Free New Hampshire CDL Tanker Endorsement Test Practice Test

Sample CDL Tanker Endorsement practice questions

Try a few representative questions below. Each includes the correct answer and a short explanation — the same style you'll see in the full practice test.

1. Question 1Liquid Surge and Baffles

   A tanker truck carrying 6,000 gallons of liquid is equipped with a single, full baffle. During sudden deceleration, what is the primary hazard associated with the liquid's movement and the baffle's effectiveness?

   • A.The liquid will surge forward, exerting a force primarily on the front of the tank and potentially overwhelming the baffle's ability to stabilize.(Correct)
   • B.The baffle will cause the liquid to rotate, leading to an unstable center of gravity.
   • C.The baffle will absorb all kinetic energy, preventing any significant sloshing.
   • D.The liquid will remain relatively still due to the baffle's presence, posing no increased risk.

   Explanation

   A single baffle, especially in a full tank, can reduce but not eliminate surge. During sudden deceleration, the liquid's inertia causes it to continue moving forward, exerting significant force on the front of the tank and the baffle. This surge can still lead to instability, loss of control, or even tank damage if the baffle cannot fully dissipate the energy.

2. Question 2Liquid Surge and Specific Gravity

   You are hauling a load of corrosive liquid with a specific gravity of 1.5. If the tank is filled to 80% capacity, how does the surge effect compare to hauling water (specific gravity 1.0) under identical conditions?

   • A.The surge effect will be 1.2 times greater, calculated as 1.5 * 0.8.
   • B.The surge effect will be 0.5 times greater, as 80% fill reduces the effective specific gravity.
   • C.The surge effect will be 1.5 times greater due to the higher specific gravity.(Correct)
   • D.The surge effect will be the same, as specific gravity does not influence surge dynamics.

   Explanation

   The surge effect is directly proportional to the weight of the liquid. Specific gravity is a measure of density relative to water. A liquid with a specific gravity of 1.5 is 50% denser and heavier than water. Therefore, under identical conditions, the force exerted by the moving liquid during surge will be 1.5 times greater than that of water.

3. Question 3Tanker Compartmentalization

   When performing a 'split load' with a tanker truck, carrying two different types of chemicals that are incompatible, what is the MOST critical safety consideration regarding tank partition integrity?

   • A.Confirming that the partitions are leak-proof and designed to prevent any intermingling of the chemicals.(Correct)
   • B.Verifying that the partitions are rated for the combined vapor pressure of both chemicals.
   • C.Checking that the partitions are easily removable for cleaning between loads.
   • D.Ensuring the partitions are structurally sound to withstand normal driving forces.

   Explanation

   When hauling incompatible chemicals, preventing any contact between them is paramount. The partitions must be absolutely leak-proof to avoid hazardous reactions, toxic fumes, or explosions that could result from mixing. While structural integrity and vapor pressure are important, leak-proof design is the primary safety feature for incompatible substances.

Want the full exam? Start the free practice test →

Frequently asked questions

Related practice tests

• CDL General
• CDL Air Brakes
• Alabama DMV
• Alaska DMV