Kerm1t Logistics - OCDL Exam -

Test Format:

Number of Questions: 112 multiple-choice questions.
Topics Covered: The test includes a wide range of topics crucial for commercial drivers, including vehicle inspection, driving safely, cargo handling, air brakes, hazardous materials, and emergency procedures.

Key Areas:

Vehicle Inspection:
- Importance of pre-trip and post-trip inspections.
- Checking critical components such as tires, brakes, lights, and fluids.
Safe Driving Practices:
- Following distance and speed management.
- Handling various driving conditions (e.g., night driving, driving in fog).
- Managing space and visibility.
Cargo Handling:
- Proper loading and securing of cargo.
- Understanding weight limits and distribution.
- Handling hazardous materials safely.
Air Brakes:
- Function and operation of air brakes.
- Inspection and maintenance.
- Safe usage of air brakes.
Hazardous Materials:
- Identifying and handling hazardous materials.
- Emergency response and safety procedures.
- Understanding placards and labels.
Emergency Procedures:
- Responding to vehicle fires, tire blowouts, and brake failures.
- Procedures for handling skids and hydroplaning.
- First aid measures and public safety considerations.

Test Preparation Tips:

Study the CDL Manual: The test questions are based on the information provided in the official CDL manual. Thoroughly review each section.
Practice Regularly: Taking practice tests can help you become familiar with the test format and identify areas where you need further study.
Stay Informed: Keep up to date with any changes in regulations or best practices related to commercial driving.
Get Adequate Rest: Ensure you are well-rested before taking the test to maintain focus and concentration.

Good luck!

Time has expired!

Kerm1t Logistics - OCDL Exam

1 / 112

What is the purpose of the modulating control valve in an air brake system?

d) To signal the driver of low pressure

c) To monitor brake temperature

a) To regulate air pressure to the service brakes

b) To increase braking force

2 / 112

When should you downshift for a downgrade?

b) Halfway down the hill

a) Before starting down the hill

c) After starting down the hill

d) Downshifting is not necessary

3 / 112

Which of the following should be part of your pre-trip inspection?

b) Cleaning windows

c) Adjusting your seat

d) Loading your cargo

a) Checking tire pressure

4 / 112

What is the purpose of the air compressor governor in an air brake system?

b) To monitor air pressure

a) To increase braking force

c) To control when the air compressor cuts in and out

d) To regulate the flow of air

5 / 112

How should you check the brake lining thickness during a pre-trip inspection?

b) Check the brake temperature

d) Inspect the brake pads visually

c) Listen for grinding noises

a) Measure with a ruler

6 / 112

What is the best way to figure out how many seconds of following distance you have?

c) Use the four-second rule

a) Use the one-second rule

b) Use the two-second rule

d) Wait until the vehicle ahead passes a shadow, then count the seconds until you pass the same point

7 / 112

When should you downshift for a curve?

d) Downshifting is not necessary

b) While in the curve

a) Before entering the curve

c) After exiting the curve

8 / 112

What is the maximum allowable blood alcohol concentration (BAC) for commercial drivers?

b) 0.04%

a) 0.02%

c) 0.08%

d) 0.10%

9 / 112

What is the purpose of the emergency air line?

b) To lubricate the engine

d) To provide power to the headlights

c) To charge the battery

a) To apply the trailer brakes

10 / 112

What is the minimum number of tie-downs for a 10-foot load?

d) 4

c) 3

b) 2

a) 1

11 / 112

What is the correct way to use a fire extinguisher?

c) Aim in the middle of the fire

a) Aim at the top of the fire

b) Aim at the base of the fire

d) Aim above the fire

12 / 112

How often should you drain the air tanks in an air brake system?

a) Weekly

b) Monthly

c) Daily

d) Yearly

13 / 112

What is the proper way to use your brakes on a long downgrade?

a) Apply steady pressure

c) Apply brakes just hard enough to feel a definite slowdown

b) Pump the brakes

d) Use emergency brakes

14 / 112

What is the proper way to apply emergency brakes in a vehicle with air brakes?

d) Use the foot brake pedal

c) Tap the brake pedal repeatedly

a) Push the emergency brake button

b) Pull the parking brake knob

15 / 112

What is the proper way to apply the emergency brake on a vehicle with air brakes?

