CDL glossary

The words the CDL knowledge tests use, with a short meaning and how the test asks about them.

This page is in English. Where a word has a checked translation, it appears after the English term.

Most tested words

hazardous materials HazMat
tehlikeli maddeler
Substances that endanger health, safety or property when transported.
tires
lastik
The rubber casings on the wheels that grip the road.
commercial driver's license CDL
CDL (ticari sürücü belgesi)
A commercial driver's license (CDL) is required to drive a commercial motor vehicle (CMV).
tractor
çekici
The power unit built to pull a semitrailer on its fifth wheel.
placard
tehlike levhaları
A diamond-shaped sign on a vehicle showing its cargo's hazard class.
skid
kayma
The tires lose their grip and the vehicle slides.
commercial motor vehicle CMV
ticari motorlu taşıt
A commercial motor vehicle (CMV) is a heavy truck, big bus, or placarded vehicle.
warning devices
uyarı üçgenleri
Reflective triangles or flares that warn traffic your vehicle is stopped.
brake pedal
fren pedalı
The foot control that sends air to the brakes.
mirrors
yan ayna
Side-mounted glass showing the driver traffic beside and behind the vehicle.
parking brake
el freni
The brake that holds the vehicle still when parked.
traction
çekiş
The grip between the tires and the road surface.

Topics

  • Air brakesHavalı frenler

    Air brakes stop a heavy vehicle with compressed air instead of brake fluid.

    brake pedal, parking brake, air brakes

  • Combination vehicles, doubles and triplesBirleşik araçlar, çift ve üçlü römorklar

    A combination is a tractor or truck pulling one or more trailers.

    tractor, jackknife, triples

  • Hazardous materialsTehlikeli maddeler

    Hazardous materials are cargo that can harm people or property if it spills, burns or leaks.

    hazardous materials, placard, shipping paper

  • Tank vehiclesTanker araçlar

    A tank vehicle carries liquid or gas in bulk.

    tank vehicle, center of gravity, liquid surge

  • Passenger and school busYolcu araçları ve okul servisleri

    These words come from the Passenger and School Bus tests: loading and unloading, emergency exits, railroad crossings and the danger zone around a bus.

    railroad crossing, school bus, emergency exit

  • Pre-trip inspection partsYolculuk öncesi muayene parçaları

    These are the parts you name and check during the pre-trip inspection test.

    tires, warning devices, mirrors

  • Driving and safetySürüş ve güvenlik

    Words from the General Knowledge test about controlling the vehicle: stopping distance, skids, following distance, securing cargo, and the limits on speed, alcohol and fatigue.

    skid, traction, stopping distance

  • License, rules and roadsideCDL, kurallar ve yol kenarı denetimleri

    Who needs a CDL, which class, which endorsements and restrictions, and the rules that follow you on the road: hours of service, medical cards, inspections and disqualification.

    commercial driver's license, commercial motor vehicle, pre-trip inspection

  • Numbers and units on the testSınavdaki sayılar ve birimler

    The test uses US units: feet, miles per hour, psi, pounds and gallons.

    feet, miles per hour, miles

  • Work and freight wordsİş ve yük taşımacılığı kelimeleri

    Words you hear from dispatchers, brokers and shippers in your first weeks.

    shipper, flatbed, dispatcher

A to Z

4.9App Store ve Google Play birleşik puanı · 6.500+ değerlendirme

15 Eki 2026 itibarıyla mağaza puanlarıKendi dilinde çalışan sürücüler için tasarlandı

Bu sitede ücretsiz alıştırma testleri. 2.500'den fazla sorunun tamamı abonelikle uygulamada.