1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
All tests
/
 
 
 
 
 
Advertisement
Based on official Hawaii exam questions

Free HI CDL Tanker Vehicles Practice Test 2025

  • Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements.

Whether driving along the iconic coastal highways of Oahu, passing the lush rainforests and towering cliffs of Maui, or cruising down the volcanic roads on the Big Island, drivers must carefully navigate the narrow, winding roads that are so common in most of this state. With that being said, driving a tanker truck in the Aloha State might be more difficult than you thought, requiring extra caution to maintain stability. We know you’ve got what it takes to become a successful commercial driver, but you must prove yourself to the Hawaii Department of Transportation (HDOT).

Before you can get behind the wheel of an actual tanker, you must obtain a Tank Vehicles (N) Endorsement on your Commercial Driver’s License (CDL). This endorsement allows you to drive vehicles transporting liquids or gases in tanks whose individual capacity is larger than 119 gallons and whose aggregate capacity is at least 1,000 gallons. To transport hazardous liquids and gases such as gasoline and pesticides, you must also obtain a HazMat (H) Endorsement.

It might be difficult to estimate your probability of passing the Tank Vehicles knowledge test on your own. Even when you’re doing a great job memorizing the important aspects of becoming a successful tanker driver, there’s no way to predict the precise questions you’ll get on the official exam. To help you get an idea about your current position in your learning journey, we have created a series of CDL Tank Vehicles Endorsement practice tests specific to the state of Hawaii.

Consisting of 20 questions based on the official 2025 CDL manual (Hawaii CDL Handbook 2025), each practice test closely resembles the official Tank Vehicles knowledge exam. With unlimited attempts, students can train on these practice tests every day. Your chances of passing this exam will gradually increase if you remain consistent in your training. However, it is crucial to remember that your final goal is to become a skilled tanker driver, not to obtain a passing score.

Passing the Tank Vehicles knowledge exam represents one step in your commercial driving career. It is followed by employment, where countless hours of driving will help you further refine your skills. As you cruise down the Hana Highway in a full tanker, you’ll be grateful for the time and effort spent training and learning prior to obtaining the ”N” endorsement.

6 min to complete
Available in EN and ES
HI commercial driver's license
Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives

Authored and curated by Steven Litvintchouk, M.S.

Chief Educational Researcher (ACES member)
Methodology & Editorial Policy
Last verified for accuracy: October 2025 (reviewed weekly)

What to expect on the actual HI permit test

20

questions

16

correct answers to pass

80%

passing score

We know what it takes to pass. And we’ve got the proof.

Driver’s Ed is - nobody wants to set foot inside the DMV. That’s why millions of learners trust us for simple, visual, effective prep.

An Official & Trusted Partner in Driver Education

We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.

A Smarter Way to Study

Challenge Bank™

Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.

AI-Powered Feedback

Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.

Interactive Handbook

Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.

4/5
3 votes
Click a star to add your vote
Ask AI Coach
Hi there! I'm Officer Frank