ELDT Ch 18 Identification and Diagnosis of Malfunctions

The lubrication system lubricates, cools, and cleans the:

• exhaust

• drive train.

• engine.

• all of the above.

The _______ is a series of connected mechanical parts which take the power generated by the engine and applies it to the tractor's drive wheels.

• clutch

• drive train

• kingpin

• all of the above

A defect in the braking system can interfere with a vehicle's ability to:

• steer properly.

• accelerate.

• slow down or stop.

• Shift into gear.

This system is what connects the tractor and trailer.

• Transmission system

• Coupling system

• Kingpin system

• Suspension system

When looking over the suspension system, you need to check for cracked, loose, or:

• broken spring hangers.

• damaged torque rods.

• damaged U-bolts.

• all of the above.

If your exhaust temperature is too high, what can get damaged?

• Engine

• Aftercooler

• Turbocharger

• Both A and C

When checking the coupling system, you need to:

• check the fifth wheel for cracks, breaks, security, and grease.

• check the kingpin for excessive cracks, bending, or wear.

• check the differential for loose wire connections.

• A & B

The suspension system allows the axles to move up and down in response to ground changes without seriously affecting the load. _______ allows the stress of road shocks to be distributed evenly throughout the frame.

• Driving at 55 mph

• Securing the suspension system at points spread throughout the frame

• Securing the suspension points directly above each set of wheels

• A & B

To keep vehicle systems in good operating condition:

• pay attention to your senses; sights, sounds, smells, and/or the feel of the vehicle can indicate a potential problem.

• report vehicle defects and deficiencies that you cannot fix to your company.

• make sure you only schedule maintenance work when there's a problem with your vehicle.

• A & B

As part of an oil change, the condition of the ______ should be assessed. This item can help prolong the life of the engine by removing contaminants as oil passes through it.

• filter

• dipstick

• oil

• cap