A 17-year-old has a regular Tennessee license and wants to apply for a CDL immediately. What age requirement prevents the application?
Correct answer: A CDL applicant must be at least 18.
Tennessee sets a minimum age of 18 for a CDL application. A regular license does not lower that age requirement.
Source: Tennessee Department of Safety and Homeland Security, Apply for a Commercial Driver License; reviewed September 14, 2026. ↗
A 20-year-old holds a Tennessee CDL and is offered an ordinary delivery run into Kentucky. What restriction matters?
Correct answer: The under-21 driver is restricted to operation within Tennessee.
Tennessee restricts CDL holders under 21 to driving within the state. A same-day return does not remove that restriction.
Source: Tennessee Department of Safety and Homeland Security, Apply for a Commercial Driver License; reviewed September 14, 2026. ↗
A non-exempt freight combination has a GCWR of 34,000 lb and a trailer GVWR of 12,000 lb. Which CDL class is needed for that combination?
Correct answer: Class A, because both combination and trailer thresholds are met.
The combination meets the 26,001-lb Class A threshold and its trailer exceeds 10,000 lb. Both conditions matter; check required endorsements and restrictions separately.
Source: Tennessee Department of Safety and Homeland Security, Commercial Driver License Classes — Class A; reviewed September 14, 2026. ↗
A non-exempt straight truck has a GVWR of 30,000 lb and tows an 8,000-lb-GVWR trailer. Which is the minimum appropriate CDL class for this configuration?
Correct answer: Class B.
A single vehicle rated at least 26,001 lb with a trailer rated no more than 10,000 lb fits Class B. A heavy truck towing a trailer does not automatically require Class A.
Source: Tennessee Department of Safety and Homeland Security, Commercial Driver License Classes — Class B; reviewed September 14, 2026. ↗
A non-exempt shuttle is rated at 20,000 lb, tows nothing and was designed for 16 people including the driver. Only six people are aboard. Which CDL class covers it?
Correct answer: Class C because its passenger design capacity meets the CDL threshold.
For this vehicle below the Class B weight threshold, its design for more than 15 people including the driver puts it in Class C. Today's smaller passenger count does not change that design capacity. Passenger endorsement requirements also apply.
Source: Tennessee Department of Safety and Homeland Security, Commercial Driver License Classes — Class C; Passenger (P); reviewed September 14, 2026. ↗
A Tennessee driver has a valid Class B CDL and wants to drive an ordinary Class D passenger car. Is a separate Class D license needed?
Correct answer: No; the valid CDL also covers ordinary Class D vehicles.
Tennessee says a valid Class A, B or C CDL also permits operation of Class D vehicles. This does not grant motorcycle privileges or remove restrictions on the driver's credential.
Source: Tennessee Department of Safety and Homeland Security, Commercial Driver License Classes — Class D note; reviewed September 14, 2026. ↗
A first-time applicant wants a Tennessee CDL learner's permit for an air-braked combination. Is passing just the general knowledge test enough for all the planned equipment?
Correct answer: No; the other necessary knowledge tests must also be passed.
The permit process requires general knowledge and the additional knowledge exams needed for the intended vehicle and endorsements. For this application, do not omit air-brake and combination knowledge preparation.
Source: Tennessee Department of Safety and Homeland Security, CDL Learner's Permit; reviewed September 14, 2026. ↗
A Tennessee applicant has passed the required CDL knowledge exams. Before completing the on-road skills portion, which other practical components must be passed?
Correct answer: A pre-trip vehicle inspection and basic vehicle control.
Tennessee identifies pre-trip vehicle inspection and basic vehicle control before the on-road skills portion. Written practice cannot substitute for demonstrating those vehicle skills.
Source: Tennessee Department of Safety and Homeland Security, Apply for a Commercial Driver License — skills tests; reviewed September 14, 2026. ↗
An ordinary first-time Class B applicant has no ELDT exemption and no qualifying pre-2022 permit. Which preparation is required in addition to studying practice questions?
