How many questions are on the CDL HazMat test?

The CDL HazMat endorsement knowledge test has 30 multiple-choice questions. You need to answer at least 24 correctly (80%) to pass.

How much does the HazMat endorsement cost?

The TSA background check fee is $85.25 as of 2025 ($41 if you have a valid TWIC card). State DMV fees for the endorsement vary, typically $10-$60 depending on your state.

How long is the HazMat endorsement valid?

The HazMat endorsement is valid for 5 years. Renewal requires a new TSA security threat assessment and fingerprinting.

What are the emergency phone numbers tested on the HazMat exam?

CHEMTREC: 1-800-424-9300 (chemical emergency info for responders). National Response Center: 1-800-424-8802 (federal reporting for oil and chemical spills). Both numbers are frequently tested.

What is the Table 1 vs Table 2 placard rule?

Table 1 materials (like explosives 1.1-1.3, poison gas 2.3, dangerous when wet 4.3) ALWAYS require placards regardless of quantity. Table 2 materials require placards when the aggregate gross weight is 1,001 lbs or more.

SYSTEM ONLINE — HAZMAT TRAINING MODULE ACTIVE

PASS YOUR CDL HAZMAT
ON THE FIRST TRY

Free practice tests, study games, visual placard training, and smart study tools. Built by a driver who got tired of garbage study sites.

235QUESTIONS

5STUDY GAMES

80%PASS THRESHOLD

30TEST ITEMS

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VISUAL STUDY

DOT HAZARD CLASSES & PLACARDS

Select any class for full intel. These account for a third of the test.

TRAINING MODES

SELECT OPERATION

Every question includes an explanation. Missed questions are tracked for targeted drilling.

STUDY GAMES

TRAIN YOUR BRAIN

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QUICK REFERENCE

KEY DATA FOR THE TEST

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THE NUMBERS

30 questions on test
24 correct to pass (80%)
9 DOT hazard classes
1,001 lbs Table 2 threshold
$85.25 TSA background check
5 years endorsement valid

EMERGENCY NUMBERS

1-800-424-8802 National Response Center
1-800-424-9300 CHEMTREC
911 Local emergency
DOT Form 5800.1 written report within 30 days

SHIPPING PAPERS

Include: name, class, ID number, packing group
Driving: reach or door pocket
Outside: seat or door pocket
Shipper prepares // carrier verifies
HazMat entries: first, highlighted, or X

PLACARD RULES

Table 1: Always — Exp 1.1-1.3, Poison Gas, DWW, Rad III
Table 2: At 1,001+ lbs
All 4 sides of vehicle
Readable from 50 feet
Min 10¾" per side

KEY DISTANCES

5 feet from road (explosives parking)
25 feet no smoking / tank loading distance
100 feet attendant from parked vehicle
300 feet from bridge/tunnel/dwelling/fire
10 B:C fire extinguisher minimum rating

LOADING RULES

No smoking within 25 feet
Parking brake before loading
Engine off unless pump needed
Oxidizers + flammables: separated
Poisons: never with food/feed
Cyanide + acids: never together

SECURITY PLANS

Personnel security
Unauthorized access prevention
En-route security
Driver carries copy
Report suspicious activity to TSA
Lock vehicle when unattended

TIRES & EQUIPMENT

Check tires: start + every stop
Pressure check: gauge only
Overheated tire: remove, safe distance
No flares near Class 3, 2.1, 1.1-1.3
Use reflective triangles instead
Flat tire: drive to nearest safe place only

PASS YOUR CDL HAZMATON THE FIRST TRY