CDL Vehicle Inspection Practice Test Part 4

1. During the engine compartment portion of a pre-trip inspection (engine off), the driver inspects the engine belts for proper condition. What is the maximum acceptable belt deflection (slack) when pressing on the belt midway between pulleys?

2. During the cab check portion of a pre-trip inspection, the driver must verify that all required emergency equipment is present in the commercial motor vehicle. Which combination of emergency equipment items is required for all CMVs operating on public highways?

3. During the cab check portion of a pre-trip inspection, the driver inspects the windshield, windows, and mirrors. What windshield condition would be a defect requiring repair before operation?

4. A driver is performing the air brake system inspection on a Class B straight truck with air brakes. With the engine running, the driver fans the brake pedal to reduce air pressure and observe when the low-pressure warning device activates. The warning light and buzzer activate at 55 PSI. Based on FMCSA requirements, what should the driver determine about this condition?

5. A driver is inspecting the air brake system air storage tanks during a pre-trip inspection. The driver opens the drain valve on a tank and observes that only a small amount of moisture drains out, followed by clear air. The driver then checks another tank and finds that the drain valve is stuck and cannot be opened. What should the driver determine and report about these tank drain valve conditions?

6. A driver is performing the trailer inspection portion of a pre-trip inspection on a Class A tractor-semitrailer that has been parked overnight. The driver examines the landing gear (trailer support legs) and observes that the landing gear crank handle is properly stored and secured. However, the driver notices that one of the landing gear legs has visible surface rust on the support leg tube and the support leg feet (pads) show uneven wear with one pad noticeably worn thinner than the other. What should the driver determine about these landing gear conditions?

7. A driver is inspecting the brake hoses and lines during the walk-around portion of a pre-trip inspection on a Class B straight truck with air brakes. The driver observes that a brake hose on the right rear axle shows the following characteristics: the hose has visible cracks on the outer covering, the hose is flexible and not brittle when pressed, and there are no visible air leaks when the brakes are applied. What should the driver determine about this brake hose condition?

8. A driver is performing the engine compartment portion of a Class A tractor-semitrailer pre-trip inspection with the engine off. Arrange the following engine compartment inspection steps in the correct sequence: (1) Check power steering fluid level, (2) Check engine oil level, (3) Inspect belts for condition and tension, (4) Check coolant level in radiator or overflow tank, (5) Inspect hoses for condition and connections, (6) Check windshield washer fluid level.

9. A driver completes a day of driving and performs the required post-trip inspection. The driver identifies a defect: the left rear brake light is not functioning (bulb burned out). The driver prepares a Driver Vehicle Inspection Report (DVIR) per 49 CFR Section 396.11. The motor carrier reviews the DVIR and notes that the vehicle will not be used until the brake light is repaired. The carrier signs the DVIR and schedules repair for the next morning. What additional requirement must the motor carrier satisfy regarding this DVIR before the vehicle is returned to service?

10. A driver conducts a pre-trip inspection on a Class A tractor-semitrailer and identifies the following conditions: (1) Both steer tires have tread depth of 5/32 inch, (2) Left drive axle dual tires have diameter difference of 1/2 inch, (3) Slack adjuster push rod travel on rear trailer axle measured at 1 inch exactly, (4) Fire extinguisher gauge shows “charged” but extinguisher was manufactured 3 years ago, (5) One reflective triangle case is cracked but triangle is intact and usable, (6) Air compressor builds from 85 PSI to 100 PSI in 55 seconds at engine idle. Based on CVSA Out-of-Service Criteria and FMCSA regulations, which determination is correct?