Delaware Combination Vehicles Test
You'll be coupling trailers near the Port of Wilmington, not just reading about it — this test prepares you for Delaware's chemical tankers and tight I-95 merges.
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20 questions, 80% to pass. This is the test for your Class A endorsement in Delaware.
Key Topics
- •Coupling and uncoupling sequence
- •Rollover prevention and trailer stability
- •Jackknife causes and recovery
About the Delaware Combination Vehicles Test
Topics Covered
- ✓Coupling and uncoupling procedures — Delaware examiners want the exact sequence, especially for fifth-wheel hookups on uneven ground at the Port.
- ✓Trailer stability and rollover prevention — critical when hauling liquid chemicals on Delaware's tight highway shoulders and off-ramps.
- ✓Jackknife causes and prevention — fog and rain on I-95 near the Maryland line make this a common hazard here.
- + 3 more topics
📘 Study Tips & State Info
Delaware examiners focus on the step-by-step coupling procedure. They'll ask you what goes first — always connect the air lines before backing under the trailer. Don't mix up the order. Practice the sequence until it's automatic.
Also, understand how the weight of your load affects stability. In Delaware, you'll see tankers hauling liquid — that surge can push you sideways on a curve. The test will ask about baffled tanks and why they reduce that surge. Know that.
Finally, pay attention to the Delaware CDL manual's section on air brakes. Combination vehicles rely on air systems, and the DMV expects you to know what happens when you lose air pressure. They've seen too many drivers fail on those questions. Use our practice test to drill those concepts.
Delaware DMV handles CDL testing at four main locations: Dover (DMV headquarters), Wilmington (on Governor Printz Boulevard), Newark (on South Chapel Street), and Georgetown (on South Bedford Street). You must make an appointment for the written knowledge tests — walk-ins are not guaranteed. Schedule online through the Delaware DMV portal.
You'll need to bring your valid Delaware driver's license, Social Security card, proof of residency, and a current Medical Examiner's Certificate (DOT physical). The Combination Vehicles test fee is included in your CDL permit application fee, which is $40. If you're adding the endorsement later, it's $10.
Delaware doesn't require a separate skills test for the Combination Vehicles endorsement — it's part of the Class A road test. But you must pass the written knowledge test first. The test is available in English and Spanish. No commercial learner's permit? You'll take this test as part of your CLP application.
About the Delaware Combination Vehicles Test
If you're going for a Class A CDL in Delaware, you need the Combination Vehicles endorsement. That means you'll be driving tractor-trailers, doubles, or triples on roads like I-95, I-495, and the Delaware Memorial Bridge. This test covers everything from coupling to controlling a trailer when the fog rolls in off the Delaware Bay.
Delaware's a small state, but it moves a lot of freight. The Port of Wilmington handles chemicals, cars, and produce. You'll see tankers and reefers every day. That's why the Combination Vehicles test here isn't just theory — it's about real situations like backing a trailer into a loading dock at the Port or keeping a loaded tanker stable on the I-295 curves near the bridge.
The test follows federal standards, so the material matches what you'd see anywhere. But Delaware examiners pay close attention to coupling procedures and rollover prevention because of the heavy chemical traffic. They've seen too many jackknife incidents on wet roads near the refineries.
You'll take this test at a Delaware DMV location — Dover, Wilmington, Newark, or Georgetown. You need a passing score of 80% (16 out of 20). Use our practice test to get comfortable with the question style before you walk in.
Topics Covered
Study Tips
Delaware examiners focus on the step-by-step coupling procedure. They'll ask you what goes first — always connect the air lines before backing under the trailer. Don't mix up the order. Practice the sequence until it's automatic.
Also, understand how the weight of your load affects stability. In Delaware, you'll see tankers hauling liquid — that surge can push you sideways on a curve. The test will ask about baffled tanks and why they reduce that surge. Know that.
Finally, pay attention to the Delaware CDL manual's section on air brakes. Combination vehicles rely on air systems, and the DMV expects you to know what happens when you lose air pressure. They've seen too many drivers fail on those questions. Use our practice test to drill those concepts.
Delaware Specific Information
Delaware DMV handles CDL testing at four main locations: Dover (DMV headquarters), Wilmington (on Governor Printz Boulevard), Newark (on South Chapel Street), and Georgetown (on South Bedford Street). You must make an appointment for the written knowledge tests — walk-ins are not guaranteed. Schedule online through the Delaware DMV portal.
You'll need to bring your valid Delaware driver's license, Social Security card, proof of residency, and a current Medical Examiner's Certificate (DOT physical). The Combination Vehicles test fee is included in your CDL permit application fee, which is $40. If you're adding the endorsement later, it's $10.
Delaware doesn't require a separate skills test for the Combination Vehicles endorsement — it's part of the Class A road test. But you must pass the written knowledge test first. The test is available in English and Spanish. No commercial learner's permit? You'll take this test as part of your CLP application.