25 realistic Tank Vehicles practice questions for Rhode Island CDL applicants. Required for: Vehicles with liquid or gaseous tanks ≥1,000 gallons. Official test: 20 questions, 16 correct to pass.
Question 1 of 25 · Tank Types
What's a "high-volume" tank?
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A.
A tank with capacity greater than typical
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B.
A tank with high pressure
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C.
A tank with multiple compartments
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D.
A tank with a smooth interior
Correct answer: A.
High-volume tanks carry more than typical loads and are subject to special rules.
Question 2 of 25 · Emergency Equipment
What equipment must be on a HazMat tank vehicle?
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A.
Emergency response equipment
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B.
Spill kits as required
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C.
Communication devices
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D.
All of the above
Correct answer: D.
Carry spill response gear, communication, and any other required equipment.
Question 3 of 25 · Vehicle Dynamics
When is liquid surge greatest?
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A.
When tanks are full
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B.
When tanks are partially full
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C.
When tanks are empty
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D.
When tanks are heated
Correct answer: B.
Surge is greatest when tanks are partially full and the liquid can move freely.
Question 4 of 25 · Vehicle Dynamics
Why must drivers be especially careful when starting and stopping a tanker?
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A.
Surge can cause loss of control
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B.
Engine torque is too high
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C.
Brakes are weaker
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D.
Steering is harder
Correct answer: A.
Surge during starts and stops can shove the vehicle and cause loss of control.
Question 5 of 25 · Adverse Conditions
What's the safe way to handle a tanker in heavy wind?
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A.
Slow down and grip steering firmly
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B.
Speed up to maintain control
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C.
Use the engine retarder
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D.
Lock the brakes
Correct answer: A.
High winds destabilize tankers; slow down and steer firmly.
Question 6 of 25 · Vehicle Dynamics
How can drivers prevent tanker rollover?
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A.
Reduce speed in curves and ramps
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B.
Avoid sudden steering
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C.
Maintain proper load and securement
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D.
All of the above
Correct answer: D.
Slow speed, smooth steering, and proper loading all help prevent rollovers.
Question 7 of 25 · Placards
Why are tankers required to have specific markings?
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A.
To identify the cargo and any hazards
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B.
To make them more visible
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C.
For tax purposes
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D.
For insurance only
Correct answer: A.
Markings identify cargo and any hazards for emergency responders and others.
Question 8 of 25 · Loading
What's the consequence of overloading a tank?
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A.
Increased wear on tires and brakes
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B.
Possible tank rupture
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C.
Illegal weight violations
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D.
All of the above
Correct answer: D.
Overloading causes wear, legal trouble, and danger of tank failure.
Question 9 of 25 · Inspection
Why must drivers check the discharge valve before driving?
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A.
To verify it is closed and not leaking
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B.
To allow ventilation
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C.
To start the engine
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D.
To engage the brakes
Correct answer: A.
Discharge valves must be closed and leak-free before driving.
Question 10 of 25 · HazMat Driving
Why is "no smoking" enforced near tankers?
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A.
Risk of fire and explosion from cargo vapors
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B.
Cleanliness
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C.
Tradition
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D.
OSHA rules only
Correct answer: A.
Vapors can ignite or explode; smoking is prohibited near tankers.
Question 11 of 25 · Emergency Maneuvers
What's the best approach to handling a flat tire on a tanker?
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A.
Pull over safely and replace the tire or call for help
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B.
Continue driving
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C.
Drive faster to make it to the next exit
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D.
Stop in the middle of the road
Correct answer: A.
Stop safely and address the flat — driving on it can lead to bigger problems.
Question 12 of 25 · Inspection
What's the importance of regular maintenance for tank vehicles?
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A.
Prevents leaks
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B.
Ensures safe operation
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C.
Identifies problems before failures
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D.
All of the above
Correct answer: D.
Routine maintenance prevents leaks, failures, and unsafe operation.
Question 13 of 25 · Loading
How can drivers tell if a tank is properly loaded?
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A.
Check that all compartments are filled within outage limits
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B.
Check the weight distribution
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C.
Confirm valves are closed
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D.
All of the above
Correct answer: D.
Verify outage, weight distribution, and closed valves before moving.
Question 14 of 25 · Vehicle Dynamics
What can drivers do to control surge?
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A.
Brake gradually well before stopping
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B.
Accelerate gradually
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C.
Allow extra following distance
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D.
All of the above
Correct answer: D.
Smooth braking and acceleration, plus extra space, all help control surge.
Question 15 of 25 · Vehicle Dynamics
Why are tank vehicles often top-heavy?
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A.
The cargo is dense
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B.
The cargo's liquid weight rises with the tank shape
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C.
They have raised cargo platforms
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D.
The center of gravity is high due to liquid load
Correct answer: D.
