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Indiana CDL DMV Knowledge Test Class B 2

Take 4 practice tests for CDL is the best way to prepare for your Indiana DMV exam is by taking our free practice tests. The following question are from real Indiana DMV practice test. More than 95% people pass a DMV exam when practice at DMV Practice Test.

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1. The ____ tells a driver how much pressure is in the air tanks.
Application pressure gauge
Air compressor governor
Supply pressure gauge
Drum brake

A vehicle that is equipped with air brakes must also be equipped with a supply pressure gauge. This gauge tells the driver how much air pressure is in each of the vehicle's air tanks.

2. A driver can maintain alertness by:
Not wearing sunglasses during the day.
Keeping the cab warm.
Eating heavy foods.
Having another person ride with them.

To maintain alertness while driving, strategies include wearing sunglasses to reduce eye strain; maintaining a cool temperature inside the cab; avoiding heavy foods; and traveling with someone else who can share the responsibilities of driving.

3. When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
Slack adjuster.
Brake drum.
Alcohol evaporator.

When pressing the brake pedal in a vehicle with S-cam brakes, air will enter the brake chambers. The added air pressure will push out the rods and move slack adjusters, twisting the brake camshafts.

4. When it is difficult to see, such as at dawn or dusk, what is the best way to make your vehicle more visible?
Use your high beam lights.
Use your low beam lights.
Use only your clearance lights.
Do not use any lights.

In conditions of poor visibility (such as at dawn, at dusk, in rain, or in snow), you should turn on your low beam headlights to make your vehicle easier to see. Do not use your high beams when driving near other vehicles.

5. If your coolant level is found to be low, you should:
Drain the radiator.
Add more coolant.
Add engine oil.
Tighten the belts.

When inspecting the engine compartment, you should check the oil level, coolant level, and windshield washer fluid level, among other things. In both cold and hot weather, it is important that the engine have enough coolant.

6. Windshield wiper blades should be:

When inspecting your vehicle, you should check the wiper blades for damage, stiff rubber, and proper securement. Clean the blades if they are dirty.

7. On newer vehicles, how do you put on the parking brake?
Move a lever to the right.
Push in the yellow, diamond-shaped knob.
Pull out the yellow, diamond-shaped knob.
Pull up on the steering column.

On newer vehicles with air brakes, the parking brake is controlled by a yellow, diamond-shaped knob. The knob is pulled out to set the brakes, and pushed in to release them.

8. Cargo on flatbed trailers should be:
Tied down.
Glued down.
Left loose.
Pushed to one side.

On flatbed trailers or trailers without sides, cargo must be tied down to keep it from shifting or falling off in transit.

9. Seat belts:
Should not be worn.
Are optional for those holding a CDL.
Are required, but only if a driver is transporting hazardous materials.
Are required to be used by all drivers.

You must wear a seat belt at all times while operating a CMV.

10. If a vehicle has a vehicle inspection report, the driver:
Should not look at the report and instead try to find any issues themselves.
Should take the vehicle to a mechanic.
Should review the report.
Should not conduct a pre-trip inspection and rely only on the report.

For the first step of a vehicle inspection, you should review the last inspection report on your vehicle, if there is one. The carrier should have repaired any problems noted on the report.

11. Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:
An extra set of brakes.
Voice-activated brakes.
Cruise control.
Anti-Lock Braking Systems (ABS).

Truck tractors with air brakes that were manufactured on or after March 1, 1997 are required to be equipped with Anti-Lock Braking Systems (ABS). ABS is required in any other type of vehicle with air brakes that was manufactured on or after March 1, 1998.

12. How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?
It stays about the same.
It increases slightly.
It doubles.
It quadruples.

Increasing your vehicle's speed will increase your vehicle's striking power and braking distance. Doubling your vehicle's speed from 20 to 40 mph will multiply its braking distance by four.

