Pre-Trip Inspection Practice Questions
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- Fairly unobstructed
- Heavily tinted
- Free of obstructions or damage
- Have few cracks or holes
From The CDL Manual
Mirrors and Windshield:
Mirrors should be clean and adjusted properly from the inside.
Windshield should be clean with no illegal stickers, no obstructions or damage to the glass.
- 3 reflective triangles, three fuses, or 6 liquid burning flares
- 2 flashlights and a reflective vest
- A smoke detector
- 3 reflective triangles, six fuses, or 3 liquid burning flares
From The CDL Manual
Emergency Equipment:
- Check for spare electrical fuses, unless circuit breaker equipped vehicle.
- Check for three red reflective triangles, six fuses or three liquid burning flares.
- Check for a properly charged and rated fire extinguisher.
- Requires a special permit to operate
- Must not be driven
- Must be specifically pointed out to the examiner
- Cannot be driven at night
From The CDL Manual
Note: If the vehicle is not equipped with electrical fuses, you must mention this to the examiner.
- 10 degrees (2 inches on 20-inch wheel)
- 10 degrees (10 inches on 20-inch wheel)
- 6 inches
- 3 inches
From The CDL Manual
Steering Play:
Non-power steering: Check for excessive play by turning steering wheel back and forth. Play should not exceed 10 degrees (or about 2 inches on a 20-inch wheel).
Power steering: With the engine running, check for excessive play by turning the steering wheel back and forth. Play should not exceed 10 degrees (or about 2 inches on a 20-inch wheel) before front left wheel barely moves.
- Turn signals
- Four-way flashers
- High-beam headlights
- These things should all activate corresponding dash lights
From The CDL Manual
Test that dash indicators work when corresponding lights are turned on:
- Left turn signal.
- Right turn signal.
- Four-way emergency flashers.
- High-beam headlight.
- Anti-lock Braking System (ABS) indicator.
- Reflector tape, running lights, decorative lights, headlights
- All external reflectors and lights should be verified to be clean and functional
- It is up to your instructor to decide
- Taillights, brake lights, turn signals, running lights
From The CDL Manual
Check that all external lights and reflective equipment are clean and functional. Light and reflector checks include:
- Clearance lights (red on rear, amber elsewhere).
- Headlights (high and low beams).
- Taillights.
- Backing lights.
- Turn signals.
- Four-way flashers.
- Brake lights.
- Red reflectors (on rear) and amber reflectors (elsewhere).
- Reflector tape condition.
- Engage parking brake at normal operating speed
- Set parking brake, and pull forward aggresively
- Set parking brake, and pull forward gently
- Pull forward at 10 mph, then engage parking brake
From The CDL Manual
Parking Brake Check:
Pulling Unit: With the parking brake engaged (trailer brakes released on combination vehicles), check that the parking brake will hold vehicle by gently trying to pull forward with parking brake on.
Trailer (if applicable): With the parking brake released and the trailer parking brake engaged (combination vehicles only), check that the trailer parking brake will hold vehicle by gently trying to pull forward with the trailer parking brake on.
- For as long as you hold it
- For 10 seconds
- It should move
- For 5 seconds
From The CDL Manual
Hydraulic Brake Check (if equipped):
- Pump the brake pedal three times and then hold it down for five seconds. The brake pedal should not move (de press) during the five seconds.
- If equipped with a hydraulic brake reserve (back-up) system, with the key off, depress the brake pedal and listen for the sound of the reserve system electric motor.
- Check that the warning buzzer or light is off.
- Will result in automatic failure
- Will normally not be noticed
- Is acceptable when there are time constraints
- Will require permission of the instructor
From The CDL Manual
Air Brake Check (Air Brake Equipped Vehicles Only):
Failure to perform all areas of the air brake check will result in an automatic failure of the Pre-Trip inspection test. Air brake safety devices vary. However, this procedure is designed to see that any safety device operates correctly as air pressure drops from normal to a low air condition. For safety purposes, in areas where an incline is present, you will use wheel chocks during the air brake check.
- Something you can hear happening
- More than 3 lbs in one minute
- More than 4 lbs in one minute
- More than 2 lbs in one minute
From The CDL Manual
System Leak Check:
Shut off the engine, chock your wheels, (if necessary), release the tractor protection valve and parking brake (push in), fully apply the foot brake and hold it for one minute.
Check the air gauge to see if the air pressure drops more than 3 pounds in one minute (single vehicle) or 4 pounds in one minute (combination vehicle). After checking the brake with brake applied, release the foot brake and watch the gauges with brake unapplied for one minute.
Check to see if the air pressure drops more than 2 pounds in one minute (single vehicle) or 3 pounds in one minute (combination vehicle).
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