Knowledge Test Class B
This license is required for driving a single vehicle with a GVWR of more than 26,001 pounds, and a trailer not to exceed 10,000 pounds gross vehicle weight rating, or a vehicle designed to transport 24 or more people (including the driver). To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three possible answer choices. Test questions come from the Idaho Commercial Driver’s License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving.. Endorsements that may be used with a Class B CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.
Number of Question
Passing Score
36. When traveling down a steep downgrade:
Explanation
On long and/or steep downgrades, you should primarily use engine braking to control the speed of your vehicle. Use your brakes only as a supplement to this effect.
37. Foundation brakes are used:
Explanation
Foundation brakes are used on each wheel of a CMV. The most common type of foundation brake is the s-cam drum brake.
38. Mirrors should be:
Explanation
When driving, you should regularly check your mirrors, both to be aware of traffic and to check for problems on your own vehicle.
39. Steering wheel play should be no more than:
Explanation
A steering wheel should have no more than 10 degrees of play. This is equal to about two inches of movement at the rim of a 20-inch wheel. If there is more play than this, it may be difficult to steer.
40. Roads are especially slippery right after it begins to rain because:
Explanation
Roads are often especially slippery when it first begins to rain. Rainwater forms a slick film when mixed with oil and grease on the road surface that has not yet washed away.
41. If convicted of a traffic violation in your personal car:
Explanation
If you are convicted of any traffic violations while driving any vehicle, you must notify your employer within 30 days of the conviction. This rule excludes parking violations.
42. A fatigued driver:
Explanation
Fatigued drivers are slower to see or react to hazards than drivers who are not fatigued. Drivers are impaired in their ability to make critical decisions when they are driving drowsy.
Frequently Asked Questions
A Class B CDL (Commercial Driver's License) in Idaho allows a driver to operate a single vehicle with a weight of 26,001 or more pounds, or a combination of vehicles that have a combined weight of 26,001 or more pounds, but with a towed vehicle that weighs less than 10,000 pounds.
Here are the steps to obtain a Class B CDL in Idaho:
1. Meet the eligibility requirements: You must be at least 18 years old, have a valid Idaho driver's license, and pass a medical examination.
2. Obtain a commercial learner's permit (CLP): To get a CLP, you must pass the knowledge test for the Class B CDL and any endorsements you need, such as hazardous materials or passenger transport. You must hold the CLP for at least 14 days before taking the skills test.
3. Practice driving: During this time you should practice driving with someone who holds a Class B CDL.
4. Schedule and pass the skills test: The skills test consists of three parts - pre-trip inspection, basic vehicle control, and on-road driving test. You must provide your own vehicle for the test.
5. Pay the fees and obtain your Class B CDL: Once you pass the skills test, pay the required fees to obtain your Class B CDL license.
It is important to note that additional endorsements may be required for certain types of vehicles or cargo, such as hazardous materials or passenger transport.
Here are the steps to obtain a Class B CDL in Idaho:
1. Meet the eligibility requirements: You must be at least 18 years old, have a valid Idaho driver's license, and pass a medical examination.
2. Obtain a commercial learner's permit (CLP): To get a CLP, you must pass the knowledge test for the Class B CDL and any endorsements you need, such as hazardous materials or passenger transport. You must hold the CLP for at least 14 days before taking the skills test.
3. Practice driving: During this time you should practice driving with someone who holds a Class B CDL.
4. Schedule and pass the skills test: The skills test consists of three parts - pre-trip inspection, basic vehicle control, and on-road driving test. You must provide your own vehicle for the test.
5. Pay the fees and obtain your Class B CDL: Once you pass the skills test, pay the required fees to obtain your Class B CDL license.
It is important to note that additional endorsements may be required for certain types of vehicles or cargo, such as hazardous materials or passenger transport.
