Chapter 4

Question 1

Approximately how much better fuel economy can you achieve by using good driving techniques?

Answer 1

up to 30 percent

Question 2

What you consider when planning a fuel-efficient route?

Answer 2

1. Planning and prep for your trip
2. proper vehicle maintenance and inspections.
3. Using proper techniques to start your vehicle.
4. proper driving techniques
5. reducing idle time.

Question 3

How long should you let a diesel engine idle when you first start it?

Answer 3

3-5 mins

Question 4

Is it a good idea to leave the engine running when you’re not driving? (at a truck stop)

Answer 4

no, idling is bad

Question 5

What are some smart driving techniques that can also save fuel?
6 items

Answer 5

1. accelerate slowly
2. select the right gear
3. run the engine in the highest gear to keep low rpm.
4. use cruise control
5. reduce average speed
6. Use retarder properly.

Question 6

Name some of the items that you should check as part of a pre-trip enroute, or post-trip inspection that affect fuel efficiency

Answer 6

1. Ensure tires are inflated to recommendations
   (for every 10 p.si. under -inflated, one percent of fuel is
   wasted)
2. Ensure all fluid levels such as motor oil and coolant are at proper levels
3. Check guags
4. Check fo air leaks
   5.Check tire tread depth

Question 7

What are some of the aerodynamic features of new trucks and trailers that improve fuel efficiency
8 things

Answer 7

1. sloped hood with under-hood air cleaners
2. rounded bumpers
3. rounded fenders with aero headlights and rounded
   body corners
4. slanted and or rounded windshield
5. Recessed door hinges and handles and low-profile
   side mirrors
6. Integrated roof fairings and deflectors, fuel tank side fairings
7. hidden exhaust stacks
8. Trailer gap reducers