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 should you do if you experience a tire blowout?

a) Brake hard

d) Turn sharply

c) Accelerate

b) Hold the steering wheel firmly and steer straight

2 / 112

What should you do if your vehicle hydroplanes?

d) Turn sharply

c) Take your foot off the accelerator

b) Accelerate

a) Brake hard

3 / 112

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

a) To control engine speed

b) To provide more traction on slippery surfaces

c) To increase fuel efficiency

d) To monitor tire pressure

4 / 112

How should you respond to aggressive drivers?

d) Speed up to pass them

a) Tailgate them

c) Ignore them and avoid confrontation

b) Make eye contact and gesture at them

5 / 112

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

a) To lubricate the brakes

b) To remove moisture and contaminants from the air

c) To increase air pressure

d) To monitor brake temperature

6 / 112

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

a) Checking tire pressure

b) Cleaning windows

d) Loading your cargo

c) Adjusting your seat

7 / 112

What is the function of a slack adjuster?

b) To adjust the brake shoes

d) To adjust the tires

a) To adjust the suspension

c) To adjust the steering

8 / 112

What is the primary cause of brake fade?

d) Overloading

a) Overuse of brakes

c) Low tire pressure

b) Cold weather

9 / 112

When should you downshift for a downgrade?

d) Downshifting is not necessary

b) Halfway down the hill

a) Before starting down the hill

c) After starting down the hill

10 / 112

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

c) 3

d) 4

b) 2

a) 1

11 / 112

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

c) 3 seconds

a) 1 second

d) 4 seconds

b) 2 seconds

12 / 112

When should you use low beams?

a) At all times

b) When driving through fog

c) On unlit highways

d) When following other vehicles

13 / 112

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

d) 4

c) 3

b) 2

a) 1

14 / 112

What should you do if your vehicle hydroplanes?

d) Turn sharply

c) Take your foot off the accelerator

a) Brake hard

b) Accelerate

15 / 112

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

d) All of the above

c) Pump the brakes

b) Shift to a lower gear

a) Use the parking brake

16 / 112

What is the purpose of reflective triangles?

b) To alert drivers of a stationary vehicle ahead

d) To warn of a steep grade ahead

a) To direct traffic

c) To mark construction zones

17 / 112

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

d) Pull over and wait

b) Make a U-turn

a) Back up carefully

c) Proceed to the next exit

18 / 112

When should you test the parking brake?

c) Before starting the engine

b) When parked on a hill

d) While reversing

a) While driving on the highway

19 / 112

What is the main cause of tire failure?

c) Speeding

a) Overloading

b) Underinflation

d) Sharp turns

20 / 112

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

a) Check lights

c) Review last inspection report

d) Check tire pressure

b) Check brakes

21 / 112

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

d) Honk your horn

a) Speed up

c) Increase your following distance

b) Brake suddenly

22 / 112

What should you do if your trailer starts to jackknife?

c) Release the brakes and straighten out

b) Turn in the direction you want to go

d) Brake hard

a) Accelerate

23 / 112

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

c) Avoid using brakes

a) Speed up to get through quickly

d) Turn off headlights

b) Drive through slowly

24 / 112

What is the primary cause of brake fade?

b) Cold weather

c) Low tire pressure

a) Overuse of brakes

d) Overloading

25 / 112

What is the correct way to use a fire extinguisher?

b) Aim at the base of the fire

c) Aim in the middle of the fire

a) Aim at the top of the fire

d) Aim above the fire

26 / 112

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

b) To maintain proper brake shoe clearance

c) To increase braking force

a) To adjust tire pressure

d) To monitor brake temperature

27 / 112

What should you do if your vehicle starts to skid?

c) Accelerate

b) Turn in the direction you want to go

d) Turn in the opposite direction

a) Brake hard

28 / 112

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

a) Checking tire pressure

d) Loading your cargo

b) Cleaning windows

c) Adjusting your seat

29 / 112

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

c) Brake pads

a) Tire pressure

b) Fluid levels and terminal connections

d) Transmission fluid

30 / 112

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

a) To increase air pressure

d) To alert the driver of low pressure

b) To release excess pressure to prevent system failure

c) To regulate the flow of air

31 / 112

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

c) 3 psi per minute

b) 2 psi per minute

d) 4 psi per minute

a) 1 psi per minute

32 / 112

When should you downshift for a downgrade?

b) Halfway down the hill

d) Downshifting is not necessary

c) After starting down the hill

a) Before starting down the hill

33 / 112

How often should you check your mirrors while driving?

d) Every 7 to 8 seconds

c) Every 15 seconds

a) Every 5 seconds

b) Every 10 seconds

34 / 112

How often should you check the air compressor drive belt?

a) Weekly

c) Daily

b) Monthly

d) Yearly

35 / 112

What should you do before driving if you are drowsy?

b) Take a nap

d) Turn on the radio

c) Open the windows

a) Drink coffee

36 / 112

What is the main cause of tire failure?

