LOUISIANA CLASS D CHAUFFEURS 2026 STUDY GUIDE
QUESTIONS AND ANSWERS GUARANTEE A+
✔✔When the vehicle breaks down, one signal must be placed ____ behind the vehicle
and ____ forward of the vehicle. A third signal must be on the traffic side of the truck
____ to the front or rear - ✔✔100 feet, 100 feet, 10 feet
✔✔When towing another vehicle, the draw bar or other connection must of sufficient
strength to pull all towed weight and must not exceed ____ - ✔✔15 feet
✔✔A rear view mirror must reflect a view of the highway for a distance of ____ to the
rear, regardless of the load of the vehicle - ✔✔200 feet
✔✔Any motor vehicle shall not be driven when any of the required ____ or ____ is
obscured by the tailboard, by any part of the load, by dirt or otherwise - ✔✔Lamps,
reflectors
✔✔All trailers or semi-trailers with a gross vehicle weight rating of ____ or more must
be equipped with brakes adequate to stop and hold it. - ✔✔3,000 pounds
✔✔Drivers should use ____ as the principal means of controlling speed on long grades.
- ✔✔Engine compression
✔✔If your brakes should fail on a level road, you should ____ and use engine
compression to slow down - ✔✔Downshift
✔✔Air brake systems are three braking systems combined: the ____ brake system, the
____ brake system, and the ____ brake system - ✔✔Service, parking, emergency
✔✔____ brake system applies and releases the brakes when you use the brake pedal
during normal driving - ✔✔Service
✔✔____ brake system applies and releases the parking brakes when you use the
parking brake control - ✔✔Parking
✔✔____ brake system uses part of the service and parking brake's system to stop the
vehicle in the event of a brake system failure - ✔✔Emergency
✔✔Pumps air into the air storage tanks (reservoirs) - ✔✔Air compressor
✔✔Controls when the air compressor will pump air into the air storage tanks - ✔✔Air
compressor governor
, ✔✔Used to hold compressed air - ✔✔Air storage tanks
✔✔Operated by turning a quarter turn or by pulling a cable. You must drain the tanks
yourself at the end of each day of driving - ✔✔Manual air tank drain
✔✔Water and oil is automatically expelled. They may be equipped for manual
draining as well - ✔✔Automatic air tank drain
✔✔Protects the tank and the rest of the system from too much pressure. The valve is
usually set to open at 150 psi - ✔✔Safety valve
✔✔These gauges tell you how much pressure is in the air tanks - ✔✔Supply pressure
gauges
✔✔This gauge shows how much air pressure you are applying to the brakes -
✔✔Application pressure gauge
✔✔Comes on before the air pressure in the tanks falls below 60 psi - ✔✔Low air
pressure warning
✔✔Holds emergency and parking brakes back by mechanical force - ✔✔Spring brakes
✔✔Used to engage the parking brakes in newer vehicles with air brakes - ✔✔Diamond
shaped, yellow, pull-push control knob
✔✔Put on the brakes as hard as you can without locking the wheels (do not turn the
steering wheel while doing this) - ✔✔Controlled braking
✔✔ Maximum width for vehicles (Excluding Buses) - ✔✔8 feet
✔✔a) Press the brake pedal as hard as you can. b) Release the brakes when the
wheels lock up. c) As soon as the wheels start rolling, put on the brakes fully again -
✔✔Stab braking
✔✔A load will not project more than ____ beyond the width of the body - ✔✔6 inches
✔✔Time it takes for the air to flow through the lines to the brakes - ✔✔One half second
or more
✔✔Maximum width for buses - ✔✔8 feet 6 inches
✔✔If the low air pressure warning comes on, ____ - ✔✔Stop and safely park your
vehicle as soon as possible
QUESTIONS AND ANSWERS GUARANTEE A+
✔✔When the vehicle breaks down, one signal must be placed ____ behind the vehicle
and ____ forward of the vehicle. A third signal must be on the traffic side of the truck
____ to the front or rear - ✔✔100 feet, 100 feet, 10 feet
✔✔When towing another vehicle, the draw bar or other connection must of sufficient
strength to pull all towed weight and must not exceed ____ - ✔✔15 feet
✔✔A rear view mirror must reflect a view of the highway for a distance of ____ to the
rear, regardless of the load of the vehicle - ✔✔200 feet
✔✔Any motor vehicle shall not be driven when any of the required ____ or ____ is
obscured by the tailboard, by any part of the load, by dirt or otherwise - ✔✔Lamps,
reflectors
✔✔All trailers or semi-trailers with a gross vehicle weight rating of ____ or more must
be equipped with brakes adequate to stop and hold it. - ✔✔3,000 pounds
✔✔Drivers should use ____ as the principal means of controlling speed on long grades.
- ✔✔Engine compression
✔✔If your brakes should fail on a level road, you should ____ and use engine
compression to slow down - ✔✔Downshift
✔✔Air brake systems are three braking systems combined: the ____ brake system, the
____ brake system, and the ____ brake system - ✔✔Service, parking, emergency
✔✔____ brake system applies and releases the brakes when you use the brake pedal
during normal driving - ✔✔Service
✔✔____ brake system applies and releases the parking brakes when you use the
parking brake control - ✔✔Parking
✔✔____ brake system uses part of the service and parking brake's system to stop the
vehicle in the event of a brake system failure - ✔✔Emergency
✔✔Pumps air into the air storage tanks (reservoirs) - ✔✔Air compressor
✔✔Controls when the air compressor will pump air into the air storage tanks - ✔✔Air
compressor governor
, ✔✔Used to hold compressed air - ✔✔Air storage tanks
✔✔Operated by turning a quarter turn or by pulling a cable. You must drain the tanks
yourself at the end of each day of driving - ✔✔Manual air tank drain
✔✔Water and oil is automatically expelled. They may be equipped for manual
draining as well - ✔✔Automatic air tank drain
✔✔Protects the tank and the rest of the system from too much pressure. The valve is
usually set to open at 150 psi - ✔✔Safety valve
✔✔These gauges tell you how much pressure is in the air tanks - ✔✔Supply pressure
gauges
✔✔This gauge shows how much air pressure you are applying to the brakes -
✔✔Application pressure gauge
✔✔Comes on before the air pressure in the tanks falls below 60 psi - ✔✔Low air
pressure warning
✔✔Holds emergency and parking brakes back by mechanical force - ✔✔Spring brakes
✔✔Used to engage the parking brakes in newer vehicles with air brakes - ✔✔Diamond
shaped, yellow, pull-push control knob
✔✔Put on the brakes as hard as you can without locking the wheels (do not turn the
steering wheel while doing this) - ✔✔Controlled braking
✔✔ Maximum width for vehicles (Excluding Buses) - ✔✔8 feet
✔✔a) Press the brake pedal as hard as you can. b) Release the brakes when the
wheels lock up. c) As soon as the wheels start rolling, put on the brakes fully again -
✔✔Stab braking
✔✔A load will not project more than ____ beyond the width of the body - ✔✔6 inches
✔✔Time it takes for the air to flow through the lines to the brakes - ✔✔One half second
or more
✔✔Maximum width for buses - ✔✔8 feet 6 inches
✔✔If the low air pressure warning comes on, ____ - ✔✔Stop and safely park your
vehicle as soon as possible