c) Turn off the engine

d) Apply the service brake

b) Press the brake pedal

a) Pull the parking brake knob

16 / 112

What should you do if your vehicle starts to skid?

a) Brake hard

b) Turn in the direction you want to go

c) Accelerate

d) Turn in the opposite direction

17 / 112

What should you do if you have to drive through standing water?

b) Drive through slowly

c) Avoid using brakes

d) Turn off headlights

a) Speed up to get through quickly

18 / 112

What is the first step in a pre-trip inspection?

a) Check lights

b) Check brakes

d) Check tire pressure

c) Review last inspection report

19 / 112

When should you test the parking brake?

b) When parked on a hill

c) Before starting the engine

d) While reversing

a) While driving on the highway

20 / 112

What is the function of the safety valve in an air brake system?

b) To release excess pressure to prevent system failure

c) To regulate the flow of air

a) To increase air pressure

d) To alert the driver of low pressure

21 / 112

What is the correct way to back up a large vehicle?

a) Look directly out the back window

b) Use only your mirrors

d) Rely on your passenger to guide you

c) Get out and check your path

22 / 112

What is the purpose of the fifth wheel on a tractor-trailer?

a) To steer the trailer

b) To lock the trailer brakes

d) To stabilize the load

c) To couple the tractor and trailer

23 / 112

What is the main reason for checking your mirrors regularly?

a) To check your appearance

d) To enjoy the view

c) To check for police

b) To ensure there are no vehicles in your blind spots

24 / 112

Which of the following should be avoided while driving?

c) Drinking water

d) Talking to a passenger

a) Texting

b) Listening to the radio

25 / 112

Which part of the trailer is most likely to swing out and hit other vehicles?

b) The front

a) The rear

c) The side

d) The roof

26 / 112

What should you do if you miss your exit on the highway?

c) Proceed to the next exit

b) Make a U-turn

a) Back up carefully

d) Pull over and wait

27 / 112

How should you enter a curve while driving a commercial vehicle?

d) At a constant speed

c) At a low speed

b) At a moderate speed

a) At a high speed

28 / 112

What is the maximum speed for driving in an urban area, unless otherwise posted?

b) 35 mph

d) 55 mph

c) 45 mph

a) 25 mph

29 / 112

Which of the following should be part of your pre-trip inspection?

d) Loading your cargo

b) Cleaning windows

c) Adjusting your seat

a) Checking tire pressure

30 / 112

What is the best way to figure out how many seconds of following distance you have?

c) Use the four-second rule

d) Wait until the vehicle ahead passes a shadow, then count the seconds until you pass the same point

b) Use the two-second rule

a) Use the one-second rule

31 / 112

Which of the following is a sign of aggressive driving?

c) Using turn signals

d) Driving at the speed limit

a) Yielding the right of way

b) Following too closely

32 / 112

What should you do if your brakes fail while driving a commercial vehicle?

c) Pump the brakes

d) All of the above

b) Shift to a lower gear

a) Use the parking brake

33 / 112

How do automatic traction control (ATC) systems in commercial vehicles enhance driving stability under adverse conditions, and what is their impact on braking performance?

d) By increasing air pressure to the brake chambers

c) By reducing engine power and applying brakes to individual wheels

a) By cooling the brake drums

b) By monitoring tire temperature

34 / 112

What is the purpose of a slack adjuster in an air brake system?

d) To monitor brake temperature

c) To increase braking force

a) To adjust tire pressure

b) To maintain proper brake shoe clearance

35 / 112

Which of the following is a sign of aggressive driving?

b) Following too closely

c) Using turn signals

a) Yielding the right of way

d) Driving at the speed limit

36 / 112

What should you do if your vehicle catches fire while driving?

c) Open the hood to check the engine

d) Use water to put out the fire

a) Keep driving until you find help

b) Stop as quickly as possible in a safe place

37 / 112

What is the purpose of the emergency air line?

c) To charge the battery

d) To provide power to the headlights

b) To lubricate the engine

a) To apply the trailer brakes

38 / 112

What is the function of a governor on a truck?

c) To control the brakes

b) To steer the vehicle

d) To manage the lights

a) To control speed

39 / 112

What is the primary cause of brake fade?