b) Underinflation

c) Speeding

a) Overloading

d) Sharp turns

37 / 112

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

c) 1 1/2 inches

a) 1/2 inch

d) 2 inches

b) 1 inch

38 / 112

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

a) On steep downgrades

c) During normal highway driving

d) In residential areas

b) On icy or slippery roads

39 / 112

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

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

b) To monitor air pressure

a) To increase braking force

d) To regulate the flow of air

40 / 112

What is the purpose of the service air line?

d) To provide power to the headlights

c) To charge the battery

b) To lubricate the engine

a) To supply air to the brakes

41 / 112

When should you use your hazard lights?

d) When approaching a railroad crossing

b) When reversing

a) When driving in a residential area

c) When parked on the side of the road

42 / 112

What is the purpose of a jake brake?

b) To assist with braking

a) To assist with acceleration

c) To stabilize the load

d) To improve fuel efficiency

43 / 112

How should you adjust your mirrors before starting a trip?

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

d) Have another driver adjust them for you

b) Adjust them to see the rear wheels

a) By trial and error while driving

44 / 112

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

b) Every 50 miles

c) Every 150 miles or every 3 hours

d) Only at the start of the trip

a) Every 10 miles

45 / 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

46 / 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

d) Use emergency brakes

a) Apply steady pressure

b) Pump the brakes

47 / 112

When should you downshift for a curve?

b) While in the curve

d) Downshifting is not necessary

c) After exiting the curve

a) Before entering the curve

48 / 112

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

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

c) Use the four-second rule

a) Use the one-second rule

b) Use the two-second rule

49 / 112

What should you do if you are being tailgated?

b) Brake suddenly

a) Speed up

c) Increase your following distance

d) Honk your horn

50 / 112

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

c) 15-20 seconds

d) 20-25 seconds

a) 5-10 seconds

b) 10-15 seconds

51 / 112

What should you do if your vehicle starts to skid?

d) Turn in the opposite direction

a) Brake hard

c) Accelerate

b) Turn in the direction you want to go

52 / 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

53 / 112

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

c) To ensure safety

a) To impress your boss

d) To save time

b) To save fuel

54 / 112

What should you do if your engine overheats?

d) Increase your speed to cool the engine

c) Pour cold water on the engine

a) Keep driving to the nearest service station

b) Stop and let the engine cool down

55 / 112

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

a) To release the parking brake

d) To cool the brakes

b) To signal the driver to stop

c) To start the compressor and increase air pressure

56 / 112

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

d) Yearly

a) Weekly

b) Monthly

c) Daily

57 / 112

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

a) 1/32 inch

d) 6/32 inch

c) 4/32 inch

b) 2/32 inch

58 / 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

59 / 112

What is the main cause of skids?

c) Over acceleration

b) Over braking

a) Oversteering

d) All of the above

60 / 112

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

d) To monitor tire pressure

c) To automatically steer the vehicle

a) To increase fuel efficiency

b) To prevent wheel lockup during hard braking

61 / 112

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

c) The side

b) The front

a) The rear

d) The roof

62 / 112

What does the air compressor governor control?

d) Headlights

a) Steering

b) Engine temperature

c) Air pressure

63 / 112

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

a) Apply steady pressure

d) Use emergency brakes

b) Pump the brakes

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

64 / 112

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

d) To stabilize the load

c) To couple the tractor and trailer

a) To steer the trailer

b) To lock the trailer brakes

65 / 112

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

a) 0.02%

c) 0.08%

b) 0.04%

d) 0.10%

66 / 112

Which of the following is an example of aggressive driving?

c) Yielding the right of way

a) Following too closely

d) Driving at the speed limit

b) Using turn signals

67 / 112

Which of the following is a sign of aggressive driving?

b) Following too closely

a) Yielding the right of way

c) Using turn signals

d) Driving at the speed limit

68 / 112

What should you do if your trailer starts to jackknife?

c) Release the brakes and straighten out

b) Turn in the direction you want to go

a) Accelerate

d) Brake hard

69 / 112

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

c) Gently apply the brakes while driving slowly

b) Accelerate to dry them

a) Apply steady pressure

d) Avoid using the brakes

70 / 112

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

c) To ensure safety

d) To save time

b) To save fuel

a) To impress your boss

71 / 112

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

a) 5-10 seconds

c) 15-20 seconds

d) 20-25 seconds

b) 10-15 seconds

72 / 112

What is the purpose of the service air line?

c) To charge the battery

b) To lubricate the engine

a) To supply air to the brakes

d) To provide power to the headlights

73 / 112

What is the purpose of a retarder?

b) To slow down the vehicle

d) To stabilize the load

a) To assist with steering

c) To improve fuel efficiency

74 / 112

What is the minimum safe following distance?

