Knowledge Test Class A - California Cdl

1 . When you double your speed from 20 to 40 mph, your vehicle's stopping distance is:

Doubled. Tripled. Quadrupled. Click Here Full Cheat Sheet

2 . Front wheel braking works:

Only on packed snow. Under all conditions. Only if the road is dry. Take a FREE Practice Test Now

3 . When driving a 50-foot truck at 50 mph, your minimum following distance should be:

Four seconds. Five seconds. Six seconds. Take a FREE Practice Test Now

4 . In cold weather, an alcohol evaporator should be checked and filled:

Once a week. Every day. Every hour. Take a FREE Practice Test Now

5 . What tells you how much pressure is in your vehicle's air tanks?

The supply pressure gauge The ABS malfunction lamp The tractor protection valve Click Here Full Cheat Sheet

6 . When adjusting your mirrors before a trip:

No part of your vehicle should be visible in any mirror. Part of your vehicle should be visible in the mirrors. More than half of each mirror should show the vehicle. Take a FREE Practice Test Now

7 . Anti-Lock Braking Systems (ABS):

Reduce a vehicle's normal braking capacity. Are in addition to other braking systems and do not reduce a vehicle's braking power. Are not effective on larger vehicles. Take a FREE Practice Test Now

8 . If the low pressure warning signal activates while you are driving, you should:

Continue driving normally. Exit the road and park as soon as safely possible. Stop where you are and park. Take a FREE Practice Test Now

9 . If you must drive in reverse, using driver's side backing:

Is always encouraged. Is discouraged. Is only recommended if it is raining. Click Here Full Cheat Sheet

10 . Be sure that your wheel bearing/seals are:

Not leaking. Shiny. Rusted. Take a FREE Practice Test Now

11 . If turning to avoid a hazard:

You should brake hard. You should not brake as it may cause the wheels to lock. You should turn very sharply. Take a FREE Practice Test Now

12 . What is brake lag?

The time required for the brakes to work after the brake pedal is pressed The distance between the brake pedal and the floor The amount of air pressure used to stop the vehicle Take a FREE Practice Test Now

13 . You may be an aggressive driver if you:

Expect delays on your drive. Slow down and maintain a reasonable following distance. Make hand gestures that could anger other drivers. Click Here Full Cheat Sheet

14 . If using spring brakes when hauling a heavy load, a complete stop will:

Be impossible. Take a long time. Take a short amount of time. Take a FREE Practice Test Now

15 . If exiting a bus, a driver must:

Never make contact with the handrail. Maintain contact with the handrail. Move quickly. Take a FREE Practice Test Now

16 . What are placards?

Signs placed on a vehicle to identify hazards in the cargo A type of tire used in snowy conditions A log kept inside the vehicle Take a FREE Practice Test Now

17 . Who is responsible for cargo that has been loaded onto a truck?

The person who loaded the truck The supervisor of the company The truck driver Click Here Full Cheat Sheet

18 . Which of the following is not a sign of tire failure?

A loud sound Vibration Smoother steering Take a FREE Practice Test Now

19 . Slow down and be extra careful:

When traveling in normal traffic. When driving on dry pavement. When approaching a work zone. Take a FREE Practice Test Now

20 . If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:

Thin. Properly tightened. Cracked. Take a FREE Practice Test Now

21 . How much distance will an air brake-equipped vehicle need to come to a complete stop if it is traveling at 55 mph under ideal driving conditions?

300 feet 100 feet 450 feet Click Here Full Cheat Sheet

22 . Operating a commercial motor vehicle with a minimum blood alcohol content (BAC) of ____ is illegal.

0.02 percent 0.04 percent 0.08 percent Take a FREE Practice Test Now

23 . Before starting down a hill, be sure to:

Accelerate. Switch into a high gear. Switch into a low gear. Take a FREE Practice Test Now

24 . In hot weather, spots on the pavement where tar is bleeding:

Are very slippery. Offer the same amount of traction as the rest of the roadway. Offer more traction than the rest of the roadway. Take a FREE Practice Test Now

25 . In cool weather, as the temperature begins to rise and ice begins to melt:

It is usually safe to drive. The road will become even more slippery. Traction will increase. Click Here Full Cheat Sheet

26 . The leakage rate for a single vehicle with air brakes should be no more than ____ in one minute during a static leakage test.

