Which components must be properly positioned prior to performing a brake test?

Which components must be properly positioned prior to performing a brake test?

• A. Angle cocks, end cocks, and cutout cocks.
• B. Main reservoir valves and fuel cutoffs.
• C. Wheel flange alignment devices.
• D. Brake shoe clearance gauges.

Answer: (A)

In a brake test, you must control where air can flow in the system so you can accurately observe how the brakes respond without unintended leaks or cross-communication between sections. The valves that do this control flow along the brake pipe and air lines are angle cocks, end cocks, and cutout cocks. By positioning these correctly, you isolate the portion of the train you’re testing and ensure the test measures the intended brake action, while preventing air from escaping or feeding unintended sections. Other items listed aren’t part of the brake test setup: main reservoir valves and fuel cutoffs relate to engine operation, wheel flange alignment devices aren’t involved in brake testing, and brake shoe clearance gauges are used for adjusting shoes rather than for conducting the test.

In a brake test, you must control where air can flow in the system so you can accurately observe how the brakes respond without unintended leaks or cross-communication between sections. The valves that do this control flow along the brake pipe and air lines are angle cocks, end cocks, and cutout cocks. By positioning these correctly, you isolate the portion of the train you’re testing and ensure the test measures the intended brake action, while preventing air from escaping or feeding unintended sections.

Other items listed aren’t part of the brake test setup: main reservoir valves and fuel cutoffs relate to engine operation, wheel flange alignment devices aren’t involved in brake testing, and brake shoe clearance gauges are used for adjusting shoes rather than for conducting the test.