NS Air Brake Test study guide
NS Air Brake Test · Work through your exam, one topic at a time.
The NS Air Brake Test is the written and practical qualification used by Norfolk Southern to confirm that train service employees can inspect, test, and operate freight air brakes and apply train handling rules safely. It is intended for conductors, brakemen, engineers, and yard personnel whose duties include building trains, performing brake tests, or handling trains on the road. The NS Air Brake Test study guide has 6 sections and about 1,951 words.
01Air Brake System Components and Operation
The exam checks whether you can identify the major freight air brake components and explain how a brake pipe pressure change actually sets and releases the brakes, not just the names. Main reservoir and compressor : store and supply compressed air; the feed valve regulates brake pipe pressure in release.
417 words, about 2 min02Initial Terminal Brake Tests (Class I / Class II / Class III)
A Class I brake test is the initial terminal test. It is the most complete: 100% of cars inspected, brake pipe leakage test, brake application and release test, and inspection of piston travel and brake rigging.
363 words, about 2 min03Brake Pipe Leakage and Pressure Retention Tests
Charge the brake pipe to 90 psi, cut out the automatic brake valve, and observe the brake pipe gauge for 60 seconds. Leakage must not exceed 5 psi per minute on a freight train.
303 words, about 2 min04Train Handling and Brake Application Techniques
Use the automatic brake for train brakes and the independent for locomotive brakes. Make a minimum service reduction , typically 6–8 psi per the rulebook, rather than a heavy reduction.
287 words, about 1 min05Defect Detection, Inspection, and Bad Order Procedures
Inspect brake shoes for wear and cracks, piston travel (typically 7–9 inches for freight cars, per the applicable rule), slack adjusters, brake rigging, hoses, angle cocks, retaining valves, and wheels for flats or shells. Listen and feel for air leaks.
298 words, about 1 min06Air Brake and Train Handling Rules Compliance, Safety, Hazard Awareness, and Emergency Procedures
Follow the NS air brake and train handling rules, FRA 49 CFR Part 232, and AAR requirements. Use blue signal protection and lockout/tagout when working on or under equipment.
283 words, about 1 min