VDOT

Question 1

How much play in a steering wheel is allowed

Answer 1

No more than 10° approximately 2 inches in a 20 inch steering wheel

Question 2

For airbrakes air pressure should build from 50 psi to 90 psi how fast

Answer 2

3 minutes

Question 3

Oil pressure at idle should read what

Answer 3

5-20 psi

Question 4

Oil pressure while operating should read what

Answer 4

35-75 psi

Question 5

drivers should look at least how many seconds ahead

Answer 5

12-15 seconds

Question 6

If stopped on or near one way or divided highways you should place 2 warning devices how far from the vehicle

Answer 6

10’
100’

Question 7

If you stop on a two-lane Road caring traffic in both directions or Undivided-highways You should place warning devices where

Answer 7

Within 10 feet of the front or rear corners of the vehicle and 100 feet behind in ahead of the vehicle

Question 8

total Stopping distance is the sum of what?

Answer 8

perception distance
reaction distance
braking distance

Question 9

Define perception distance

Answer 9

Distance vehicle travels under ideal conditions from Time eyes see a hazard until brain recognizes it

Question 10

Define reaction distance

Answer 10

Distance travel under ideal conditions before physically touching breaks in response to hazard seen

Question 11

Define braking distance

Answer 11

Distance vehicle travels and ideal conditions while breaking

Question 12

If you double your speed from 20 to 40 miles per an hour the impact power increases how many times greater

Answer 12

4x

Question 13

True or false empty trucks require greater stopping distances

Answer 13

True
less weight means less traction for the tires and brakes

Question 14

When driving on a slippery surfaces reduce speed by how much of a fraction

Answer 14

1/3

Question 15

When driving on icy surfaces produce speeds by how much of a fraction

Answer 15

1/2

Question 16

In regards to managing space, you need at least one second for each how many feet at speeds below 40 miles an hour

Answer 16

10’

Question 17

When using low beams, you can see ahead about how many feet

Answer 17

250

Question 18

When using high beams you can see ahead about how many feet

Answer 18

350-500’

Question 19

True or false air pressure increases when temperature increases

Answer 19

true

Question 20

At train crossings vehicles must stop no closer than how many feet

Answer 20

15’

Question 21

what are four Causes for Skidding

Answer 21

Over breaking
over steering
over acceleration
driving too fast

Question 22

When does the low air pressure warning signal come on

Answer 22

when air pressure in tank falls below 60 PSI

Question 23

When do emergency breaks come fully on

Answer 23

When air pressure drops to arrange of 20 to 40 psi

Question 24

Before driving a vehicle with dual air systems front and rear allow time for air compressor to build up a minimum of how much psi

Answer 24

100

Question 25

At what psi should air compressor kick on

Answer 25

100 psi

Question 26

At what psi should air compressor kick off

Answer 26

125 psi

Question 27

To test for air leakage while the engine is off an air system charged release the parking brake a loss rate how many psi in one minute should occur

Answer 27

Less than 3 psi per minute for single vehicles less than 4 psi per minute for combination vehicles

Question 28

When the engine is operating at RPM the pressure should bill from 85 to 100 PSI within how many seconds

Answer 28

45

Question 29

what factors contribute to total stopping distance for airbrake vehicles

Answer 29

Perception distance reaction distance brake lag distance braking distance

Question 30

While inspecting engine compartment belts how much play should be at the center of the belt

Answer 30

1/2” to 3/4”

Question 31

what are 3 types of vehicle inspections

Answer 31

vehicle inspection during trip after trip

Question 32

when do you do a after trip inspection

Answer 32

At the end of the trip day or tour of duty

Question 33

How much of a leaf spring must be missing before vehicle will be placed out of service

Answer 33

1/4

Question 34

Air pressure governor should cut out around what range

Answer 34

120-140 psi

Question 35

Oil pressure at idle should read what range

Answer 35

5-20 psi

Question 36

Oil pressure while operating should read between what ranges

Answer 36

35-75

Question 37

How to test parking brakes

Answer 37

Set parking brake place vehicle in low gear gently pull forward against brake

Question 38

How to test service brakes

Answer 38

Accelerate to 5 miles an hour press break notice pulling or unusual feel

Question 39

Safe operation of a vehicle requires skills and what four categories

Answer 39

Accelerating steering stopping packing

Question 40

When driving an automatic transmission downhill is important to use which range of gear to prevent the transmission from shifting up

Answer 40

low range

Question 41

define a hazard

Answer 41

any road conditions or users that is a possible danger

Question 42

with only —- hours of sleep, triples risk of an accident

Answer 42

6 hours

Question 43

Working more than 60 hours a week increases your risk of an accident by how much of a percent

Answer 43

40%

Question 44

What is an indication that you have lost your anti-lock braking system

Answer 44

Lamp light stays on dashboard after the bulb check

Question 45

Define over breaking

Answer 45

Breaking too hard and locking up the wheels causing a skid

Question 46

Define oversteering

Answer 46

Turning the wheels more sharply in the vehicle concern resulting in a skid

Question 47

Define over acceleration

Answer 47

Supplying too much power to the drive wheels causing them to spend

Question 48

What is the most common type of skid

Answer 48

Driving too fast rear wheels lose traction

Question 49

What are the steps and correcting a drive wheel braking skid

Answer 49

Stop breaking countersteer by turning the vehicle back on course

Question 50

What are the steps when in a front wheel skid

Answer 50

Let the vehicle slow down

Question 51

What is the purpose of the alcohol evaporator in the air brake system

Answer 51

alcohol may be added to the air system to reduce risk of ice buildup in the valves

Question 52

Define dual air brake system

Answer 52

Two separate air brake systems using a single set of brake controls each system has its own air tank hoses and lines one system typically operates rear axle the other the front

Question 53

Do you still have to check automatic slack adjusters for movement of more than 1 inch from where the pushrod attaches

Answer 53

Yes if there is more they need to be adjusted by certified mechanic

Question 54

Brake drums must not have a crack longer than ??? of the width of the friction area

Answer 54

1/2

Question 55

When testing air leak first turn off engine release the brake in time pressure drop for one minute how much 2 psi is permitted for single vehicles and 3 for a combination vehicles then apply foot to break and hold for one minute see if air pressure drops more than three psi for single and four psi for combination then continuously pump service brake until low pressure warning signal turns on around 60 psi continue fanning off the air pressure by stepping on an offbreak pedal to reduce tank pressure parking brake valve should pop out at 20 to 45 psi start engine pressure should build from 85 to 100 psi within 45 seconds on dual air systems to test parking break stop the vehicle put the break on and gently pull against it and a low gear to see if parking break holds To test service brakes wait for the normal air pressure release the parking brake and I move the vehicle forward slowly at 5 miles/ an hour apply service brakes and know any pulling or unusual feel delayed stopping action