CDL glossary

Most tested words

hazardous materials HazMat

xavfli materiallar

Substances that endanger health, safety or property when transported.

tires

shina

The rubber casings on the wheels that grip the road.

commercial driver's license CDL

CDL (tijorat haydovchilik guvohnomasi)

A commercial driver's license (CDL) is required to drive a commercial motor vehicle (CMV).

tractor

tyagich

The power unit built to pull a semitrailer on its fifth wheel.

placard

xavf belgilari

A diamond-shaped sign on a vehicle showing its cargo's hazard class.

skid

sirpanish

The tires lose their grip and the vehicle slides.

commercial motor vehicle CMV

tijorat transport vositasi

A commercial motor vehicle (CMV) is a heavy truck, big bus, or placarded vehicle.

warning devices

ogohlantirish uchburchaklari

Reflective triangles or flares that warn traffic your vehicle is stopped.

brake pedal

tormoz pedali

The foot control that sends air to the brakes.

mirrors

yon oyna

Side-mounted glass showing the driver traffic beside and behind the vehicle.

parking brake

qo'l tormozi

The brake that holds the vehicle still when parked.

traction

ilashish

The grip between the tires and the road surface.

Topics

• Air brakesHavo tormozlari

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

  brake pedal, parking brake, air brakes

• Combination vehicles, doubles and triplesBiriktirilgan transport, ikki va uch tirkama

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

  tractor, jackknife, triples

• Hazardous materialsXavfli materiallar

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

  hazardous materials, placard, shipping paper

• Tank vehiclesSisterna transport

  A tank vehicle carries liquid or gas in bulk.

  tank vehicle, center of gravity, liquid surge

• Passenger and school busYo'lovchi transport vositalari va maktab avtobuslari

  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 partsSayohat oldidan tekshiruv qismlari

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

  tires, warning devices, mirrors

• Driving and safetyHaydash va xavfsizlik

  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, qoidalar va yo'l chetidagi tekshiruvlar

  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 testImtihondagi raqamlar va o'lchov birliklari

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

  feet, miles per hour, miles

• Work and freight wordsIsh va yuk tashishga oid so'zlar

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

  shipper, flatbed, dispatcher