With a Class B CDL license in Idaho, you are authorized to operate the following vehicles:
1. Single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more.
2. Combination of vehicles with a combined GVWR of 26,001 pounds or more, where the towed vehicle has a GVWR of less than 10,000 pounds.
3. Single or combination of vehicles used in the transportation of hazardous materials that require placards.
It is important to note that additional endorsements may be required for certain types of vehicles or cargo, such as passenger transport or hazardous materials. If you are unsure about your specific situation, you should contact the Idaho Department of Transportation for guidance.
1. Single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more.
2. Combination of vehicles with a combined GVWR of 26,001 pounds or more, where the towed vehicle has a GVWR of less than 10,000 pounds.
3. Single or combination of vehicles used in the transportation of hazardous materials that require placards.
It is important to note that additional endorsements may be required for certain types of vehicles or cargo, such as passenger transport or hazardous materials. If you are unsure about your specific situation, you should contact the Idaho Department of Transportation for guidance.
To obtain a Class B CDL (Commercial Driver's License) license in Idaho, you must meet the following requirements:
1. Age: You must be at least 18 years old to drive within the state of Idaho and at least 21 years old to drive across state lines or transport hazardous materials.
2. Hold a valid Idaho driver's license: You must have a valid Idaho driver's license.
3. Pass a medical examination: You must pass a medical examination that meets the standards as set forth by the Federal Motor Carrier Safety Administration (FMCSA).
4. Obtain a Commercial Learner's Permit (CLP): To obtain a CLP, you must pass a knowledge test for the Class B CDL and any endorsements you need, such as hazardous materials or passenger transport.
5. Hold the CLP for at least 14 days: You must hold your CLP for at least 14 days before taking the skills test.
6. Pass the skills test: The skills test consists of three parts - pre-trip inspection, basic vehicle control, and on-road driving test. You must provide your own vehicle for the test.
7. Pay fees and obtain your Class B CDL: Once you pass the skills test, pay the required fees to obtain your Class B CDL license.
It is important to note that additional endorsements may be required for certain types of vehicles or cargo, such as hazardous materials or passenger transport.
1. Age: You must be at least 18 years old to drive within the state of Idaho and at least 21 years old to drive across state lines or transport hazardous materials.
2. Hold a valid Idaho driver's license: You must have a valid Idaho driver's license.
3. Pass a medical examination: You must pass a medical examination that meets the standards as set forth by the Federal Motor Carrier Safety Administration (FMCSA).
4. Obtain a Commercial Learner's Permit (CLP): To obtain a CLP, you must pass a knowledge test for the Class B CDL and any endorsements you need, such as hazardous materials or passenger transport.
5. Hold the CLP for at least 14 days: You must hold your CLP for at least 14 days before taking the skills test.
6. Pass the skills test: The skills test consists of three parts - pre-trip inspection, basic vehicle control, and on-road driving test. You must provide your own vehicle for the test.
7. Pay fees and obtain your Class B CDL: Once you pass the skills test, pay the required fees to obtain your Class B CDL license.
It is important to note that additional endorsements may be required for certain types of vehicles or cargo, such as hazardous materials or passenger transport.
The minimum age requirement for obtaining a Class B CDL (Commercial Driver's License) license in Idaho is 18 years old. However, if you are planning to operate a commercial vehicle across state lines or transport hazardous materials, you must be at least 21 years old.
It is important to note that some employers may have their own age requirements for hiring drivers, which may be higher than the state minimum. Additionally, certain endorsements may have their own age requirements as well. For example, to obtain a passenger endorsement in Idaho, you must be at least 21 years old.
It is important to note that some employers may have their own age requirements for hiring drivers, which may be higher than the state minimum. Additionally, certain endorsements may have their own age requirements as well. For example, to obtain a passenger endorsement in Idaho, you must be at least 21 years old.
You may need endorsements for a Class B CDL (Commercial Driver's License) license depending on the type of vehicle you plan to operate and the cargo you plan to transport. Some common endorsements for a Class B CDL include:
1. Passenger endorsement: This endorsement is required if you plan to drive a vehicle designed to transport more than 16 passengers, including the driver.