a) Overuse of brakes

b) Cold weather

d) Overloading

c) Low tire pressure

40 / 112

What is the most important reason for doing a vehicle inspection?

c) To ensure safety

b) To save fuel

d) To save time

a) To impress your boss

41 / 112

What is the primary cause of brake fade?

c) Low tire pressure

b) Cold weather

a) Overuse of brakes

d) Overloading

42 / 112

What should you do if you see a hazardous situation ahead?

d) Flash your headlights

a) Accelerate to pass it quickly

b) Change lanes and reduce speed

c) Stop suddenly

43 / 112

What should you do if your trailer starts to jackknife?

a) Accelerate

b) Turn in the direction you want to go

c) Release the brakes and straighten out

d) Brake hard

44 / 112

What is the purpose of a pre-trip inspection?

a) To check for any mechanical issues

c) To load cargo

d) To refuel the vehicle

b) To wash the vehicle

45 / 112

What is the minimum clearance for crossing railroad tracks?

b) 15 feet

d) 25 feet

c) 20 feet

a) 10 feet

46 / 112

How often should you check the air compressor drive belt?

a) Weekly

b) Monthly

d) Yearly

c) Daily

47 / 112

How do you perform a leakage rate test on an air brake system?

c) Inspect the air tanks for leaks

a) Apply the service brake, release it, and measure the air pressure drop

d) Check the air dryer for moisture

b) Engage the parking brake and listen for air leaks

48 / 112

What is the minimum number of tie-downs for a 20-foot load?

c) 3

a) 1

d) 4

b) 2

49 / 112

When driving a commercial vehicle, what is the recommended following distance?

a) 1 second

d) 4 seconds

b) 2 seconds

c) 3 seconds

50 / 112

What is the main cause of skids?

c) Overacceleration

a) Oversteering

b) Overbraking

d) All of the above

51 / 112

Which of the following is NOT a required emergency equipment for a commercial vehicle?

b) First aid kit

a) Warning triangles

d) Spare tire

c) Fire extinguisher

52 / 112

How should you test the parking brake on a vehicle with air brakes?

a) Apply the service brake

c) Increase engine speed

b) Engage the parking brake and try to move the vehicle

d) Check the brake pads

53 / 112

What is the maximum allowable air pressure drop in a combination vehicle with the brakes applied?

a) 1 psi per minute

c) 3 psi per minute

b) 2 psi per minute

d) 4 psi per minute

54 / 112

What is the purpose of reflective triangles?

b) To alert drivers of a stationary vehicle ahead

a) To direct traffic

d) To warn of a steep grade ahead

c) To mark construction zones

55 / 112

What is the function of the differential lock on a truck?

a) To control engine speed

c) To increase fuel efficiency

d) To monitor tire pressure

b) To provide more traction on slippery surfaces

56 / 112

What is the purpose of a tire pressure monitoring system (TPMS)?

d) To monitor engine temperature

c) To alert the driver when tire pressure is low

a) To warn of low oil pressure

b) To provide vehicle speed

57 / 112

Which of the following should you avoid while driving in fog?

c) Reducing speed

b) Using high beams

d) Increasing following distance

a) Using low beams

58 / 112

What should you check on a vehicle's battery during a pre-trip inspection?

d) Transmission fluid

a) Tire pressure

c) Brake pads

b) Fluid levels and terminal connections

59 / 112

Which part of the trailer is most likely to swing out and hit other vehicles?

c) The side

d) The roof

a) The rear

b) The front

60 / 112

What is the purpose of the anti-lock braking system (ABS)?

d) To monitor tire pressure

b) To prevent wheel lockup during hard braking

c) To automatically steer the vehicle

a) To increase fuel efficiency

61 / 112

When should you use low beams?

c) On unlit highways

b) When driving through fog

a) At all times

d) When following other vehicles

62 / 112

What should you do if you experience a tire blowout?

b) Hold the steering wheel firmly and steer straight

d) Turn sharply

a) Brake hard

c) Accelerate

63 / 112

What should you do if you see a hazardous situation ahead?

d) Flash your headlights

b) Change lanes and reduce speed

c) Stop suddenly

a) Accelerate to pass it quickly

64 / 112

What should you do if your vehicle starts to skid?