c) 3 seconds per 10 feet of vehicle length

a) 1 second per 10 feet of vehicle length

b) 2 seconds per 10 feet of vehicle length

d) 4 seconds per 10 feet of vehicle length

75 / 112

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

a) Warning triangles

d) Spare tire

b) First aid kit

c) Fire extinguisher

76 / 112

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

b) At a moderate speed

a) At a high speed

c) At a low speed

d) At a constant speed

77 / 112

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

c) Stop suddenly

d) Flash your headlights

a) Accelerate to pass it quickly

b) Change lanes and reduce speed

78 / 112

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

c) Yearly

a) Weekly

b) Monthly

d) Daily

79 / 112

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

c) Turn off the engine

b) Press the brake pedal

d) Apply the service brake

a) Pull the parking brake knob

80 / 112

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

c) Reducing speed

d) Increasing following distance

a) Using low beams

b) Using high beams

81 / 112

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

d) Use water to put out the fire

a) Keep driving until you find help

c) Open the hood to check the engine

b) Stop as quickly as possible in a safe place

82 / 112

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

a) Check lights

c) Review last inspection report

b) Check brakes

d) Check tire pressure

83 / 112

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

d) Check the air dryer for moisture

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

c) Inspect the air tanks for leaks

b) Engage the parking brake and listen for air leaks

84 / 112

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

c) Listen for grinding noises

d) Inspect the brake pads visually

a) Measure with a ruler

b) Check the brake temperature

85 / 112

What is the purpose of a pre-trip inspection?

d) To refuel the vehicle

b) To wash the vehicle

c) To load cargo

a) To check for any mechanical issues

86 / 112

What is the function of a governor on a truck?

c) To control the brakes

a) To control speed

b) To steer the vehicle

d) To manage the lights

87 / 112

What is the purpose of the trailer hand valve?

d) To steer the trailer

a) To control the air conditioning

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

c) To lock the trailer wheels

88 / 112

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

c) Get out and check your path

d) Rely on your passenger to guide you

a) Look directly out the back window

b) Use only your mirrors

89 / 112

How should you check the brake chambers for air leaks?

d) Inspect the brake pads

c) Measure the brake stroke

b) Check the temperature

a) Listen for hissing sounds

90 / 112

Which of the following should be avoided while driving?

d) Talking to a passenger

c) Drinking water

a) Texting

b) Listening to the radio

91 / 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

b) To provide vehicle speed

a) To warn of low oil pressure

92 / 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

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

c) Release the brakes and listen for air leaks

93 / 112

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

a) Apply the service brake

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

c) Increase engine speed

d) Check the brake pads

94 / 112

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

c) Open the hood to check the engine

a) Keep driving until you find help

d) Use water to put out the fire

b) Stop as quickly as possible in a safe place

95 / 112

What is the main cause of skids?

a) Oversteering

d) All of the above

b) Overbraking

c) Overacceleration

96 / 112

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

d) Inspect the brake pads visually

b) Listen for air leaks

c) Check the brake temperature

a) Measure the brake stroke

97 / 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?

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

a) By cooling the brake drums

d) By increasing air pressure to the brake chambers

b) By monitoring tire temperature

98 / 112

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

c) Stop suddenly

b) Change lanes and reduce speed

d) Flash your headlights

a) Accelerate to pass it quickly

99 / 112

What does the air compressor governor control?

d) Headlights

b) Engine temperature

c) Air pressure

a) Steering

100 / 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?

a) By cooling the brake drums

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

d) By monitoring brake pad wear

b) By increasing brake chamber stroke length

101 / 112

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

b) Pull the parking brake knob

a) Push the emergency brake button

c) Tap the brake pedal repeatedly

d) Use the foot brake pedal

102 / 112

What should you do if your trailer starts to jackknife?

a) Accelerate

b) Turn in the direction you want to go

d) Brake hard

c) Release the brakes and straighten out

103 / 112

What is the main reason for checking your mirrors regularly?

c) To check for police

d) To enjoy the view

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

a) To check your appearance

104 / 112

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

a) Weekly

c) Every 100 miles or 2 hours

b) Monthly

d) Only during a pre-trip inspection

105 / 112

When should you use your high beams?

c) On unlit highways

b) When there is heavy traffic

a) At all times

d) In foggy conditions

106 / 112

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

a) The rear

c) The side

b) The front

d) The roof

107 / 112

Which of the following is a sign of aggressive driving?

a) Yielding the right of way

c) Using turn signals

b) Following too closely

d) Driving at the speed limit

108 / 112

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

c) 45 mph

b) 35 mph

d) 55 mph

a) 25 mph

109 / 112

What is the minimum clearance for crossing railroad tracks?

d) 25 feet

a) 10 feet

b) 15 feet

c) 20 feet

110 / 112

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

c) To monitor brake temperature

d) To signal the driver of low pressure

b) To increase braking force

a) To regulate air pressure to the service brakes

111 / 112

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

a) 1

b) 2

d) 4

c) 3

112 / 112

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

a) Speed up to get through quickly

d) Turn off headlights

c) Avoid using brakes

b) Drive through slowly

Your score is

The average score is 16%

Kerm1t Logistics – OCDL Exam

Kerm1t Logistics – OCDL Exam