South Carolina CDL Driving Rules Practice Test 3

Question 1

What should a driver do immediately if they detect any defective lights during a pre-trip inspection?

Accepted Answer

Replace them before starting the trip.

Answer

Note it on the DVIR and proceed with the trip.

Answer

Inform the company after the trip.

Question 2

What should be checked regarding the overall condition of belts and hoses in the engine compartment?

Accepted Answer

If any are loose, frayed, cracked, or rotting.

Answer

Their color.

Answer

Their brand.

Question 3

What is the purpose of checking for unusual buildup of grease, oil, dirt, or other materials in the engine bay?

Accepted Answer

To identify potential fire hazards.

Answer

To determine the vehicle's maintenance schedule.

Answer

To assess the engine's age.

Question 4

What is the primary reason for a CMV driver to scan ahead on the road about 15 seconds?

Accepted Answer

To identify traffic issues, work zones, and other dangers.

Answer

To calculate fuel consumption.

Answer

To find the nearest rest stop.

Question 5

What is a key characteristic of safe wide turns for trucks and buses?

Accepted Answer

They need extra space and time to be made carefully.

Answer

They require less space than car turns.

Answer

They should be done quickly to avoid traffic.

Question 6

What should a driver do if they are feeling ill or using medications that make them drowsy?

Accepted Answer

Avoid driving.

Answer

Drive cautiously.

Answer

Take more medication.

Question 7

What is the purpose of signaling and braking early?

Accepted Answer

To give other drivers plenty of time to notice your intent.

Answer

To surprise other drivers.

Answer

To test the brake lights.

Question 8

What is the recommended rate of air pressure build-up for dual air systems from 85 psi to 100 psi?

Accepted Answer

Within 45 seconds.

Answer

Within 60 seconds.

Answer

Within 30 seconds.

Question 9

What should a driver do if the parking brake valve does not pop out around 20 psi during the spring brake test for triple reservoir vehicles?

Accepted Answer

Remove chocks, leave the parking brake valve open, put the vehicle in a forward gear, and attempt to drive forward to check if spring brakes drag.

Answer

Immediately call for a tow.

Answer

Drive the vehicle to a service center.

Question 10

What is the general rule for how much air pressure a full service brake application must deliver to all brake chambers?

Accepted Answer

Not less than 90% of the air reservoir pressure remaining with the brakes applied.

Answer

At least 50% of the reservoir pressure.

Answer

Exactly 100 psi.

Question 11

What is the primary function of the air storage tanks in an air brake system?

Accepted Answer

To hold compressed air, providing enough for several brake applications even if the compressor stops working.

Answer

To filter contaminants from the air.

Answer

To cool the compressed air.

Question 12

What is the recommended action if automatic air tanks are not equipped with electric heating devices in cold weather?

Accepted Answer

Daily air tank drainage is still needed to get rid of water and oil.

Answer

Fill them with antifreeze.

Answer

They do not require any special attention.

Question 13

What should a driver do if they hear the safety valve releasing air from the air brake system?

Accepted Answer

Have a mechanic address the fault.

Answer

Pump the brakes to stop the release.

Answer

Continue driving, it's a normal operation.

Question 14

What is the primary purpose of the "slack adjuster" in an S-cam brake system?

Accepted Answer

To adjust the distance the brake shoes travel to make contact with the brake drum.

Answer

To lubricate the brake components.

Answer

To regulate the air pressure to the brake chamber.

Question 15

What is the consequence of brake shoes and linings being oil or grease-soaked?

Accepted Answer

They are unsafe and need to be replaced.

Answer

They will perform better.

Answer

They will last longer.

Question 16

What is the primary reason for keeping both hands on the wheel when driving a large commercial vehicle?

Accepted Answer

To maintain proper control of the vehicle.

Answer

To operate multiple controls simultaneously.

Answer

To look more professional.

Question 17

What is the purpose of using reflective triangles when pulled off the road?

Accepted Answer

To alert approaching drivers to the vehicle's presence.

Answer

To decorate the vehicle.

Answer

To provide shade for the driver.

Question 18

What is the primary benefit of maintaining a safe speed for CMVs?

Accepted Answer

It reduces driving challenges related to acceleration, braking, and maneuverability.

Answer

It makes the vehicle appear more powerful.

Answer

It allows for faster delivery times.

Question 19

What should a driver do if they suspect pimp control or see a minor working in suspicious areas like truck stops or rest areas?

Accepted Answer

Call the National Hotline and report the tip.

Answer

Ignore it, it's not their responsibility.

Answer

Approach the individuals directly.

Question 20

What information should be included when reporting suspicious activity related to human trafficking?

Accepted Answer

Specific times, dates, addresses, and locations.

Answer

The driver's personal opinion about the situation.

Answer

Only the type of vehicle involved.

Question 21

What is a "Trafficking Red Flag" related to a person's demeanor?

Accepted Answer

Fear, anxiety, depression, submissive, tense, nervous.

Answer

Open and free communication.

Answer

Confidence and assertiveness.

Question 22

What is a "Trafficking Red Flag" related to identification documents?

Accepted Answer

Not in control of own identification documents (ID/passport).

Answer

Having multiple forms of ID.

Answer

Being in full control of their own ID/passport.