c) Accelerate

d) Turn in the opposite direction

a) Brake hard

b) Turn in the direction you want to go

65 / 112

What is the correct brake stroke for a standard air brake chamber?

c) 1 1/2 inches

a) 1/2 inch

b) 1 inch

d) 2 inches

66 / 112

How should you test the service brakes on a vehicle with air brakes?

b) Engage the parking brake and try to move the vehicle

d) Check the brake temperature

c) Release the brakes and listen for air leaks

a) Apply the brakes at a low speed and check for proper stopping

67 / 112

How should you check the automatic slack adjusters during a pre-trip inspection?

b) Listen for air leaks

a) Measure the brake stroke

d) Inspect the brake pads visually

c) Check the brake temperature

68 / 112

What is the purpose of the air dryer in an air brake system?

d) To monitor brake temperature

c) To increase air pressure

b) To remove moisture and contaminants from the air

a) To lubricate the brakes

69 / 112

When should you avoid using the retarder (engine brake)?

a) On steep downgrades

d) In residential areas

b) On icy or slippery roads

c) During normal highway driving

70 / 112

What is the proper way to use your brakes on a long downgrade?

c) Apply brakes just hard enough to feel a definite slowdown

b) Pump the brakes

a) Apply steady pressure

d) Use emergency brakes

71 / 112

What is the purpose of the trailer hand valve?

b) To control the trailer brakes independently of the tractor brakes

d) To steer the trailer

c) To lock the trailer wheels

a) To control the air conditioning

72 / 112

How should you check the brake chambers for air leaks?

d) Inspect the brake pads

b) Check the temperature

a) Listen for hissing sounds

c) Measure the brake stroke

73 / 112

What does the air compressor governor control?

a) Steering

d) Headlights

c) Air pressure

b) Engine temperature

74 / 112

What is the main cause of skids?

c) Over acceleration

d) All of the above

b) Over braking

a) Oversteering

75 / 112

How often should you check your mirrors while driving?

a) Every 5 seconds

c) Every 15 seconds

b) Every 10 seconds

d) Every 7 to 8 seconds

76 / 112

How should you adjust your mirrors before starting a trip?

b) Adjust them to see the rear wheels

c) Adjust them so you can see part of your truck and the road behind

d) Have another driver adjust them for you

a) By trial and error while driving

77 / 112

What should you do if your trailer starts to jackknife?

b) Turn in the direction you want to go

c) Release the brakes and straighten out

d) Brake hard

a) Accelerate

78 / 112

How far ahead should you look while driving a commercial vehicle?

c) 15-20 seconds

a) 5-10 seconds

d) 20-25 seconds

b) 10-15 seconds

79 / 112

Which of the following is an example of aggressive driving?

d) Driving at the speed limit

b) Using turn signals

c) Yielding the right of way

a) Following too closely

80 / 112

What is the function of the brake application (modulating) valve in a trailer’s air brake system, and how does it manage variable braking force?

d) By monitoring brake pad wear

b) By increasing brake chamber stroke length

a) By cooling the brake drums

c) By adjusting air pressure to match the load weight and road conditions

81 / 112

What is the purpose of the cut-in pressure in an air brake system?

b) To signal the driver to stop

a) To release the parking brake

d) To cool the brakes

c) To start the compressor and increase air pressure

82 / 112

What is the first step in a pre-trip inspection?

c) Review last inspection report

d) Check tire pressure

a) Check lights

b) Check brakes

83 / 112

What is the minimum tread depth for steer tires on a commercial vehicle?

b) 2/32 inch

d) 6/32 inch

c) 4/32 inch

a) 1/32 inch

84 / 112

When should you downshift for a downgrade?

a) Before starting down the hill

b) Halfway down the hill

d) Downshifting is not necessary

c) After starting down the hill

85 / 112

What should you do if you have to drive through standing water?

d) Turn off headlights

a) Speed up to get through quickly

c) Avoid using brakes

b) Drive through slowly

86 / 112

What is the purpose of the service air line?

d) To provide power to the headlights

b) To lubricate the engine

a) To supply air to the brakes

c) To charge the battery

87 / 112

What should you do if your brakes become wet while driving?

