Michigan Commercial Driver License
Manual Exam Questions And Correct
Answers.
What is the most important reason for doing a vehicle inspection? - Answer Safety is the most
important reason you inspect your vehicle, safety for yourself and for other road users.
What things should you check during a trip? - Answer - Watch gauges for signs or trouble.
- Use your senses to check for problems (look, listen, smell, feel).
- Check critical items when you stop:
• Tires, wheels and rims.
• Brakes.
• Lights and reflectors.
• Brake and electrical connections to trailer.
• Trailer coupling devices.
• Cargo securement devices.
Name some key steering system parts. - Answer - Tie rod
- Steering wheel
- Steering shaft
- Power Steering cylinder
- Steering Arm
- Hydraulic fluid reservoir
- Gear box
- Pitman arm
- Drag link
- Steering knuckle
- Spindle
Name some suspension system defects. - Answer - Spring hangers that allow movement of
axle from proper position.
, - Torque rod or arm, u-bolts, spring hangers, or other axle positioning parts that are cracked,
damaged, or missing.
- Air suspension systems that are damaged and/ or leaking.
- Any loose, cracked, broken, or missing frame members.
What three kinds of emergency equipment must you have? - Answer - Fire extinguisher(s).
- Spare electrical fuses (unless equipped with circuit breakers).
- Warning devices for parked vehicles (i.e., three reflective warning triangles or 6 fuses or 3
liquid burning flares).
What is the minimum tread depth for front tires?
For other tires? - Answer You need at least 4/32-inch tread depth in every major grove on
front tires.
You need 2/32-inch on other tires.
Name some of the things you should check on the front of your vehicle during the walk around
inspection. - Answer - Condition of front axle.
- Condition of Steering system.
• No loose, worn, bent, damaged or missing parts.
• Must grab steering mechanism to test for looseness.
- Condition of windshield.
• Check did damage and clean if dirty.
• Check windshield wiper arms for proper spring tension.
• Check super blades for damage, "stuff" rubber, and securement.
- Lights and reflectors.
• Parking, clearance, and identification lights clean, operating, and proper color (amber at
front).
• Reflectors clean and proper color (amber at front).
• Right front turn signal light clean, operating, and proper color (amber or white on signals
facing forward).
What should wheel bearing seals be checked for? - Answer Wheel bearing/ seals not leaking.
Manual Exam Questions And Correct
Answers.
What is the most important reason for doing a vehicle inspection? - Answer Safety is the most
important reason you inspect your vehicle, safety for yourself and for other road users.
What things should you check during a trip? - Answer - Watch gauges for signs or trouble.
- Use your senses to check for problems (look, listen, smell, feel).
- Check critical items when you stop:
• Tires, wheels and rims.
• Brakes.
• Lights and reflectors.
• Brake and electrical connections to trailer.
• Trailer coupling devices.
• Cargo securement devices.
Name some key steering system parts. - Answer - Tie rod
- Steering wheel
- Steering shaft
- Power Steering cylinder
- Steering Arm
- Hydraulic fluid reservoir
- Gear box
- Pitman arm
- Drag link
- Steering knuckle
- Spindle
Name some suspension system defects. - Answer - Spring hangers that allow movement of
axle from proper position.
, - Torque rod or arm, u-bolts, spring hangers, or other axle positioning parts that are cracked,
damaged, or missing.
- Air suspension systems that are damaged and/ or leaking.
- Any loose, cracked, broken, or missing frame members.
What three kinds of emergency equipment must you have? - Answer - Fire extinguisher(s).
- Spare electrical fuses (unless equipped with circuit breakers).
- Warning devices for parked vehicles (i.e., three reflective warning triangles or 6 fuses or 3
liquid burning flares).
What is the minimum tread depth for front tires?
For other tires? - Answer You need at least 4/32-inch tread depth in every major grove on
front tires.
You need 2/32-inch on other tires.
Name some of the things you should check on the front of your vehicle during the walk around
inspection. - Answer - Condition of front axle.
- Condition of Steering system.
• No loose, worn, bent, damaged or missing parts.
• Must grab steering mechanism to test for looseness.
- Condition of windshield.
• Check did damage and clean if dirty.
• Check windshield wiper arms for proper spring tension.
• Check super blades for damage, "stuff" rubber, and securement.
- Lights and reflectors.
• Parking, clearance, and identification lights clean, operating, and proper color (amber at
front).
• Reflectors clean and proper color (amber at front).
• Right front turn signal light clean, operating, and proper color (amber or white on signals
facing forward).
What should wheel bearing seals be checked for? - Answer Wheel bearing/ seals not leaking.
