Combination #1

FREE CDL Combination Vehicles Practice Test Online | Iowa 2024

Train for FREE online with our Iowa CDL combination vehicle test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a IA combination license in 2021, practice as much as..

Train for FREE online with our Iowa CDL combination vehicle test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a IA combination license in 2021, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that DMV requirements for issuing a combination license may vary from state to state.

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1 . The best way to recognize that your trailer has started to skid is by:

The easiest way to become aware that your trailer has begun to jackknife is to observe it in your mirrors. Checking your trailer in your mirrors will also allow you to spot any skidding at the earliest possible moment.

2 . In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:

In vehicles equipped with an automatic tractor protection valve, the valve will pop out if air pressure drops to a level between 20 and 45 psi. When the valve pops out, the protection valve will close, stopping the flow of air.

3 . Fully-loaded rigs:

Fully-loaded rigs are more vulnerable to rolling over than empty rigs because the weight of the cargo gives the vehicles higher centers of gravity.

4 . Keeping cargo centered on a rig can:

A rollover is more likely if cargo is unevenly loaded in a rig. To help prevent a dangerous rollover, it is important to keep a load as centered on the rig as possible.

5 . When you are pulling a trailer, the air supply control lever should be in its ____ position.

Tractor protection controls in older vehicles may be operated by levers instead of knobs. If an air supply control is set in its "normal" position, it is properly set for you to pull a trailer.

6 . Trailers built before ____ are not required to have spring brakes.

Trailers built before 1975 are not required to have spring brakes. When parking a trailer without spring brakes, be sure to use wheel chocks to prevent the trailer from rolling.

7 . What does an Anti-Lock Braking System (ABS) do?

An Anti-Lock Braking System (ABS) helps prevent wheel lockup during hard braking. If ABS detects impending lockup, it reduces braking pressure to a safe level.

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2024 Iowa | Frequently Asked Questions

A CDL Class A license in Iowa is defined as a commercial driver's license that permits the holder to operate any combination of vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, provided the GVWR of the vehicle(s) being towed is in excess of 10,000 pounds. This includes tractor-trailers, truck and trailer combinations.
A Class A CDL license in Iowa allows the holder to operate various types of vehicles including tractor-trailers, truck and trailer combinations, tank vehicles, livestock carriers, and flatbeds. The license covers vehicles with a Gross Vehicle Weight Rating (GVWR) over 26,001 pounds and the towed vehicle is more than 10,000 pounds.
To obtain a Class A CDL license in Iowa, you must be at least 18 years old (21 for interstate driving), possess a valid non-commercial driver's license, and pass a vision test. You'll also need to pass written knowledge tests, a skills test, and a pre-trip vehicle inspection. For certain endorsements like hazardous materials, a background check is required.
In Iowa, you must be at least 18 years old to qualify for a Class A CDL license. However, please note that while you can obtain a CDL at 18, federal law requires drivers to be at least 21 years old to drive commercial vehicles across state lines or to transport hazardous materials.
Specific endorsements aren't required for a Class A CDL license in Iowa but they can enhance your license. Endorsements like "T" for double/triple trailers, "P" for passenger vehicles, or "H" for hazardous materials allow you to operate specific types of vehicles or carry certain types of cargo. Each endorsement requires passing additional tests.
The Class A CDL skills test in Iowa encompasses three main areas: pre-trip inspection, basic vehicle control, and on-road driving. The pre-trip inspection tests your ability to inspect your vehicle before driving. Basic vehicle control assesses your ability to control the vehicle. On-road driving tests your ability to drive the vehicle in various traffic situations, including turns, intersections, and highway driving.
Yes, Class A CDL license holders in Iowa may face limitations based on their medical qualifications, the type of vehicle they're allowed to operate, and the cargo they can transport. This could result in restrictions such as "No passengers", "Intrastate only", or "No air brake equipped". Also, drivers under 21 are limited to intrastate operation only.
In Iowa, the written Class A CDL test is primarily administered in English. However, some locations may offer the test in Spanish. It's important to note that even if the test is taken in Spanish, the Federal Motor Carrier Safety Administration requires all commercial drivers to read and speak English sufficiently to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, you can request accommodations for the Class A CDL written test in Iowa if you have a disability. The Iowa Department of Transportation is committed to providing reasonable accommodations in accordance with the Americans with Disabilities Act. You should contact your local DOT office in advance to discuss your needs and arrange for modifications or aids to assist you during the test.
Yes, if you don't pass the Class A CDL written test in Iowa, you can retake it. However, you must wait at least one day before retaking the test. Please note that there may be additional fees for each retest. It's advised to review your study materials thoroughly before attempting the test again to increase your chances of passing.

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