a) Apply steady pressure

c) Gently apply the brakes while driving slowly

d) Avoid using the brakes

b) Accelerate to dry them

88 / 112

What is the function of a slack adjuster?

d) To adjust the tires

b) To adjust the brake shoes

c) To adjust the steering

a) To adjust the suspension

89 / 112

What should you do if your vehicle hydroplanes?

b) Accelerate

d) Turn sharply

a) Brake hard

c) Take your foot off the accelerator

90 / 112

When should you use your high beams?

d) In foggy conditions

b) When there is heavy traffic

c) On unlit highways

a) At all times

91 / 112

When should you use your hazard lights?

b) When reversing

c) When parked on the side of the road

d) When approaching a railroad crossing

a) When driving in a residential area

92 / 112

What should you do if you are being tailgated?

b) Brake suddenly

d) Honk your horn

c) Increase your following distance

a) Speed up

93 / 112

How should you respond to aggressive drivers?

c) Ignore them and avoid confrontation

b) Make eye contact and gesture at them

a) Tailgate them

d) Speed up to pass them

94 / 112

What is the most important reason for doing a vehicle inspection?

a) To impress your boss

d) To save time

c) To ensure safety

b) To save fuel

95 / 112

What is the main cause of tire failure?

d) Sharp turns

b) Underinflation

a) Overloading

c) Speeding

96 / 112

What does the air compressor governor control?

c) Air pressure

a) Steering

d) Headlights

b) Engine temperature

97 / 112

How often should you inspect the slack adjusters on a vehicle with air brakes?

c) Yearly

b) Monthly

a) Weekly

d) Daily

98 / 112

What is the purpose of a retarder?

b) To slow down the vehicle

a) To assist with steering

d) To stabilize the load

c) To improve fuel efficiency

99 / 112

What should you do if your trailer starts to jackknife?

b) Turn in the direction you want to go

d) Brake hard

a) Accelerate

c) Release the brakes and straighten out

100 / 112

How often should you check your cargo while on the road?

c) Every 150 miles or every 3 hours

a) Every 10 miles

d) Only at the start of the trip

b) Every 50 miles

101 / 112

Which of the following should you do if you are being tailgated?

d) Honk your horn

c) Increase your following distance

b) Brake suddenly

a) Speed up

102 / 112

How far ahead should you look while driving a commercial vehicle?

a) 5-10 seconds

d) 20-25 seconds

b) 10-15 seconds

c) 15-20 seconds

103 / 112

What should you do if your engine overheats?

a) Keep driving to the nearest service station

c) Pour cold water on the engine

b) Stop and let the engine cool down

d) Increase your speed to cool the engine

104 / 112

What should you do before driving if you are drowsy?

d) Turn on the radio

c) Open the windows

a) Drink coffee

b) Take a nap

105 / 112

What should you do if your vehicle catches fire while driving?

b) Stop as quickly as possible in a safe place

c) Open the hood to check the engine

d) Use water to put out the fire

a) Keep driving until you find help

106 / 112

How often should you check the tires and brakes on your vehicle?

d) Only during a pre-trip inspection

c) Every 100 miles or 2 hours

b) Monthly

a) Weekly

107 / 112

What is the minimum safe following distance?

c) 3 seconds per 10 feet of vehicle length

b) 2 seconds per 10 feet of vehicle length

d) 4 seconds per 10 feet of vehicle length

a) 1 second per 10 feet of vehicle length

108 / 112

What should you do if your vehicle hydroplanes?

d) Turn sharply

b) Accelerate

c) Take your foot off the accelerator

a) Brake hard

109 / 112

What is the main cause of tire failure?

b) Underinflation

a) Overloading

c) Speeding

d) Sharp turns

110 / 112

What is the purpose of a jake brake?

c) To stabilize the load

b) To assist with braking

d) To improve fuel efficiency

a) To assist with acceleration

111 / 112

What is the minimum number of tie-downs for a 10-foot load?

a) 1

b) 2

d) 4

c) 3

112 / 112

What is the purpose of the service air line?

b) To lubricate the engine

a) To supply air to the brakes

d) To provide power to the headlights

c) To charge the battery

Your score is

The average score is 16%

Kerm1t Logistics – OCDL Exam

Kerm1t Logistics – OCDL Exam