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CDL GENERAL KNOWLEDGE STUDY QUESTIONS & ANSWERS 100% CORRECT, Exams of Commercial Law

Ohlone CollegeCommercial Law

CDL GENERAL KNOWLEDGE STUDY QUESTIONS & ANSWERS 100% CORRECT 1. CDL general knowledge practice test with 100% accurate answers 2. Free CDL general knowledge study guide with guaranteed correct answers 3. Best CDL general knowledge exam prep questions and solutions 4. Comprehensive CDL general knowledge test questions and explanations 5. CDL general knowledge study materials with 100% pass rate 6. Most up-to-date CDL general knowledge test questions and answers 7. CDL general knowledge exam simulator with verified correct answers 8. Top-rated CDL general knowledge study questions for first-time test takers 9. CDL general knowledge test prep with expert-verified answers 10. Complete CDL general knowledge question bank with detailed explanations 11. CDL general knowledge study app with 100% accurate practice tests 12. Official CDL general knowledge test questions and answers 2023 13. CDL general knowledge study guide for guaranteed test success 14. CDL general knowledge exam secrets

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2024/2025

Available from 05/20/2025

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CDL GENERAL KNOWLEDGE STUDY QUESTIONS &
ANSWERS 100% CORRECT
1. CDL GENERAL KNOWLEDGE
1. What is the most important reason for doing a vehicle inspection?
ANS Road safety
2. 2. What things should you check during a trip?
ANS instruments, air pressure gauge, temp gauge, pressure gauge,
ammeter/voltmeter, mirrors, tires, cargo/ cargo covers, lights.
3. 3. Name some key steering system parts.
ANS steering wheel, tie rod, steering shaft, hydraulic fluid reservoir, gear box,
pitman arm, drag link, steering knuckle, spindle, steering arm, power steering
cylinder
4. 4. Name some suspension system defects.
ANS spring hangers that allow move- ment of axle from proper position, cracked or
broken spring hangers, missing or broken leaves in any leaf spring, leaking shock
absorbers, air suspension systems that are damaged and or leaking, any parts of
the suspension or frame that is cracked or broken
5. 5. What three kinds of emergency equipment must you have?
ANS fire extin- guisher, 3 reflective triangles, spare fuses
6. 6. What is the minimum tread depth for front tires?
ANS 4/32 inch
7. 7. For other tires?
ANS 2/32 inch
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CDL GENERAL KNOWLEDGE STUDY QUESTIONS &

