CDL Tanker Vehicle Endorsement

First published: September 2, 2026Last verified: September 2, 2026Reviewed by the CertQuestUSA team

TL;DR

CDL Tanker Vehicle Endorsement: a 102-question practice bank for the real CDL Permit & Endorsement Exams standard, 2 full papers of 40 questions each with no repeats, every question citing the real regulation it comes from.

Where these questions come from

Every question in this bank cites a real source -- primarily FMCSA CDL Manual (77%) and 49 CFR (23%) of this exam's citations.

Not sure where you stand? Take the free diagnostic — 10 real questions across the exam's domains, no sign-up required, with a domain-by-domain breakdown at the end.

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2

full papers, no repeats

40

questions per paper

102

questions in the bank

What this exam covers

Baffled, Bulkhead, and Smooth Bore Tank Design12%
Braking, Surge Control, and Stopping Distance10%
Curves, Grades, and Road Conditions9%
DOT Specification Tanks, Retest, and Marking5%
Emergency Systems and Special Equipment9%
Endorsement Scope, Definitions, and Testing6%
High Center of Gravity and Rollover Risk11%
Inspecting Tank Vehicles13%
Liquid Surge and Movement13%
Outage and Safe Loading12%

5 real sample questions

What causes liquid surge in a partially filled cargo tank?

A. Movement of the liquid inside the tank as the vehicle speeds up, slows down, or turns

B. Air trapped in the vapor recovery line

C. The pressure relief valve cycling open and closed

D. Uneven tire pressure between the drive axles

Source: FMCSA CDL Manual §8.2.2

A tanker is coming to a stop on an icy road. What can happen when the surging liquid wave reaches the front of the tank?

A. The wave can push the stopped truck forward, potentially into an intersection

B. The tank will automatically vent to relieve pressure

C. The brakes will lock regardless of driver input

D. The outage space will fill completely, sealing the tank

Source: FMCSA CDL Manual §8.2.2

Besides retest and marking requirements, 49 CFR 383.119(a) also requires the tank endorsement test to cover "operating practices and procedures" described how?

A. Not otherwise specified elsewhere in the listed test content areas

B. Only those published by the vehicle manufacturer

C. Only those specific to a single named carrier

D. Operating practices are excluded entirely from the tank endorsement test

Source: 49 CFR 383.119(a)

Why does 49 CFR 180.405 matter to a driver hauling hazardous liquids, even though the driver is not the one certifying the tank’s specification?

A. The driver is operating equipment that must already conform to an authorized DOT/MC specification, and the driver’s pre-trip inspection should catch obvious non-conformance signs like damage or missing markings

B. It does not matter to drivers at all since it only governs manufacturers

C. It only applies to tank vehicles operated outside the United States

D. It replaces the driver’s pre-trip inspection duty entirely

Source: 49 CFR 180.405

What is the function of baffles inside a liquid cargo tank?

A. Bulkheads with holes that let liquid flow through while helping control forward-and-backward surge

B. Solid dividers that completely separate the tank into sealed compartments

C. External braces that reinforce the tank shell against rollover

D. Filters that remove sediment from the liquid before unloading

Source: FMCSA CDL Manual §8.2.4

Real-world data for this exam

Heavy and Tractor-Trailer Truck Drivers: real median wageMay 2025$58,640/yr Part of the real CDL Driver career pathExplore ›

Frequently asked questions

How many questions are on the CertQuestUSA CDL Tanker Vehicle Endorsement practice test?

102 questions total, split into 2 full papers of 40 each with no repeats across papers.

What topics does the CDL Tanker Vehicle Endorsement test cover?

10 domains, with the heaviest weight on Inspecting Tank Vehicles (13%), Liquid Surge and Movement (13%), and Baffled, Bulkhead, and Smooth Bore Tank Design (12%).

Where do CertQuestUSA's CDL Tanker Vehicle Endorsement questions come from?

Primarily FMCSA CDL Manual (77%) and 49 CFR (23%) of this bank's citations -- computed directly from this exam's own question sources, not a generic description.

Is there a free diagnostic for CDL Tanker Vehicle Endorsement?

Yes -- 10 real questions across the exam's domains, no sign-up required, with a domain-by-domain breakdown at the end.

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