 6.2.4, “Trailer Air Lines—Service Air Line”

Question 5

During a fifth-wheel inspection, where must the locking jaws be positioned on the kingpin?

  1. A Around the head
  2. B Around any polished surface
  3. C Around the shank
  4. D Around the base

Correct answer: C – Around the shank

After coupling, look into the back of the fifth wheel and verify that the locking jaws have closed around the kingpin’s shank. Also check that the locking lever is in the locked position and its safety latch is engaged. Do not drive the coupled unit if the connection is incorrect.

Source: New York State Commercial Driver’s Manual CDL-10 — § 6.4.1, “Coupling Tractor-Semitrailers—Step 13: Inspect Coupling”

Question 6

If the trailer wheels lock and the trailer begins to skid during braking, what should you do?

  1. A Accelerate until the wheels begin turning
  2. B Turn sharply away from the skid
  3. C Apply the trailer hand valve harder
  4. D Release the brakes to regain traction

Correct answer: D – Release the brakes to regain traction

Locked trailer wheels can lose traction and allow the trailer to swing toward a jackknife. Stop using the brakes and release them so the wheels can regain traction. Do not use the trailer hand valve to straighten the rig because braking the trailer wheels caused the skid in the first place.

Source: New York State Commercial Driver’s Manual CDL-10 — § 6.1.5, “Prevent Trailer Skids”

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