2. School bus endorsement: This endorsement is required if you plan to drive a school bus.
3. Hazardous materials endorsement: This endorsement is required if you plan to transport hazardous materials.
4. Tanker endorsement: This endorsement is required if you plan to transport liquids or gases in tanks.
5. Double/triple trailer endorsement: This endorsement is required if you plan to tow double or triple trailers.
To obtain endorsements, you must pass additional knowledge and skills tests specific to the type of endorsement you need. It is important to note that some endorsements may have additional requirements, such as background checks or fingerprinting.
1. Passenger endorsement: This endorsement is required if you plan to drive a vehicle designed to transport more than 16 passengers, including the driver.
2. School bus endorsement: This endorsement is required if you plan to drive a school bus.
3. Hazardous materials endorsement: This endorsement is required if you plan to transport hazardous materials.
4. Tanker endorsement: This endorsement is required if you plan to transport liquids or gases in tanks.
5. Double/triple trailer endorsement: This endorsement is required if you plan to tow double or triple trailers.
To obtain endorsements, you must pass additional knowledge and skills tests specific to the type of endorsement you need. It is important to note that some endorsements may have additional requirements, such as background checks or fingerprinting.
The Class B CDL (Commercial Driver's License) skills test in Idaho consists of three parts:
1. Pre-trip inspection: You will be required to perform a thorough inspection of your vehicle and explain to the examiner what you are inspecting and why.
2. Basic vehicle control: You will be tested on your ability to control the vehicle in a closed course setting. This may include backing up, turning, and maneuvering through cones.
3. On-road driving: You will be required to demonstrate your ability to safely operate the vehicle on public roads. The examiner will evaluate your ability to obey traffic laws, use proper defensive driving techniques, and communicate effectively with other drivers.
It is important to note that the skills test must be conducted in a vehicle that is representative of the class of license you are seeking. If you are seeking a Class B CDL license, you must take the skills test in a Class B vehicle.
Additionally, it is highly recommended that you practice with a qualified instructor or experienced driver before taking the skills test. This will help ensure that you are confident in your abilities and prepared for the test.
1. Pre-trip inspection: You will be required to perform a thorough inspection of your vehicle and explain to the examiner what you are inspecting and why.
2. Basic vehicle control: You will be tested on your ability to control the vehicle in a closed course setting. This may include backing up, turning, and maneuvering through cones.
3. On-road driving: You will be required to demonstrate your ability to safely operate the vehicle on public roads. The examiner will evaluate your ability to obey traffic laws, use proper defensive driving techniques, and communicate effectively with other drivers.
It is important to note that the skills test must be conducted in a vehicle that is representative of the class of license you are seeking. If you are seeking a Class B CDL license, you must take the skills test in a Class B vehicle.
Additionally, it is highly recommended that you practice with a qualified instructor or experienced driver before taking the skills test. This will help ensure that you are confident in your abilities and prepared for the test.
Yes, there are some restrictions and limitations for drivers with a Class B CDL (Commercial Driver's License) license in Idaho. Some of the common restrictions include:
1. No passengers in a commercial bus: If you have a Class B CDL with a passenger endorsement, you are not allowed to transport passengers in a commercial bus.
2. No hazardous materials: If you do not have a hazardous materials endorsement, you are not allowed to transport hazardous materials.
3. No triple trailers: If you do not have a double/triple trailer endorsement, you are not allowed to tow triple trailers.
4. No air brakes: If you do not have an air brake endorsement, you are not allowed to operate vehicles with air brakes.
5. No interstate commerce: If you are under the age of 21, you are not allowed to operate a commercial vehicle across state lines.
It is important to note that these restrictions and limitations may vary depending on the specific endorsements and type of Class B CDL license that you hold. It is your responsibility as a driver to understand and comply with all applicable rules and regulations.