Correct answer: Entry-Level Driver Training through a registered training provider.
A first Class B application is within ELDT's scope. Our quizzes are knowledge practice, not registered Entry-Level Driver Training or proof of its completion.
Source: Tennessee Department of Safety and Homeland Security, Entry-Level Driver Training — first Class A or B; reviewed September 14, 2026. ↗
A driver already has Class B and now applies to upgrade to Class A, with no ELDT exemption. Does the existing Class B alone remove the training requirement?
Correct answer: No; a Class B-to-A upgrade is specifically covered by ELDT.
Tennessee's ELDT guidance expressly includes upgrading Class B to Class A. Holding Class B is not itself an exemption.
Source: Tennessee Department of Safety and Homeland Security, Entry-Level Driver Training — Class B to Class A; reviewed September 14, 2026. ↗
A driver is applying for a first School Bus (S) endorsement and has no applicable ELDT exception. Does possessing a CDL by itself satisfy the endorsement training requirement?
Correct answer: No; the first S endorsement is one of the ELDT-covered applications.
ELDT covers first-time S, P and H endorsement applications as well as specified A/B applications. A CDL alone does not establish completion of the training required for a new S endorsement.
Source: Tennessee Department of Safety and Homeland Security, Entry-Level Driver Training — S, P and H endorsements; reviewed September 14, 2026. ↗
A driver obtained a Class B CDL before February 7, 2022 and is only renewing the same class, without adding an ELDT-covered endorsement. Does ELDT apply retroactively just because of that renewal?
Correct answer: No; the entry-level requirement is not retroactive for that existing class.
The ELDT requirement is not retroactive for an already-held class or endorsement. A later covered upgrade or first endorsement can create a separate requirement; this question includes neither.
Source: Tennessee Department of Safety and Homeland Security, Entry-Level Driver Training — non-retroactive requirements; reviewed September 14, 2026. ↗
A Tennessee CDL driver needs to add a Passenger (P) endorsement. Which testing combination is listed for that endorsement?
Correct answer: Both a knowledge test and a skills test.
Tennessee lists both knowledge and skills testing for the passenger endorsement. Other application, training and qualification requirements are separate from that testing combination.
Source: Tennessee Department of Safety and Homeland Security, Tests Required to add an Endorsement — Passenger; reviewed September 14, 2026. ↗
An otherwise qualified Class A driver wants to add the endorsement for double or triple trailers. Which endorsement and test type does Tennessee list?
Correct answer: T endorsement with a knowledge test.
T is the multiple-trailer endorsement, and its listed endorsement exam is a knowledge test. Having that endorsement does not authorize every trailer configuration or route.
Source: Tennessee Department of Safety and Homeland Security, Commercial Driver License Endorsements — Multiple-Trailer (T); Tests Required; reviewed September 14, 2026. ↗
An eligible farm-service employee proposes using a Tennessee Code 24 restricted CDL to drive a Class A combination. Does that restricted credential cover it?
Correct answer: No; this restricted CDL is limited to farm-service Class B and C vehicles.
The Code 24 farm-service credential described by Tennessee excludes Class A. Staying within its distance or time limits does not enlarge the vehicle classes it permits.
Source: Tennessee Department of Safety and Homeland Security, Code 24 Restricted CDL for Farm Vehicles; reviewed September 14, 2026. ↗
An operation requires both the tank-vehicle and hazardous-materials endorsements. Which Tennessee endorsement code combines those authorizations?
Correct answer: X.
X combines hazardous-materials and tanker authorization. The driver must still satisfy the applicable training, testing, security and operating requirements; knowing the letter does not qualify the driver.
Source: Tennessee Department of Safety and Homeland Security, Commercial Driver License Endorsements — Haz Mat & Tanker (X); reviewed September 14, 2026. ↗