13. A pre-trip vehicle inspection:
Is not required if the driver regularly uses the vehicle.
Is not required for trips under 100 miles.
Is only to be performed by a mechanic.
Is required by law.

Drivers are required by state and federal law to inspect their vehicles before beginning to drive.

14. When traction is poor, a driver should accelerate slowly:
Because it is best to always accelerate very slowly.
So they do not lose control of their vehicle.
So the driver does not accelerate faster than the vehicle ahead.
To be the last vehicle through an intersection.

Speeding up too quickly on a road with poor traction could cause a driver to lose control of their vehicle. In conditions that cause poor traction, a driver should accelerate especially smoothly and gradually.

15. When inspecting your brakes, a slack adjuster should move ____ from where it is attached to the push rod.
At least three inches
More than two inches
Up to five inches
No more than one inch

Check each slack adjuster after setting wheel chocks and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.

16. Looking far ahead of your vehicle while driving is:
Discouraged, as there is little you can do about something far up the road.
Encouraged to help you identify hazards as early as possible.
Not allowed.
Only encouraged if you are transporting hazardous materials.

Good drivers look down the road at least 12 to 15 seconds ahead of their vehicles. This makes it possible to identify hazards early, when drivers are more likely to have time to respond appropriately.

17. Test the low pressure warning signal:
Once a month.
Once a week.
Twice a week.
Before every trip.

It is essential that your low pressure warning light function properly. After allowing the system to charge, you can test the warning signal by rapidly applying and releasing the brake pedal. This will release air from the braking system and the warning signal should come on when pressure drops to a dangerous level.

18. Headlights:
Are not usually necessary when driving at night.
Provide better light than the sun.
Should be on the high beam setting whenever possible.
Should always be on the high beam setting.

To improve visibility, you should use high beam headlights at night where it is safe and legal to do so. However, the glare from high beam lights can blind other drivers. You should dim your lights to their low beam setting when driving within 500 feet of an approaching vehicle.

19. Which of the following is not an example of a driving hazard?
An accident on the roadway
An open road
A police car assisting a motorist on the side of the road
An ice cream truck

Passing an accident scene can be hazardous because the people involved in the accident may not be watching traffic, and the scene itself may distract other passing drivers. Ice cream trucks can create hazardous conditions because they attract children who may not pay attention to nearby vehicles. Shoppers near the roadway are often paying attention to stores, not passing traffic.

20. The minimum tread depth of all major grooves on tires that are not on the front of a CMV should be a minimum of:
1/32 of an inch.
2/32 of an inch.
4/32 of an inch.
3/4 of an inch.

When inspecting your tires, verify that there is at least 4/32 of an inch of tread depth in every major groove on the front tires, and tread depth of at least 2/32 of an inch on the other tires. Tires on the same vehicle should all be the same size.

21. During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:
10 psi in a minute.
8 psi in a minute.
6 psi in a minute.
4 psi in a minute.

It is important to know the maximum air loss rate that is safe for your specific vehicle. A triple combination should have a leakage rate no higher than 6 psi in a minute during an applied leakage test.

22. If you are being tailgated, you should:
Drive on the shoulder.
Pull off the roadway.
Drive faster.
Allow the vehicle to pass.

If you are being tailgated, it is best to allow more room to open up in front of your vehicle. This will help you avoid the need for sudden stops, which could result in the tailgater rear-ending you, and will make it easier for the tailgater to pass. Speeding up may only make things more dangerous by prompting the other driver to continue tailgating you at a higher speed.

23. If you identify a distracted driver on the road, you should:
Follow their vehicle closely.
Try to get their attention.
Give them plenty of room.
Flash your lights at them.

If you encounter a distracted driver, make sure to give them plenty of room. Be very careful if you pass their vehicle because the driver may be unaware of your presence and drift into your lane.

24. If a tire fails, the driver should:
Keep one hand on the steering wheel and use their other hand to wave to other drivers.
Stomp on the brakes.
Not use the brakes.