1. No passengers in a commercial bus: If you have a Class B CDL with a passenger endorsement, you are not allowed to transport passengers in a commercial bus.
2. No hazardous materials: If you do not have a hazardous materials endorsement, you are not allowed to transport hazardous materials.
3. No triple trailers: If you do not have a double/triple trailer endorsement, you are not allowed to tow triple trailers.
4. No air brakes: If you do not have an air brake endorsement, you are not allowed to operate vehicles with air brakes.
5. No interstate commerce: If you are under the age of 21, you are not allowed to operate a commercial vehicle across state lines.
It is important to note that these restrictions and limitations may vary depending on the specific endorsements and type of Class B CDL license that you hold. It is your responsibility as a driver to understand and comply with all applicable rules and regulations.
In Idaho, the Class B CDL (Commercial Driver's License) written test is available in English and Spanish. Applicants who are not fluent in English or Spanish may bring an interpreter to assist them with taking the written test. However, the interpreter must be at least 18 years old and cannot be a family member or close friend. The interpreter will need to sign an affidavit stating that they will provide an accurate translation of the test questions and answers. It is important to note that the use of an interpreter may extend the time it takes to complete the written test. Additionally, any person using an interpreter must provide their own interpreter and are responsible for any costs associated with using an interpreter.
Yes, you can request accommodations for the Class B CDL (Commercial Driver's License) written test if you have a disability that affects your ability to take the test under standard conditions. The Americans with Disabilities Act (ADA) requires testing agencies to provide reasonable accommodations to individuals with disabilities.
To request accommodations, you will need to contact the Idaho Transportation Department (ITD) and complete their application for accommodation form. You will need to provide documentation of your disability and how it specifically impacts your ability to take the test. ITD may require additional documentation from a medical professional to support your request.
Examples of accommodations that may be provided include extended testing time, a separate testing room, or special equipment such as a Braille test or screen reader software. The specific accommodations provided will depend on your individual needs and the resources available at the testing location.
It is important to note that requests for accommodations must be made in advance of taking the test, as it may take some time for ITD to process your request and make arrangements for the accommodations.
To request accommodations, you will need to contact the Idaho Transportation Department (ITD) and complete their application for accommodation form. You will need to provide documentation of your disability and how it specifically impacts your ability to take the test. ITD may require additional documentation from a medical professional to support your request.
Examples of accommodations that may be provided include extended testing time, a separate testing room, or special equipment such as a Braille test or screen reader software. The specific accommodations provided will depend on your individual needs and the resources available at the testing location.
It is important to note that requests for accommodations must be made in advance of taking the test, as it may take some time for ITD to process your request and make arrangements for the accommodations.
If you fail the Class B CDL (Commercial Driver's License) written test, you can retake it. However, you will need to wait at least one day before retaking the test. The cost to retake the test may also vary depending on the testing location.
It is important to note that if you fail the written test three times, you will need to wait at least 30 days before taking it again. Additionally, if you fail the test six times within a 12-month period, you will need to wait at least one year before taking it again.
To prepare for the Class B CDL written test, you can study the Idaho Commercial Driver's License Manual, which is available online or in print at any Idaho DMV office. You can also take practice tests online or through third-party study materials.
If you are having difficulty passing the written test, you may want to consider enrolling in a CDL training program or working with a tutor to help improve your understanding of the material.
It is important to note that if you fail the written test three times, you will need to wait at least 30 days before taking it again. Additionally, if you fail the test six times within a 12-month period, you will need to wait at least one year before taking it again.
To prepare for the Class B CDL written test, you can study the Idaho Commercial Driver's License Manual, which is available online or in print at any Idaho DMV office. You can also take practice tests online or through third-party study materials.
If you are having difficulty passing the written test, you may want to consider enrolling in a CDL training program or working with a tutor to help improve your understanding of the material.
