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 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.
20
16
20
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.
2024 Iowa | Frequently Asked Questions
A CDL Class B license in Iowa is designated for drivers operating vehicles with a Gross Vehicle Weight Rating (GVWR) exceeding 26,000 pounds, or towing vehicles not exceeding 10,000 pounds. This includes buses, dump trucks, straight trucks, and other large freight trucks. Drivers must pass knowledge and skills tests to obtain this license. Age and health requirements also apply.
A Class B CDL license in Iowa allows the holder to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds. This includes large passenger buses, segmented buses, straight trucks, dump trucks, delivery trucks, and utility trucks.
To acquire a Class B CDL license in Iowa, applicants must be at least 18 years old (21 for interstate driving), possess a valid non-commercial driver's license, and pass a vision test. They must also pass a general knowledge test and a skills test, which includes a pre-trip vehicle inspection, a basic controls test, and a driving test. Medical examinations are also required.
To qualify for a Class B Commercial Driver's License (CDL) in Iowa, you must be at least 18 years old. However, you must be 21 years or older if you plan to drive across state lines, carry hazardous materials, or drive a vehicle designed to transport 16 or more passengers, including the driver.
Specific endorsements aren't necessary for a Class B CDL license, but they can enhance your license. Endorsements allow you to drive certain types of vehicles, like school buses, tank vehicles, or vehicles carrying hazardous materials. To get an endorsement, you'll need to pass additional written and skills tests.
The Class B CDL skills assessment in Iowa includes a pre-trip vehicle inspection, where you demonstrate knowledge about your vehicle and its safety. It also includes a basic controls test, where you show your ability to control the vehicle. Lastly, it encompasses a driving test, where you demonstrate safe driving practices on public roads.
Yes, Class B CDL license holders in Iowa are limited to operating vehicles under 26,001 pounds or towing vehicles not exceeding 10,000 pounds. They can drive buses, farm labor vehicles, and any fire-fighting or emergency vehicles. However, they cannot operate Class A vehicles without the proper endorsements. Interstate driving is not allowed until the age of 21.
Yes, in Iowa, the written Class B CDL test can be taken in Spanish. However, 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, accommodations can be made for individuals with disabilities taking the Class B CDL written exam in Iowa. You need to request these accommodations in advance when scheduling your exam. Accommodations may include extended time, a separate testing room, or use of assistive technology. Always check with your local DMV office for specific procedures and requirements.
Yes, if you don't pass the Class B CDL written test in Iowa, you can retake it. However, you must wait at least one day before retaking the test. There may be additional fees for each retest. If you fail the test several times, you might be required to wait a longer period before your next attempt.