ANSWERS 100% CORRECT

1. CDL GENERAL KNOWLEDGE

  1. What is the most important reason for doing a vehicle inspection? ANS Road safety
    1. What things should you check during a trip? ANS instruments, air pressure gauge, temp gauge, pressure gauge, ammeter/voltmeter, mirrors, tires, cargo/ cargo covers, lights.
    1. Name some key steering system parts. ANS steering wheel, tie rod, steering shaft, hydraulic fluid reservoir, gear box, pitman arm, drag link, steering knuckle, spindle, steering arm, power steering cylinder
    1. Name some suspension system defects. ANS spring hangers that allow move- ment of axle from proper position, cracked or broken spring hangers, missing or broken leaves in any leaf spring, leaking shock absorbers, air suspension systems that are damaged and or leaking, any parts of the suspension or frame that is cracked or broken
    1. What three kinds of emergency equipment must you have? ANS fire extin- guisher, 3 reflective triangles, spare fuses
    1. What is the minimum tread depth for front tires? ANS 4/32 inch
    1. For other tires? ANS 2/32 inch
    1. Name some things you should check on the front of your vehicle during the walk-around inspection. ANS front axle, steering system, windshield, lights and reflectors
    1. What should wheel bearing seals be checked for? ANS Leaks
    1. How many red reflective triangles should you carry? ANS 3
    1. How do you test hydraulic brakes for leaks? ANS pump the break pedal 3 times and then hold, the pedal should not move
    1. Can you bring the "vehicle inspection memory aide" with you to the test? ANS False
    1. Why put the starter switch key in your pocket during the pre-trip inspection? ANS For safety...somebody could move the truck while you're underneath it.
    1. Why should you back toward the driver's side? ANS Better visibility
    1. What is a pull-up? ANS A pull up refers to when your parallel parking after you back the truck up you "pull it up to straighten it up"
    1. What does "communicating" mean in safe driving? ANS Signaling your in- tentions
    1. Where should your reflectors be placed when stopped on a divided highway? ANS 10 feet 100 feet and 200 feet toward the approaching traffic
    1. What three things add up to total stopping distance? ANS perception dis- tance, reaction distance, braking distance
    1. If you go twice as fast, will your stopping distance increase by twice or four times? ANS Four times
    1. Empty trucks have the best braking. True or false? ANS False
    1. What is hydroplaning? ANS Tires water-skiing across the road
    1. What is "black ice?" ANS a thin layer of ice that you can see the road through
    1. How do you find out how many seconds of following distance space you have? ANS 1 second for every 10 feet of vehicle length under 40 mph, over 40 mph add a second per 10 feet
    1. If you are driving a 30-foot vehicle at 55 MPH, how many seconds of following distance should you allow? ANS 5
    1. You should decrease your following distance if somebody is following you too closely. True or false? ANS False
    1. If you swing wide to the left before turning right, another driver may try to pass you on the right. True or false? ANS True
    1. You should use low beams whenever you can. True or false? ANS False
    1. What should you do before you drive if you are drowsy? ANS Sleep
    1. What effects can wet brakes cause? How can you avoid these prob- lems? ANS Wet brakes will be less effective. Avoid by not driving through deep puddles, if possible. If not, you should slow down, place transmission in low gear, gently put on brakes, increase engine RPM and cross the water while keeping light pressure on brakes. When out of water maintain light pressure on brakes for a short distance to heat them and dry them.
    1. You should let air out of hot tires so the pressure goes back to normal? True or false? ANS False
    1. What are some advantages of going right instead of left around an obstacle? ANS There is usually no one in the shoulder of the road, as there could be someone passing on your left, or oncoming traffic to the left.
    1. What is an "escape ramp?" ANS A traffic device that enables vehicles that are having braking problems to safely stop. It is typically a long, sand or gravel-filled lane adjacent to a road with a steep grade, and is designed to accommodate large trucks. The deep gravel allows the truck's momentum to be dissipated in a controlled and relatively harmless way, allowing the operator to stop it safely.
    1. If a tire blows out, you should put the brakes on hard to stop quickly. True or false? ANS False
    1. What are some things to do at an accident scene to prevent another accident? ANS If your vehicle is involved, try to get it to the side of the road. If you're stopping to help, park away from accident. Put on your flashers. Set out reflective triangles to warn other traffic.
    1. Name two causes of tire fires. ANS Under-inflated tires and duals that touch
    1. What kinds of fires is a B C extinguisher not good for? ANS B ANSC is designed to work on electrical fires and burning liquids only
    1. When using your extinguisher, should you get as close as possible to the fire? ANS No, stay as far away as possible
    1. Name some causes of vehicle fires. ANS Spilled fuel, improper flare use, tires, electrical systems, fuel, cargo.
    1. Common medicines for colds can make you sleepy. True or false? ANS True
    1. What should you do if you do become sleepy while driving? ANS Stop at a safe place and sleep
    1. Coffee and a little fresh air will help a drinker sober up. True or false?- ANS False
    1. What is a hazardous materials placard? ANS placards are signs put on the outside of a vehicle that identify the hazard class of the cargo
    1. Why are placards used? ANS they are used to warn others of hazardous materials
  8. TRANSPORTING CARGO SAFELY
  9. For what three things related to cargo are drivers responsible? ANS Inspecting your cargo, Recognizing overloads and poorly balanced weight, Knowing your

69. 4. What must you check before transporting a sealed load?

ANS Check that you don't exceed gross weight and axle weight limits.

70. AIR BRAKES

  1. Why must air tanks be drained? ANS To remove any water or oil

71. 2. What is a supply pressure gauge used for?

ANS To tell you how much pressure is in the air tanks

72. 3. All vehicles with air brakes must have a low air pressure warning signal.

True or false? ANS True

73. 4. What are spring brakes?

ANS a heavy spring that will engage the brakes if all air is out of the brake system

74. 5. Front wheel brakes are good under all conditions. True or false?

ANS True

75. 1. What is a dual air brake system?

ANS Has two separate air brake systems which use a single set of brake controls.

76. 2. What are the slack adjusters?

ANS a slack adjuster is a lever arm connected to the brake chamber's push rod at the clevis assembly. it adjusts the brakes to make up for lining wear.

77. 3. How can you check slack adjusters?

ANS Pull hard in each slack adjuster you can reach. if it moves more than about 1 inch where the push rod attaches to it, it probably needs adjustment

78. 4. How can you test the low pressure warning signal?

ANS shut the engine off when you have enough pressure that the low pressure warning signal is not on. turn the electrical power on and step on and off the brake pedal to reduce the air pressure in the tank. the warning signal must come one before the pressure drops to less than 60psi

79. 5. What can you check to make sure the spring brakes come on automati-

cally? ANS Reduce the air pressure in the tank by fanning the brake peddle, the tractor protection valve and parking brake valve should close. this should cause the spring brake to come on

80. 6. What are the maximum leakage rates?

ANS less than 2psi in one minute in single vehicles, less than 3psi in one minute for combination vehicles. then apply 90 psi or more with the brake pedal, if the drop is more than 3psi for singles or 4psi for combo's the air loss rate is too much

81. 1. Why should you be in the proper gear before starting down a hill?

ANS so you don't have to wear your brakes out slowing down

82. 2. What factors can cause brakes to fade or fail?