TEXAS COMMERCIAL RULES (CDL
KNOWLEDGE TEST) WITH COMPLETE
SOLUTIONS
The color of clearance lamps on the front of a vehicle must be
a. White
b. Amber
c. Green
d. Red - ANSWER-Amber
The load on a truck may not extend over the rear of vehicle more than
a. 65 feet
b. 40feet
c. 25 feet
d. 50 feet - ANSWER-b. 40 feet
All buses, taxis's, and other vehicles hauling passengers for hire or lease must carry a
chemical type fire extinguisher of at least
a. one pint capacity
b. two quart capacity
c. one quart capacity
d. one gallon capacity - ANSWER-c. one quart capacity
The greatest height ordinarily allowed by State law for vehicle including its load is
A. 12 feet
B. 12 feet, 6 inches
C. 13 feet, 6 inches
d. 14 feet - ANSWER-d. 14 feet
When backing a large truck you should
a. Depend only on your rearview mirror
b. Sound horn to clear way and back very slowly
c. Have someone guide you
d. Look straight ahead so you can back straight - ANSWER-c. Have someone guide you
Every trailer must have how many reflections on the rear?
a. Two
b. None
c. One
d. Three - ANSWER-a. Two
, When turning right with a long vehicle or combination truck-trailer, if it is impossible to
stay in the proper lane, you should
A. Approach the corner 12 feet from the curb or right edge of roadway, then
turn into the right-hand lane
B. Approach the corner about 4 feet from the curb or right edge of the roadway, then if
necessary complete turn in center of street entered.
C. Permit rear wheels to run over curb if no obstruction is there.
D. Approach the corner in center of street then turn into right-hand lane - ANSWER-B.
Approach the corner about 4 feet from the curb or right edge of the roadway, then if
necessary complete turn in center of street entered.
Turn signal indicators are required on all motor vehicles manufactured after the model
year - ANSWER-1959
No Combination of vehicles other than a truck tractor-trailer combination may exceed
a. 65 feet
b. 40 feet
c. 25 feet
d. 50 feet - ANSWER-a. 65 feet
When one truck is following another truck or vehicle, it may keep far enough back to
allow how many vehicles to enter safely between them?
A. Two vehicles
B. three vehicles
C. four vehicles
D. one vehicle - ANSWER-D. one vehicle
The greatest weight allowed by state law for any vehicle including the load is
a. 36,420
b. 48,000
c. 80,000
d. 60,000 - ANSWER-c. 80,000
A slow moving vehicle emblem must be displayed only by
a. All commercial vehicles
b. Delivery trucks which occasionally drive under 25 mph
c. All road machinery driving under 25 mph
d. Vehicles designed to be operated at speeds of 25 mph or less - ANSWER-d.
Vehicles designed to be operated at speeds of 25 mph or less
Which of the following vehicles are not required to have mud flaps?
A. Semi-trailers
B. Vehicles operated interstate
C. Pole trailers
D. Vehicles hauling livestock - ANSWER-C. Pole trailers
KNOWLEDGE TEST) WITH COMPLETE
SOLUTIONS
The color of clearance lamps on the front of a vehicle must be
a. White
b. Amber
c. Green
d. Red - ANSWER-Amber
The load on a truck may not extend over the rear of vehicle more than
a. 65 feet
b. 40feet
c. 25 feet
d. 50 feet - ANSWER-b. 40 feet
All buses, taxis's, and other vehicles hauling passengers for hire or lease must carry a
chemical type fire extinguisher of at least
a. one pint capacity
b. two quart capacity
c. one quart capacity
d. one gallon capacity - ANSWER-c. one quart capacity
The greatest height ordinarily allowed by State law for vehicle including its load is
A. 12 feet
B. 12 feet, 6 inches
C. 13 feet, 6 inches
d. 14 feet - ANSWER-d. 14 feet
When backing a large truck you should
a. Depend only on your rearview mirror
b. Sound horn to clear way and back very slowly
c. Have someone guide you
d. Look straight ahead so you can back straight - ANSWER-c. Have someone guide you
Every trailer must have how many reflections on the rear?
a. Two
b. None
c. One
d. Three - ANSWER-a. Two
, When turning right with a long vehicle or combination truck-trailer, if it is impossible to
stay in the proper lane, you should
A. Approach the corner 12 feet from the curb or right edge of roadway, then
turn into the right-hand lane
B. Approach the corner about 4 feet from the curb or right edge of the roadway, then if
necessary complete turn in center of street entered.
C. Permit rear wheels to run over curb if no obstruction is there.
D. Approach the corner in center of street then turn into right-hand lane - ANSWER-B.
Approach the corner about 4 feet from the curb or right edge of the roadway, then if
necessary complete turn in center of street entered.
Turn signal indicators are required on all motor vehicles manufactured after the model
year - ANSWER-1959
No Combination of vehicles other than a truck tractor-trailer combination may exceed
a. 65 feet
b. 40 feet
c. 25 feet
d. 50 feet - ANSWER-a. 65 feet
When one truck is following another truck or vehicle, it may keep far enough back to
allow how many vehicles to enter safely between them?
A. Two vehicles
B. three vehicles
C. four vehicles
D. one vehicle - ANSWER-D. one vehicle
The greatest weight allowed by state law for any vehicle including the load is
a. 36,420
b. 48,000
c. 80,000
d. 60,000 - ANSWER-c. 80,000
A slow moving vehicle emblem must be displayed only by
a. All commercial vehicles
b. Delivery trucks which occasionally drive under 25 mph
c. All road machinery driving under 25 mph
d. Vehicles designed to be operated at speeds of 25 mph or less - ANSWER-d.
Vehicles designed to be operated at speeds of 25 mph or less
Which of the following vehicles are not required to have mud flaps?
A. Semi-trailers
B. Vehicles operated interstate
C. Pole trailers
D. Vehicles hauling livestock - ANSWER-C. Pole trailers