If a tire fails, braking could cause a loss of control. Unless braking is necessary to avoid a hazard, you should stay off the brakes until your vehicle has slowed considerably. Only then should you brake very gently, pull off the road, and stop.

25. Which of the following is not an example of a distracted person that motorists should be worried about?
A person talking to another person in their vehicle
A child on the side of the road
A construction worker on the side of the road
A person sitting on a bench waiting for a bus

You should be cautious when you are near people who are not paying attention to the road. Be wary of drivers who are engaged in conversation with passengers, children near the road, and road workers.

26. When approaching a downgrade, how can you reduce the amount of braking that will be needed?
Switch to a higher gear.
Switch to a lower gear.
Switch to neutral.
Turn off the engine.

Always shift to a lower gear before starting down a hill. Doing this will help your vehicle maintain a safe speed without you needing to use the brakes too much.

27. If using a helper while backing a vehicle, where should they stand?
In front of the passenger side
In front of the driver side
On the wide of the truck
Near the back of the truck

If you use a helper while backing your vehicle, they should stand near the back of the vehicle in a place where they are visible to you. Before backing, work out a set of hand signals that both you and your helper understand. Agree on a signal for "stop."

28. Before driving a vehicle with a dual air brake system, you must wait for the air compressor to build a minimum of ____ in both the primary and secondary systems.
25 psi
50 psi
75 psi
100 psi

Before driving a vehicle with a dual air brake system, you should wait for the air compressor to build up at least 100 psi in both the primary and secondary systems.

29. What should you do if your vehicle gets stuck on railroad tracks?
Stay in the vehicle.
Get out of the vehicle and call for assistance.
Continue trying to remove the vehicle from the tracks.
Walk down the tracks to look for an oncoming train.

If your vehicle gets stuck on railroad tracks for any reason, you should immediately exit the vehicle and walk away from the tracks. Contact the proper emergency authorities.

30. When driving, a driver should:
Not be concerned with what is happening on the right side of their vehicle.
Be concerned with what is happening on all sides of their vehicle.
Not be concerned with what is happening behind their vehicle.
Not be concerned with what is happening in front of their vehicle.

It is essential for a CMV driver to be aware of what is happening on all sides of their vehicle.

31. If a roadway is covered by fog, it is best for you to:
Drive faster than usual.
Use your high beam headlights.
Turn off your headlights.
Avoid driving.

Driving in fog is always dangerous. If possible, you should always avoid driving under foggy conditions.

32. A commercial motor vehicle should:
Not be equipped with a fire extinguisher, unless transporting hazardous materials.
Not be equipped with a fire extinguisher, unless the vehicle will be traveling through remote areas.
Never be equipped with a fire extinguisher.
Always be equipped with at least one fire extinguisher.

Vehicles must be equipped with the appropriate emergency equipment. When inspecting a CMV, you should check for at least one fire extinguisher; spare electrical fuses, unless the vehicle is equipped with circuit breakers; and the appropriate warning devices to be used when the vehicle is parked.

33. Where can you find the tire load rating?
On the inside of the driver’s door
On the dashboard
On the side of each tire
Under the hood

A tire load rating is the maximum safe weight that can be carried by a tire at a specified pressure. This number is stated on the side of each tire.

34. When pulled off on the side of the road, a driver should:
Keep the driver’s side door open.
Turn on their emergency flashers.
Wave their arms.
Turn off all lights.

If you must stop on the side of the road, it is important that you turn on your emergency flashers as a warning to other drivers. This is especially important if you are stopped at night.

35. Which of the following is not a crime that would disqualify an applicant from a hazardous materials endorsement?
Immigration violations

There are a number of crimes that will disqualify a person from receiving a hazardous materials endorsement for seven years. Among these are kidnapping or hostage taking, smuggling, and immigration violations. More serious crimes, such as murder, will result in a lifetime disqualification.

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