TDC Practice Test 1 Questions and
Answers Latest Update Graded A+
What is the proper procedure for backing up a commercial vehicle?
✔✔ When backing up, always check mirrors, use a spotter if available, and move slowly while
constantly checking your surroundings.
Why is it important to check tire pressure regularly?
✔✔ Proper tire pressure ensures better fuel efficiency, improves handling, and reduces the risk
of a blowout.
What should you do if your truck begins to skid?
✔✔ If your truck begins to skid, ease off the accelerator, steer in the direction of the skid, and
avoid slamming the brakes.
How do you know when to shift gears in a commercial vehicle?
✔✔ Shift gears when the engine reaches the appropriate RPM range, as indicated by the
vehicle’s tachometer or based on engine sound.
1
, Why should you inspect your brake system regularly?
✔✔ Regular brake inspections ensure that the brakes are functioning correctly, preventing
accidents caused by brake failure.
What is the main cause of brake fade in commercial vehicles?
✔✔ Brake fade is mainly caused by overheating due to excessive or prolonged braking,
particularly on long downgrades.
What is the purpose of the fifth wheel on a truck?
✔✔ The fifth wheel connects the tractor to the trailer and allows the trailer to pivot smoothly
during turns.
How should you handle driving through construction zones?
✔✔ Slow down, follow all posted signs, stay alert for workers and equipment, and be prepared
for sudden changes in traffic flow.
What are the consequences of not distributing cargo weight evenly?
✔✔ Uneven cargo distribution can lead to poor handling, increased risk of rollover, and damage
to the vehicle’s suspension system.
2
Answers Latest Update Graded A+
What is the proper procedure for backing up a commercial vehicle?
✔✔ When backing up, always check mirrors, use a spotter if available, and move slowly while
constantly checking your surroundings.
Why is it important to check tire pressure regularly?
✔✔ Proper tire pressure ensures better fuel efficiency, improves handling, and reduces the risk
of a blowout.
What should you do if your truck begins to skid?
✔✔ If your truck begins to skid, ease off the accelerator, steer in the direction of the skid, and
avoid slamming the brakes.
How do you know when to shift gears in a commercial vehicle?
✔✔ Shift gears when the engine reaches the appropriate RPM range, as indicated by the
vehicle’s tachometer or based on engine sound.
1
, Why should you inspect your brake system regularly?
✔✔ Regular brake inspections ensure that the brakes are functioning correctly, preventing
accidents caused by brake failure.
What is the main cause of brake fade in commercial vehicles?
✔✔ Brake fade is mainly caused by overheating due to excessive or prolonged braking,
particularly on long downgrades.
What is the purpose of the fifth wheel on a truck?
✔✔ The fifth wheel connects the tractor to the trailer and allows the trailer to pivot smoothly
during turns.
How should you handle driving through construction zones?
✔✔ Slow down, follow all posted signs, stay alert for workers and equipment, and be prepared
for sudden changes in traffic flow.
What are the consequences of not distributing cargo weight evenly?
✔✔ Uneven cargo distribution can lead to poor handling, increased risk of rollover, and damage
to the vehicle’s suspension system.
2
