Mixed Deck — All SD CDL Topics Flashcards

Sample question 6 for Safe Driving Practices & Hazard Awareness?

Answer: Answer B

Without the actual question text and options for this South Dakota CDL sample question, a specific explanation for why 'Answer B' is correct cannot be provided. In the context of a multiple-choice exam, 'Answer B' is designated as the correct response, and its validity would depend on the specific scenario or rule being tested under Safe Driving Practices & Hazard Awareness.

You are driving a truck with a sealed container load and cannot inspect the cargo inside. What are you still responsible for?

Answer: Making sure the gross weight and axle weight limits are not exceeded.

Even with a sealed load where the contents cannot be inspected, the driver is always responsible for ensuring the vehicle does not exceed the legal gross weight and individual axle weight limits.

Sample question 7 for Transporting Cargo & Passengers Safely?

Answer: Answer B

Without the actual question text and options for this South Dakota CDL sample question, a specific explanation for why 'Answer B' is correct cannot be provided. In the context of a multiple-choice exam, 'Answer B' is designated as the correct response, and its validity would depend on the specific scenario or rule being tested under Transporting Cargo & Passengers Safely.

When must a driver re-check their cargo and securing devices after the initial inspection?

Answer: After driving for 3 hours or 150 miles, and after every break.

Federal regulations, which South Dakota follows, require drivers to re-check their cargo and securement systems after the first 50 miles, and then again whenever they change their duty status, after driving for 3 hours, or after driving for 150 miles, whichever comes first.

A driver performing a pre-trip inspection on a vehicle with air brakes notices that the low-pressure warning light and buzzer activate. At or before what pressure must this warning occur?

Answer: 55 PSI

According to the standardized CDL air brake check procedure, the low air pressure warning devices (light and/or buzzer) must activate at or before the pressure drops to 55 PSI to provide the driver with adequate warning of a potential braking system failure.

During the walk-around inspection of a combination vehicle, what is a critical check for the fifth wheel assembly after coupling to a trailer?

Answer: Verifying that the locking jaws are fully closed around the kingpin and the release handle is in the locked position.

A secure connection is paramount. The driver must visually confirm that the locking jaws have properly engaged the trailer's kingpin. There should be no gap between the trailer apron and the fifth wheel skid plate, and the release handle must be in the correct position. A tug test should also be performed.

A driver has exhausted their 11-hour driving allowance but still has time remaining in their 14-hour on-duty window. What may the driver do?

Answer: Perform non-driving on-duty tasks but not drive

Once the 11-hour driving limit is reached, the driver may not drive again until taking 10 consecutive hours off duty, but can still perform non-driving duties within the 14-hour window.

Which part of the vehicle must you test during the brake system check?

Answer: Air, service, and parking brakes

A comprehensive brake system check for a commercial vehicle must include all components: the air brake system (if applicable), the service brakes (foot pedal), and the parking brake. Testing each ensures that the vehicle can be safely stopped, slowed, and held stationary. This thorough inspection is critical for preventing brake failures and ensuring road safety for the driver and others.

When must a bus driver stop at a railroad-highway grade crossing?

Answer: The driver must stop at all railroad crossings.

Regardless of whether lights are flashing, gates are down, or a train is visible, regulations require all buses carrying passengers to stop at all railroad-highway grade crossings. The stop must be made between 15 and 50 feet before the nearest rail.

Sample question 9 for CDL Laws, Endorsements & Regulations?

Answer: Answer B

Without the actual question text and options for this South Dakota CDL sample question, a specific explanation for why 'Answer B' is correct cannot be provided. In the context of a multiple-choice exam, 'Answer B' is designated as the correct response, and its validity would depend on the specific scenario or rule being tested under CDL Laws, Endorsements & Regulations.

Under which condition should a driver AVOID using an engine retarder or "jake brake"?

Answer: When the roadway is wet, icy, or covered in snow.

Retarders apply braking force only to the drive wheels. On surfaces with poor traction, such as those that are wet, icy, or snow-covered, using the retarder can cause the drive wheels to lock up and skid, potentially leading to a loss of vehicle control. Therefore, retarders should be turned off in such conditions.

What is the primary purpose of the 'standee line' on a bus?

Answer: To indicate the forward-most point where passengers may stand to ensure the driver's view is not obstructed.

The standee line, a line on the floor behind the driver's seat, marks the area that passengers may not occupy while the bus is in motion. This regulation ensures that the driver has a clear field of vision and is free from distractions or crowding by passengers.

A driver is operating a truck with a dual air brake system. The low air pressure warning light and buzzer activate. What is the most likely pressure range in one of the systems?

Answer: Below 60 psi

The low air pressure warning devices (light, buzzer, or wig wag) are required to activate before the air pressure in either the primary or secondary system drops below 60 psi.

Sample question 8 for Safe Driving Practices & Hazard Awareness?

Answer: Answer B

Without the actual question text and options for this South Dakota CDL sample question, a specific explanation for why 'Answer B' is correct cannot be provided. In the context of a multiple-choice exam, 'Answer B' is designated as the correct response, and its validity would depend on the specific scenario or rule being tested under Safe Driving Practices & Hazard Awareness.

Sample question 2 for Safe Driving Practices & Hazard Awareness?

Answer: Answer B

As this is a sample question without specific content, the correct answer 'Answer B' would represent the most appropriate or safest driving practice among the given options in a real scenario. It would align with established safety regulations and best practices for commercial vehicle operation and hazard awareness, ensuring driver and public safety.

What is the maximum on-duty window (including driving time) allowed for a property-carrying CMV driver in a single shift?

Answer: 14 hours

Property-carrying drivers cannot drive beyond the 14th consecutive hour after coming on duty, regardless of how many breaks were taken.

How many consecutive hours off duty are required to use the 34-hour restart provision and reset a driver's weekly on-duty hours?

Answer: 34 hours

Taking 34 or more consecutive hours off duty allows a driver to restart their 60/70-hour clock, resetting the accumulated weekly on-duty total.

A driver is loading a dense liquid into a large tank. Even if the tank is not filled to its volume capacity, what is the most likely reason the driver must stop loading?

Answer: The legal weight limit for the vehicle has been reached.

Dense liquids are very heavy. A tank may be only partially full by volume, but the weight of the liquid can cause the vehicle to reach its maximum legal gross weight limit.

Under what condition does a combination vehicle, particularly a tractor-trailer, take longer to stop?

Answer: When it is empty or lightly loaded.

Counterintuitively, large combination vehicles often take longer to stop when empty or lightly loaded. This is because the stiff suspension and powerful brakes have poor traction on the light vehicle, making it very easy for the wheels to lock up and skid.

Sample question 7 for CDL Laws, Endorsements & Regulations?

Answer: Answer B

Without the actual question text and options for this South Dakota CDL sample question, a specific explanation for why 'Answer B' is correct cannot be provided. In the context of a multiple-choice exam, 'Answer B' is designated as the correct response, and its validity would depend on the specific scenario or rule being tested under CDL Laws, Endorsements & Regulations.