1. Modern air brake systems combines three different systems. The service brakes, the parking brakes and the:
S-cam brakes.
Drum brakes.
Foot brakes.
Emergency brakes.
2. Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks?
After every working day.
After every four hours of service.
Once a week.
Every other week.
3. Why drain water from the compressed air tanks?
To keep from fouling the air compressor oil.
Water can freeze in cold weather and cause brake failure.
The low boiling point of water reduces braking power.
Water over cools the compressor.
4. Air brake equipped vehicles must have:
A supply pressure gauge.
An air use gauge.
At least two brake heaters.
A backup hydraulic system.
5. What can legally hold a parking or emergency brake in position for a truck, truck tractor or
bus?
Fluid pressure
Air pressure
Spring pressure
Any of the above
6. If air pressure does NOT build up to normal within the correct amount of time, then:
You should be ready to use the parking brake to help you stop.
The alcohol container may be low.
Your air pressure may drop to low, requiring an emergency stop.
7. Which of these is NOT the proper time to apply the parking brakes?
If you will only be stopped for less than an hour.
If you are going to test the parking brake.
If the brakes are very hot (such as coming down a steep hill).
8. Why should you be sure that the fifth wheel plate is greased as required?
To reduce heat and noise
To prevent steering problems
To ensure good electrical connections
9. Excessive use of the service brakes results in overheating, which can lead to:
Improper
adjustment of s-cam.
Increased contact between the brake drums and brake lining.
Expansion of the brake drums.
10. The proper method of braking when going down long and/or steep grades after selecting the
proper gear is to brake until your speed is about ____ miles per hour below your "safe speed" then release your brakes.
5
10
15
11. The tendency for long commercial vehicles to swing wide on turns is called:
Fishtailing.
Dovetailing.
Hydroplaning.
Offtracking.
12. Water is the best way to put out a fire when the fuel is:
Gasoline.
Grease.
Chemicals.
None of these.
13. Three things factor into how quickly you can come to a full stop; those are:
14. If you park along side the road at night, you must:
Turn on your four-way emergency flashers.
Keep your turn signals on all night.
Set up warning triangles within 10 minutes of pulling over.
Sound your horn every 20 minutes.
15. Whenever you drive at night, you should:
Make sure you are well rested.
Drink plenty of water.
Slow down.
Always drive with your high beams on.
16. The phrase gross combination vehicle weight is figured by adding together:
The load and the trailer only.
The trailer and the axle weight.
The trailer and the powered vehicle.
The cargo, the trailer, and the weight of the vehicle.
17. While driving, the driver should always be looking down the road:
18. Drivers should check the exhaust system regularly because:
Fumes can pollute the air.
To reduce heat and noise.
Sometimes-fatal fumes can come into the cab and make you sick.
A faulty system can cause your engine to seize up.
19. You can assume that posted overhead clearance signs are correct:
Except in certain bad weather conditions.
Sometimes, except when the road has just been paved.
Because they are checked regularly.
Never, because your cargo load may effect clearance.
20. When you park your vehicle, you should find a place that:
Does not require backing up as you leave.
Allows for 10 feet of space all around your rig.
Has no downward slope.
Is recommended by other truckers.
21. If you have a breakdown or emergency, you need to put reflective triangles out at:
100 feet, 100 feet and 200 feet facing approaching traffic.
20 feet, 100 feet and 200 feet facing approaching traffic.
10 feet, 100 feet and 200 feet facing approaching traffic.
25 feet, 100 feet and 250 feet facing approaching traffic.
22. In hazardous weather conditions, you should:
Maintain the posted speed limit.
Slow down and contact dispatch for further instructions.
Turn on your high beams so you can see more clearly.
Keep driving until you come to a truck stop.
23. When driving down a steep downhill grade, you should:
Shift into a higher gear than one you would use to go up the same grade.
Read your vehicle’s manual before attempting the grade.
Shift into the same gear that you would use to go up the same grade.
Shift into a lower gear than one you would use to go up the same grade.
24. Before beginning a trip, you should always:
Verify that the cargo is secured.
Check all lights and safety equipment.
Test your steering and brake systems.
All of the above.
25. You have to study and pass a test before you are granted a commercial drivers license:
If you carry more than 5 passengers.
If your CGVW is above 26,000 pounds.
If your cargo is livestock.
If you drive cross-country.
26. To help ensure passenger safety, bus drivers should always check to make sure the following are all in working order:
The emergency exit handles.
The railings and handholds.
The signaling devices on doors.
All the above.
27. Before you can take the driving portion to get your commercial drivers license, you will need to:
Make an appointment.
Test drive the same type of vehicle you will be driving commercially.
Conduct a pre-trip inspection with the examiner.
All the above.
28. The purpose of conducting the pre-trip inspection with an examiner is:
To make sure you know if a vehicle is safe to drive.
To make sure you know what to check before driving.
Both A and B.
To make obtaining a CDL more difficlut.
29. Unsecured cargo can be dangerous because:
During shifting it can harm you or damage the vehicle.
It will cost the company a lot of money if cargo gets damaged.
Your insurance rates may go up.
Shifting cargo causes down-surge forces.
30. The rules governing covering loads, securing cargo, where you can drive, and how much your load can weigh:
Are determined by the federal government.
Are determined by local government.
Are determined by local, state, and the federal government.
Are determined by state government.
31. The maximum weight that a tire can carry at a specific tire pressure is called:
Tire weight.
Max tire pressure.
Tire max weight.
Tire load.
32. Overloading a vehicle may have adverse effects on a vehicle’s:
Speed and braking control.
Steering and suspension.
Brakes over heating.
All the above.
33. The reason why cargo is required to be covered in many states is:
So the weather doesn’t damage the cargo.
So the cargo does not fall off the vehicle.
Both A and B.
So nobody knows what materials you are carrying.
34. You should get into the habit of inspecting your cargo:
Only at the beginning of a trip.
Only midway through a trip.
Cargo is only inspected by state inspectors.
None of the above.
35. If your vehicle is equipped with air brakes, you need to know:
The parts of the air brake system.
How to inspect and test the brake system.
What to do if there is a problem with brakes.
All the above.
