Term
| What is perception distance? |
|
Definition
| the distance that a vehicle travels in the time your eyes see a hazard untill your brain recognizes it. at 55mph you will travel 60ft in 3/4 a second. |
|
|
Term
| What is reaction distance? |
|
Definition
| the distance that a vehicle will travel in the time your brain takes to move your foot from the accelerator to the brake. at 55mph you will travel 60ft in 3/4 a second |
|
|
Term
|
Definition
| the time it takes for an air system to feed air to the brakes and will add an additional 32ft to the total stopping distance. |
|
|
Term
| What is braking distance? |
|
Definition
| the distance it takes to stop the vehicle once the brakes have been applied. at 55mph and with good traction a heavy vehicle can stop in about 170ft in 4 1/2 seconds |
|
|
Term
| What is total stopping distance? |
|
Definition
| the total distance and time it takes from preception to be completely stopped. at 55mph w an air brake system would be 60+60+32+170=322ft. 290ft with other then air brake system |
|
|
Term
| When you double your speed, it takes __ times the distance to stop. |
|
Definition
| 4 times as long every time you double your speed |
|
|
Term
| True or False? A truck with en empty trailer can stop in a shorter distance then if it was full? |
|
Definition
| false, because an empty trailer has less traction and less breaking traction then a full trailer |
|
|
Term
| On a road with snow, by how much should you reduce your speed? |
|
Definition
|
|
Term
| What should you be careful of when driving up on a large shady area on the road? |
|
Definition
| ice may still be present when other open areas have melted |
|
|
Term
| In cold weather and driving over bridges what should you be careful of? |
|
Definition
| Bridges will freeze and ice over before the ground will |
|
|
Term
| What is the easiest way to check for ice in a swift vehicle? |
|
Definition
| instead of feeling the mirror, feel the mounting bars to check for ice |
|
|
Term
| If you do not adjust your speed before a curve, what two things could happen? |
|
Definition
| 1.going to fast around a curve can cause loss of traction and you will skid off the road 2.your vehicle can roll even at posted speeds if they center of gravity is high |
|
|
Term
| If you do not adjust your speed before a curve, what two things could happen? |
|
Definition
| 1.going to fast around a curve can cause loss of traction and you will skid off the road 2.your vehicle can roll even at posted speeds if they center of gravity is high |
|
|
Term
| True or False? When in heavy traffic, it is safer to drive a little slower then the flow of traffic. |
|
Definition
| false, driving with the speed is safer |
|
|
Term
| What factors should you consider when selecting a speed on down hill grades? |
|
Definition
| a.total weight of the vehicle and cargo b.length of the grade c.steepness of the grade d.road conditions e.weather |
|
|
Term
| What is the principal way of controlling speed on a downhill grade? |
|
Definition
|
|
Term
| What are the two main things to look for ahead of your vehicle? |
|
Definition
| traffic and road conditions |
|
|
Term
| What dose "communicating" mean in safe driving? |
|
Definition
| using your blinkers, high and low beams, and flashes when appropriate when needed |
|
|
