DGT Vehicle Operation & Maintenance 2 — Questions and Answers
Question 1: What does it mean when the oil pressure warning light illuminates while driving?
- Stop immediately and check oil level (Correct answer)
- The oil needs to be changed soon
- The engine oil is too hot
- The oil filter needs replacement
Correct answer: Stop immediately and check oil level
A lit oil pressure warning light indicates dangerously low oil pressure and you should stop the vehicle immediately to prevent engine damage.
Question 2: How often should you check your tire pressure?
- Only when a tire looks flat
- Once a month and before long trips (Correct answer)
- Every 10,000 miles
- Only during annual vehicle inspection
Correct answer: Once a month and before long trips
Tire pressure should be checked at least once a month and before long trips to ensure safety and fuel efficiency.
Question 3: What is the purpose of the vehicle's alternator?
- To start the engine
- To charge the battery while the engine runs (Correct answer)
- To regulate fuel flow
- To cool the engine
Correct answer: To charge the battery while the engine runs
The alternator generates electricity to charge the battery and power the vehicle's electrical systems while the engine is running.
Question 4: When should you replace your vehicle's air filter?
- Every 3,000 miles
- Every 15,000–30,000 miles or per manufacturer schedule (Correct answer)
- Only when the engine warning light comes on
- Every 5,000 miles without exception
Correct answer: Every 15,000–30,000 miles or per manufacturer schedule
Most manufacturers recommend replacing the engine air filter every 15,000–30,000 miles, though driving in dusty conditions may require more frequent changes.
Question 5: What should you do if your brakes feel soft or spongy when pressed?
- Pump the brakes repeatedly to restore pressure
- Check and top off brake fluid immediately
- Have the brake system inspected by a mechanic before driving further (Correct answer)
- This is normal in cold weather
Correct answer: Have the brake system inspected by a mechanic before driving further
Soft or spongy brakes indicate air in the brake lines or a fluid leak, which is a serious safety issue requiring immediate professional inspection.
Question 6: What does the temperature gauge on your dashboard measure?
- Outside air temperature
- Engine coolant temperature (Correct answer)
- Transmission fluid temperature
- Oil temperature
Correct answer: Engine coolant temperature
The temperature gauge measures engine coolant temperature, helping you monitor whether the engine is operating within the normal temperature range.
Question 7: Which fluid is used to assist in shifting gears in an automatic transmission?
- Engine oil
- Brake fluid
- Transmission fluid (Correct answer)
- Power steering fluid
Correct answer: Transmission fluid
Automatic transmission fluid (ATF) lubricates, cools, and enables hydraulic pressure needed for smooth automatic gear shifts.
DGT Vehicle Operation & Maintenance 2
What does it mean when the oil pressure warning light illuminates while driving?