#1
Which of the following is a primary reason for conducting a pre-trip inspection of a combination vehicle?
To ensure the vehicle is fueled up
To verify the vehicle's weight distribution
To check for potential safety hazards or defects
To adjust the radio settings
#2
What should you do if you detect a leak during your pre-trip inspection?
Ignore it unless it's significant
Fix it as soon as possible
Continue driving and monitor it
Inform your supervisor after the trip
#3
What is the purpose of the kingpin in a combination vehicle?
To secure the trailer to the fifth wheel
To adjust the trailer height
To control the trailer brakes
To stabilize the trailer during turns
#4
What is the recommended way to test the trailer emergency brakes during a pre-trip inspection?
By pulling the hand valve or using the brake pedal
By accelerating quickly and then slamming on the brakes
By engaging the parking brake
By honking the horn
#5
What is the role of the fifth wheel in a combination vehicle?
To provide suspension for the trailer
To control the trailer brakes
To connect the tractor to the trailer
To adjust the trailer's height
#6
What should you do if you notice your trailer drifting to one side while driving?
Adjust the radio volume
Increase your speed to stabilize the trailer
Check the tire pressure
Check the weight distribution
#7
What is the purpose of the trailer air supply knob in a combination vehicle?
To adjust the trailer suspension
To control the trailer brakes
To inflate the trailer tires
To adjust the trailer air pressure
#8
When driving a combination vehicle, which technique should you use when turning?
Make sharp turns to navigate easily
Use your mirrors to monitor traffic behind you
Start your turn from the center of the intersection
Use the 'crack-the-whip' technique to straighten out the trailer
#9
What is the purpose of the trailer hand valve?
To control the trailer's emergency brakes
To adjust the trailer's air pressure
To engage the trailer's parking brakes
To release the trailer's brakes
#10
What should you do if you experience trailer swing during a turn?
Accelerate to straighten out the trailer
Brake hard to stabilize the vehicle
Turn the steering wheel further in the direction of the swing
Release the accelerator and steer gently in the opposite direction of the swing
#11
Why is it important to distribute weight evenly in a combination vehicle?
To make the vehicle easier to steer
To prevent axle overloading and ensure stability
To improve fuel efficiency
To decrease braking distance
#12
When should you use the trailer hand valve in combination with the foot brake?
To stop quickly in an emergency
To slow down on a downhill slope
To navigate sharp turns
To disengage the trailer brakes
#13
Why is it important to avoid sharp turns when driving a combination vehicle?
To prevent tire wear
To maintain control and stability
To save fuel
To reduce engine strain
#14
When should you inspect the air brakes on a combination vehicle?
Every 5,000 miles
Only if you notice a problem
Before each trip
Once a month
#15
When should you use the trailer hand valve?
To make sharp turns
To slow down without using the service brakes
To release the trailer brakes
To adjust the trailer air pressure
#16
What is the purpose of the glad hands on a combination vehicle?
To secure the trailer to the tractor
To connect the electrical system of the tractor to the trailer
To adjust the trailer's air pressure
To control the trailer's emergency brakes
#17
What is the purpose of the trailer height adjustment valve?
To adjust the trailer's suspension
To control the trailer brakes
To level the trailer with the tractor
To adjust the trailer's height during loading
#18
Why should you ensure proper weight distribution when loading a combination vehicle?
To improve fuel efficiency
To avoid tire wear
To prevent axle overloading and ensure stability
To reduce engine strain
#19
What is the primary function of the trailer height control valve?
To adjust the trailer's suspension
To control the trailer brakes
To level the trailer with the tractor
To adjust the trailer's height during loading