For a new CDL school-bus endorsement, what must an applicant do in addition to the school-bus knowledge test?
Correct answer: Qualify for P and pass the required school-bus driving test.
For the CDL school-bus endorsement, federal rules require passenger-endorsement qualification and a skills test in a school bus of the appropriate vehicle group. Passing S knowledge alone is not enough; training and other licensing requirements still apply.
Source: 49 CFR 383.123(a); official eCFR current through September 17, 2026; reviewed September 21, 2026. ↗
A child disappears beside your stopped bus. Which area needs attention?
Correct answer: The danger zones around every side of the bus.
Children can be hidden close to the front, sides or rear. The left side also exposes them to passing traffic; a single mirror view is not a complete check.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.1.1; printed 10-1; physical PDF page 139; reviewed September 21, 2026. ↗
You take over a school bus from a taller driver. What should happen before you operate it?
Correct answer: Check and adjust each mirror for your own seated view.
Mirror coverage depends on the driver's position. Check all mirrors before operation and have any inadequate view corrected.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.1.2; printed 10-1; physical PDF page 139; reviewed September 21, 2026. ↗
What should properly adjusted outside flat mirrors show on a school bus?
Correct answer: Bus sides, rear tires at ground level and traffic behind.
Flat mirrors help monitor side clearances and rear traffic. They do not remove the close-in blind spots in front of or behind the bus.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.1.3; printed 10-1; physical PDF page 139; reviewed September 21, 2026. ↗
A vehicle looks small in a school bus's convex mirror. What must the driver remember?
Correct answer: Its apparent size and distance can be distorted.
Convex mirrors widen the viewing area but distort apparent size and distance. Use them together with the other mirrors and direct observation.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.1.4; printed 10-2; physical PDF page 140; reviewed September 21, 2026. ↗
During a mirror check, which view belongs in the outside convex mirrors?
Correct answer: The bus sides and at least one adjacent lane on each side.
The handbook calls for side coverage up to the mirror mounts, the front of the rear tires touching the ground, and an adjacent lane on each side.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.1.4; printed 10-2; physical PDF page 140; reviewed September 21, 2026. ↗
Which mirror system helps reveal a child directly in front of the bus below normal direct sight?
Correct answer: The outside crossover mirrors.
Crossover mirrors cover the front bumper danger zone and areas near the front wheels and service door. They supplement direct vision rather than replacing the other mirrors.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.1.5; printed 10-2; physical PDF page 140; reviewed September 21, 2026. ↗
How should crossover-mirror coverage meet the area you can see directly ahead?
Correct answer: The mirror view and direct view should overlap.
Overlapping views help avoid an unseen gap in the front danger zone. Proper adjustment includes the front bumper area at ground level and the front tires.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.1.5; printed 10-2; physical PDF page 140; reviewed September 21, 2026. ↗
Can the overhead inside mirror replace exterior checks before you leave a student stop?
Correct answer: No; it primarily monitors the passenger compartment.
The interior mirror is mainly for observing students. Its limited rear view and blind spots do not replace the exterior mirror checks for traffic and children.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.1.6; printed 10-3; physical PDF page 141; reviewed September 21, 2026. ↗
A parent asks you to move tomorrow's bus stop to another driveway. What should you do?
Correct answer: Obtain written approval from the appropriate school-district official first.
The manual calls for written approval from the appropriate school-district official before changing a bus stop. A parent's request does not authorize the driver to change the approved route or stop.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.2.1; printed 10-3; physical PDF page 141; reviewed September 21, 2026. ↗
As you slow for a student stop, when should you check for children and traffic?
Correct answer: Before, during and after bringing the bus to a stop.
Approach cautiously while repeatedly scanning pedestrians, traffic and the mirrors. A situation can change while the bus is slowing or stopped.
Source: South Carolina Commercial Driver's License Manual, body version March 2025; Section 10.2.1; printed 10-3; physical PDF page 141; reviewed September 21, 2026. ↗
Your South Carolina school bus has activated its amber signals while preparing for a pupil stop. What does state law prohibit a motorist behind the bus from doing?
Correct answer: Overtaking the school bus while its amber signals are actuated.
South Carolina separately prohibits overtaking a school bus while its amber signals are actuated. This is distinct from the red-light stopping rule and its opposite-direction multi-lane exception.
Source: South Carolina Code of Laws, Section 56-5-2770(C); current official posted text reviewed September 21, 2026. ↗