1 psi 2 psi 3 psi Take a FREE Practice Test Now

Study tip: Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet” 99.2% of people who use the cheat sheet pass the FIRST TIME Click Here Full Cheat Sheet

27 . When an S-cam turns inside a brake drum, the S-cam:

Presses the brake shoes against the inside of the brake drum. Presses the brake shoes against the brake linings. Presses the brake linings against the wheel axles. Take a FREE Practice Test Now

28 . To avoid a hazard, you:

Should always come to a complete stop. May need to swerve your vehicle out of the way. Should change lanes without looking. Take a FREE Practice Test Now

29 . On any upgrade, gravity will:

Speed your vehicle up. Slow your vehicle down. Not impact your speed. Click Here Full Cheat Sheet

30 . If there is a fire in your vehicle, you should not:

Park in an area away from buildings, trees, brush, and other vehicles. Pull into a service station. Notify emergency services of your problem and your location. Take a FREE Practice Test Now

31 . Which of the following is not a sign of fatigue?

Difficulty focusing, with frequent blinking Yawning repeatedly or rubbing eyes Staying in your lane Take a FREE Practice Test Now

32 . For a truck with three axles, what is the maximum speed limit?

45 mph 55 mph 65 mph Take a FREE Practice Test Now

33 . During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?

3 psi in one minute. 6 psi in one minute. 8 psi in one minute. Click Here Full Cheat Sheet

34 . Friction inside a brake drum is caused when the brake shoes and linings:

Push against each other. Separate from the axle. Push against the inside of the drum. Take a FREE Practice Test Now

35 . If involved in an accident, which of the following is not recommended?

Trying to move your vehicle to the side of the road Caring for the injured Driving away from the scene Take a FREE Practice Test Now

36 . When pulled over to the side of the road, you should:

Rely on your taillights to alert other motorists to your presence. Not worry about other motorists. Use your four-way emergency flashers to alert other motorists to your presence. Take a FREE Practice Test Now

37 . Rough acceleration:

Is a good way to stay awake on long trips. Is distracting. Can cause mechanical damage. Click Here Full Cheat Sheet

38 . Most heavy trucks with manual transmissions require ____ to change gears.

Single clutching Double clutching Triple clutching Take a FREE Practice Test Now

39 . A safety valve is set to open at ____ pounds per square inch (psi).

100 150 200 Take a FREE Practice Test Now

40 . As the driver of a truck carrying a load, you are responsible for all of the following, except:

Inspecting the cargo. Recognizing poorly balanced weight. Knowing the phone numbers of all fire departments along your intended route of travel. Take a FREE Practice Test Now

41 . Who may operate a vehicle that is transporting hazardous materials?

Any driver with a CDL A driver with a hazardous materials endorsement A driver with a minimum of 10 years of experience Click Here Full Cheat Sheet

42 . When taking the basic vehicle control skills test, failing to exit your vehicle properly during any exercise will result in:

Failure of only that exercise. An extra point against your final score. Automatic failure of the basic vehicle control skills test. Take a FREE Practice Test Now

43 . During an applied leakage test, what is the maximum leakage rate that is safe for a single vehicle with air brakes?

10 psi in one minute 5 psi in one minute 3 psi in one minute Take a FREE Practice Test Now

44 . Having weight loaded in a way that creates a high center of gravity:

Increases the likelihood of a rollover. Increases the likelihood that items will fall down. Increases the difficulty of unloading the cargo. Take a FREE Practice Test Now

45 . To warn drivers behind you that you will be slowing down, you should:

Turn on the right turn signal followed by the left turn signal. Tap your brake pedal a few times to illuminate your brake lights. Swerve from side to side to get their attention. Click Here Full Cheat Sheet

46 . A one-way check valve:

Drains the water and compressor oil from the air tanks. Prevents air from escaping if the air compressor has a leak. Activates the emergency brakes when there is a leak. Take a FREE Practice Test Now

47 . You may not consume alcohol within ____ of going on duty.

One hour Two hours Four hours Take a FREE Practice Test Now

48 . The ____ are activated by an electric switch that is triggered by the brake pedal.

Headlights Turn signals Brake lights Take a FREE Practice Test Now

49 . What do the two systems of a dual air brake system share?

Hoses An air compressor Air tanks Click Here Full Cheat Sheet

50 . When exiting a vehicle, a driver should:

Hop directly from their seat to the ground. Maintain at least one point of contact with their vehicle. Be turned to face their vehicle. Take a FREE Practice Test Now