Inspection_and_Testing

Question 1

How do you test air pressure warning signal?

Answer 1

Reduce air pressure by fanning brakes and watch for warning at 60 psi

Question 2

How do you test air pressure buildup time?

Answer 2

Time how long to build from 85 to 100 psi (should be under 45 seconds)

Question 3

How do you check for air loss with brakes released?

Answer 3

Engine off, brakes released, pressure drop should not exceed 2 psi per minute

Question 4

What is maximum air loss with brakes applied?

Answer 4

3 psi per minute single vehicles, 4 psi per minute combination vehicles

Question 5

How do you test spring brake controls?

Answer 5

Push parking brake knob in, then pull it back out

Question 6

How do you test service brakes?

Answer 6

Apply firm pressure and check vehicle stops without pulling

Question 7

How do you test parking brake?

Answer 7

Set brake and try to move forward gently

Question 8

What should you check about air lines?

Answer 8

No cracks, kinks, or signs of rubbing and wear

Question 9

How do you inspect brake chambers?

Answer 9

Check for cracks, mounting, and proper push rod travel

Question 10

What should you look for in slack adjusters?

Answer 10

Proper mounting and adjustment, no excessive wear

Question 11

How do you check brake drums?

Answer 11

Look for cracks, excessive wear, or overheating signs

Question 12

What brake lining problems should you check for?

Answer 12

Thickness, contamination, cracks, or loose mounting

Question 13

How thin can brake linings be?

Answer 13

Not less than 1/4 inch at thinnest point

Question 14

What should you check about brake hoses?

Answer 14

No cuts, cracks, bulges, or signs of rubbing

Question 15

How do you test air compressor governor?

Answer 15

Let pressure build and ensure it cuts out around 125 psi

Question 16

What should happen when you release parking brake?

Answer 16

Air pressure gauge should show slight pressure drop

Question 17

How do you check safety valve operation?

Answer 17

Cannot be tested during normal inspection - requires special procedures

Question 18

What should you do if air pressure warning stays on?

Answer 18

Do not drive until problem is found and corrected

Question 19

How do you test trailer brake system?

Answer 19

Use trailer hand valve and check for proper response

Question 20

What indicates brake adjustment problems?

Answer 20

Excessive push rod travel or poor brake performance

Question 21

How do you check air dryer?

Answer 21

Look for proper mounting and operation during pressure buildup

Question 22

What should you inspect about air tank mounting?

Answer 22

Secure brackets and protection from road damage

Question 23

How do you check air pressure buildup rate?

Answer 23

Start with pressure below 85 psi and time buildup to 100 psi

Question 24

What should you do if pressure builds too slowly?

Answer 24

Have air compressor inspected and repaired

Question 25

How do you test for excessive air loss?

Answer 25

Apply brakes fully and check pressure drop over one minute

Question 26

What causes excessive air loss?

Answer 26

Leaks in lines, chambers, valves, or tank drains

Question 27

How do you locate air leaks?

Answer 27

Listen for hissing sounds and use soapy water on connections

Question 28

What should you check about brake chamber mounting?

Answer 28

Secure bolts and no cracks in mounting brackets

Question 29

How do you inspect push rod condition?

Answer 29

Check for damage, proper lubrication, and correct travel

Question 30

What indicates slack adjuster problems?

Answer 30

Excessive push rod travel or uneven brake application

Question 31

How do you check brake drum condition?

Answer 31

Look for scoring, cracks, or out-of-round condition

Question 32

What should brake linings look like?

Answer 32

Even thickness, no oil contamination, securely attached

Question 33

How do you test emergency brake system?

Answer 33

Reduce air pressure and ensure spring brakes apply

Question 34

What should you check about air system electrical connections?

Answer 34

Secure connections and no corrosion

Question 35

How often should air brake inspection be performed?

Answer 35

Daily during pre-trip inspection

Question 36

What tools might you need for air brake inspection?

Answer 36

Tire pressure gauge, flashlight, and basic hand tools

Question 37

What should you do if you find air brake problems?

Answer 37

Do not drive vehicle until qualified mechanic makes repairs

Question 38

How do you document air brake inspection?

Answer 38

Note any problems found on vehicle inspection report

Question 39

What is the most critical air brake inspection item?

Answer 39

Air pressure buildup and system leakage rates

Question 40

What should you remember about air brake testing?

Answer 40

Follow proper sequence and don't skip any steps

Question 41

How do you ensure accurate air brake testing?

Answer 41

Allow system to stabilize before taking measurements

Question 42

What makes air brake inspection different from hydraulic?

Answer 42

Must check air pressure, buildup time, and leakage rates

Question 43

What should you know about automatic slack adjusters?

Answer 43

Should maintain proper adjustment but still need regular inspection

Question 44

How do you handle air brake system malfunctions?

Answer 44

Stop safely immediately and have qualified person inspect

Question 45

What is the consequence of poor air brake maintenance?

Answer 45

Brake failure and serious accidents