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Delaware Doubles and Triples Test

You'll haul doubles on I-95 through Delaware's tight construction zones – this test preps you for that.

Questions

80%

To Pass

Minutes

93 questions · 25 min time limit · 80% to pass

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Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Delaware CDL handbook and FMCSA regulations.

About the Delaware Doubles and Triples Test

Delaware's roads work hard for its trucking industry. You'll find doubles and triples rolling along I-95 near the Port of Wilmington, hauling cargo from the docks to the rest of the Mid-Atlantic. Those tight ramps and merging lanes don't leave much room for error – one wrong move with a 28-foot trailer and you're chewing up a guardrail.

The Delaware Memorial Bridge adds another layer of challenge. Crosswinds from the Delaware River can push a set of doubles sideways, and the steep approaches demand precise gear selection. Our state's coastal fog, especially around Lewes and Rehoboth, reduces visibility fast. You need to know how to handle your rig before that white curtain drops.

Local farms and poultry plants in Sussex County depend on doubles for grain and feed deliveries. But those rural roads aren't built for long combos. Tight turns, unpaved shoulders, and sudden stops for horse-drawn buggies – you've got to stay sharp. That's why this practice test focuses on real Delaware scenarios, not just generic textbook rules.

We cover everything from coupling procedures to cargo weight distribution. Each question pulls from the Delaware CDL manual, so you won't waste time on information that doesn't apply. Take it once, take it twice – just get ready for the DMV test.

Topics Covered

✓Coupling and uncoupling – critical on Delaware's tight loading docks at the Port of Wilmington.

✓Air brake checks – the salt spray on the Delaware Memorial Bridge eats at your lines, so inspections matter.

✓Cargo weight distribution – keep your tandems legal on Delaware's agricultural weigh stations.

✓Speed and stopping distances – I-95's Sudlersville curve demands slower speeds with doubles.

✓Off-tracking – you'll need this to navigate Georgetown's narrow downtown streets.

✓Emergency procedures – Delaware's fog and deer crossings require quick corrective actions.

Study Tips

Study the Delaware CDL manual's Doubles and Triples section before you start. Pay close attention to the coupling steps – they love to test the order of actions. You'll also find diagrams of the dolly and pintle hook, so know those parts cold.

Take this practice test multiple times. Each attempt shuffles the questions, and you'll start spotting patterns. Delaware DMV uses the same question bank, so you're not guessing. After the test, review every wrong answer – the manual explains why it's right.

Don't skip the air brake questions. Even though the Doubles test is separate, you need to know brake timing for combinations. Delaware's inspectors check for brake lag at every inspection point. Get that wrong and you fail.

Delaware Specific Information

Delaware CDL written tests are by appointment only at select DMV locations. You can take the Doubles and Triples endorsement test at Dover, Wilmington, or Georgetown DMV offices. Walk-ins aren't guaranteed, so schedule online at least a week ahead.

The fee for the Doubles and Triples endorsement is $10. You'll also need a valid CDL and a medical card on file. If you're adding the endorsement for the first time, bring your current license and proof of residency. The test has 20 questions, you need 16 correct to pass.

For the road test, you'll need to bring a vehicle with doubles or triples. Most rental yards in Delaware don't offer combos, so check with a local trucking company or driving school. The DMV won't provide a rig.

Frequently Asked Questions

Do I need a separate endorsement for doubles and triples in Delaware?

Yes. You need the T endorsement on your CDL to pull any combination with two or three trailers. It's a separate written test and road test.

Where can I take the Delaware CDL doubles/triples written test?

You can take it at any Delaware DMV that offers CDL knowledge tests. That includes Dover, Wilmington, and Georgetown. Make an appointment online first.

How many questions on the Delaware doubles/triples test?

The test has 20 multiple-choice questions. You need to answer at least 16 correctly, that's an 80% score.

What's the passing score in Delaware for this endorsement?

80% or 16 out of 20 correct. If you don't pass, you can retake it the next day for another $10 fee.

Can I practice with a rental trailer in Delaware?

Rental yards don't usually let you couple two trailers together for practice. Your best bet is a truck driving school or a company that runs doubles – ask them for supervised time.

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content