Tank vehicles tend to have a high center of gravity, making them prone to rollover.
Question 16 of 25 · Speed Management
When should tank drivers especially reduce speed?
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A.
On wet or slippery roads
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B.
On curves
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C.
On ramps
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D.
All of the above
Correct answer: D.
Slow down on wet roads, curves, and ramps — all increase rollover risk.
Question 17 of 25 · Tank Types
What is a "smooth bore" tank?
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A.
A tank with internal baffles
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B.
A tank without internal baffles or compartments
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C.
A heated tank
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D.
A two-compartment tank
Correct answer: B.
Smooth-bore tanks have no internal baffles, so liquid surge is unrestrained.
Question 18 of 25 · Vehicle Dynamics
What can cause a tanker to roll over?
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A.
Sharp turns
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B.
Sudden steering corrections
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C.
Speed too high for road conditions
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D.
All of the above
Correct answer: D.
All of these can cause rollovers; smooth, slow inputs reduce risk.
Question 19 of 25 · Adverse Conditions
What's the safe way to handle a tanker on icy roads?
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A.
Slow down and increase following distance
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B.
Use chains if required
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C.
Avoid sudden braking and steering
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D.
All of the above
Correct answer: D.
Reduced speed, chains where required, and smooth inputs reduce risk on ice.
Question 20 of 25 · Speed Management
What should you do when going around curves with a tanker?
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A.
Slow down well below the posted speed
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B.
Drive at the posted speed limit
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C.
Use the engine retarder
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D.
Lock the brakes
Correct answer: A.
Take curves at speeds well below the posted limit to avoid rollovers.
Question 21 of 25 · Tank Types
What's a key difference between compartmented and smooth-bore tanks?
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A.
Compartmented tanks reduce surge between sections
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B.
Smooth-bore tanks have less surge
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C.
They are the same in terms of surge
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D.
Compartmented tanks are always larger
Correct answer: A.
Compartmented tanks reduce overall surge by limiting movement to each section.
Question 22 of 25 · Loading
What is "outage" requirement for liquids that expand a lot?
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A.
Larger outage required
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B.
Less outage required
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C.
No outage required
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D.
Outage doesn't depend on the liquid
Correct answer: A.
Liquids that expand more (e.g., LPG) require greater outage in the tank.
Question 23 of 25 · Loading
Why must tanker drivers be careful when refueling?
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A.
Risk of fire from spills
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B.
Risk of cargo contamination
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C.
Risk of overloading
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D.
Both A and B
Correct answer: D.
Spills can ignite and cargo can be contaminated by fuel.
Question 24 of 25 · Loading
When loading tanks, what must drivers consider?
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A.
Outage requirements for the liquid
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B.
Weight distribution between compartments
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C.
Surge potential
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D.
All of the above
Correct answer: D.
Outage, weight distribution, and surge management all matter when loading tanks.
Question 25 of 25 · Emergencies
What action should a driver take if a tank starts to leak?
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A.
Stop immediately in a safe area and report the leak
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B.
Continue to destination
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C.
Try to close the leak
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D.
Drive faster
Correct answer: A.
Stop in a safe area, secure the area, and notify the carrier and emergency services.
About the Tank Vehicles Test
The Tank Vehicles test covers inspecting tank vehicles, driving tank vehicles, surge and liquid movement, baffled and unbaffled tanks, outage, and safe driving rules unique to large liquid loads. Tank vehicles handle very differently from dry-freight vehicles because liquid surge can shove the vehicle in the direction the wave moves.
The Rhode Island Division of Motor Vehicles administers this knowledge test as part of its commercial driver license program. To earn the Tank Endorsement (N) on your Rhode Island CDL, you need to score at least 16 out of 20 on the official version.
Topics covered on this practice test
- Vehicle Dynamics: 6 questions
- Loading: 5 questions
- Tank Types: 3 questions
- Adverse Conditions: 2 questions
- Inspection: 2 questions
- Speed Management: 2 questions
- Emergency Equipment: 1 question
- Placards: 1 question
- HazMat Driving: 1 question
- Emergency Maneuvers: 1 question
- Emergencies: 1 question
How to use this practice test
- Read each question carefully. CDL questions are written precisely — small wording differences matter.
- Click "Show Answers & Explanations" only after answering every question. Don't peek mid-test.
- Read the explanation for every question, even ones you got right. The reasoning is more important than the answer.
- Repeat the test until you score 100%. The questions are deterministic per state, so you can track your improvement over multiple sessions.
- Move on to the other endorsement tests for Rhode Island until you're ready for the official exam.
Tips specific to the Tank Vehicles test
Tank vehicle questions focus on liquid surge, outage, smooth-bore versus baffled tanks, high center of gravity, and the special braking and turning techniques required to keep a partially-loaded tank under control. Expect several questions about leak response and load distribution.