Question 23

What is the primary purpose of the "Alcohol and Drug Awareness Program (ADAP) Student Manual"?

Accepted Answer

To inform young people of the dangers involved in consuming alcohol or drugs while driving a vehicle and the importance of highway safety.

Answer

To provide comprehensive instructions for a Commercial Driver's License.

Answer

To help individuals qualify for a Georgia Driver's License.

Question 24

What is a key component of a pre-trip inspection related to the previous trip?

Accepted Answer

Reviewing the previous trip vehicle inspection report.

Answer

Ignoring previous issues.

Answer

Discarding the previous trip's report.

Question 25

What is the primary purpose of the "Commercial Driver's Study Guide Manual"?

Accepted Answer

To provide comprehensive instructions and guidance for a Commercial Driver's License (CDL).

Answer

To help individuals qualify for a Georgia Driver's License.

Answer

To give instructions for obtaining a motorcycle license.

Question 26

What is the purpose of the "Motorcycle Operators Manual"?

Accepted Answer

To give instructions for obtaining a motorcycle license.

Answer

To help individuals qualify for a Georgia Driver's License.

Answer

To provide comprehensive instructions and guidance for a Commercial Driver's License.

Question 27

What is the primary purpose of the "Driver's Manual" in a state's DDS manuals?

Accepted Answer

To help individuals qualify for a Georgia Driver's License and become a safer driver.

Answer

To provide comprehensive instructions and guidance for a Commercial Driver's License.

Answer

To give instructions for obtaining a motorcycle license.

Question 28

What is the significance of the fact that the FMCSA CDL Driver Manual states it does NOT provide information on all federal and state requirements?

Accepted Answer

It indicates that drivers may need to contact their state driver licensing authority for additional information.

Answer

It means the manual is incomplete and unreliable.

Answer

It suggests that federal regulations are not important.

Question 29

What is a key requirement for using a vehicle for the Vehicle Inspection Test?

Accepted Answer

Any vehicle that has components marked or labeled cannot be used.

Answer

It must have an automatic transmission.

Answer

It must be a new vehicle.

Question 30

What are the three types of general skills tested in the CDL skills tests?

Accepted Answer

Vehicle inspection, basic vehicle control, and on-road driving.

Answer

First aid, navigation, and customer service.

Answer

Parallel parking, lane changing, and speed control.

Question 31

What is the purpose of the DOT Mock Collection Instructional Video?

Accepted Answer

To provide instructions on how to conduct drug and alcohol collections.

Answer

To demonstrate proper vehicle maintenance.

Answer

To explain HOS regulations.

Question 32

What is the purpose of the DOT's 10 Steps to Collection Site Security and Integrity Video?

Accepted Answer

To provide guidance on maintaining the security and integrity of drug and alcohol collection sites.

Answer

To explain how to perform a pre-trip inspection.

Answer

To ensure proper vehicle loading procedures.

Question 33

What is the purpose of the "DOT's Am I Covered? Tool"?

Accepted Answer

To help individuals find out if they are subject to drug and alcohol testing regulations.

Answer

To check vehicle weight limits.

Answer

To determine if a driver needs a CDL.

Question 34

What is the purpose of the "Best Practices for DOT Random Drug and Alcohol Testing" guide?

Accepted Answer

To provide guidance on implementing effective random drug and alcohol testing programs.

Answer

To explain HOS regulations.

Answer

To outline vehicle inspection procedures.

Question 35

What is the purpose of the "ODAPC's Employee Handbook for DOT Drug and Alcohol Testing"?

Accepted Answer

To inform employees about DOT drug and alcohol testing regulations, rights, and responsibilities.

Answer

To explain how to obtain a CDL endorsement.

Answer

To provide information on vehicle maintenance.

Question 36

What is the significance of the "Moving Ahead for Progress in the 21st Century Act (MAP-21)" in relation to CDL regulations?

Accepted Answer

It introduced new requirements for CDL licensing and training standards.

Answer

It established new vehicle size limits.

Answer

It primarily focused on road construction.

Question 37

What is the purpose of the "DOT Direct Observation for All Return-to-Duty & Follow-Up Drug Testing Notice"?

Accepted Answer

To mandate direct observation for specific types of drug tests to ensure integrity.

Answer

To outline procedures for pre-employment drug testing.

Answer

To provide guidelines for random drug testing.

Question 38

What is the primary focus of the "Federal Drug-Free Workplace Programs Web site"?

Accepted Answer

To offer resources and information on federal drug-free workplace programs.

Answer

To detail state-specific drug testing laws.

Answer

To provide information on vehicle safety technologies.

Question 39

What is the purpose of the "Drug and Alcohol Testing Brochure for Drivers"?

Accepted Answer

To inform drivers about drug and alcohol testing rules, types of tests, and their rights/responsibilities.

Answer

To provide instructions on obtaining a CDL.

Answer

To explain vehicle weight limits.

Question 40

What is the purpose of the "Traffic Court Reference Manual" in a state's DDS manuals?

Accepted Answer

To provide information on conviction reporting and license consequences to GA courts handling Title 40 offenses.

Answer

To help individuals qualify for a Georgia Driver's License.

Answer

To give instructions for obtaining a motorcycle license.

South Carolina CDL Driving Rules Practice Test 3

Explanation