ELDT Vehicle Systems and Malfunctions 2 — Questions and Answers
Question 1: During a pre-trip inspection, you notice an oil leak forming a puddle under the engine. What should you do?
- Note it and drive to a shop
- Do not operate the vehicle until it is repaired (Correct answer)
- Add oil and continue the trip
- Wipe it up and monitor it later
Correct answer: Do not operate the vehicle until it is repaired
A leak that could affect safe operation must be corrected before the vehicle is driven.
Question 2: The low air pressure warning device on a truck with air brakes must activate at or before what pressure?
- 120 psi
- 100 psi
- 60 psi (Correct answer)
- 20 psi
Correct answer: 60 psi
The low air pressure warning must come on at 60 psi or higher to alert the driver in time.
Question 3: What does an ABS malfunction lamp staying lit while driving indicate?
- The service brakes have failed
- The ABS is not working but normal brakes still function (Correct answer)
- The parking brake is engaged
- The air compressor is overworking
Correct answer: The ABS is not working but normal brakes still function
An illuminated ABS lamp means anti-lock braking is disabled, but standard braking still works.
Question 4: A steering wheel that has excessive play (more than about 10 degrees) most likely indicates a problem with what system?
- The exhaust system
- The steering system (Correct answer)
- The cooling system
- The electrical system
Correct answer: The steering system
More than roughly 10 degrees of free play signals worn steering components that need repair.
Question 5: Why should you check the color and level of engine coolant during inspection?
- To detect fuel contamination
- To prevent engine overheating (Correct answer)
- To improve fuel economy
- To reduce tire wear
Correct answer: To prevent engine overheating
Proper coolant level and condition keep the engine from overheating.
Question 6: If your dash temperature gauge climbs into the red zone while driving, what is the safest response?
- Increase speed to cool the engine with airflow
- Turn off the engine gauges and continue
- Pull over safely and shut down to prevent damage (Correct answer)
- Open the hood immediately while driving
Correct answer: Pull over safely and shut down to prevent damage
An overheating engine should be stopped safely to avoid severe damage.
Question 7: A cracked or broken leaf spring found during inspection is considered what?
- A minor cosmetic issue
- An out-of-service defect (Correct answer)
- Normal wear to monitor
- A fuel efficiency concern
Correct answer: An out-of-service defect
Broken suspension components like leaf springs are out-of-service defects.
ELDT Vehicle Systems and Malfunctions 2
During a pre-trip inspection, you notice an oil leak forming a puddle under the engine.
What should you do?