12. Q. Name the different positions of the independent brake valve.
A. Release, running, lap, slow application and quick application positions.
13. Q. How many kinds of triple valves are there in use?
A. Two; plain and quick action.
14. Q. How is the automatic brake applied? How released?
A. The automatic brake is applied by a reduction of brake pipe pressure, and is released by restoring the brake pipe pressure.
15. Q. When the independent brake valve handle is placed in application position, are the train brakes affected?
A. No; only the brakes on the locomotive are applied.
16. Q. What controls the pressure in the main reservoir?
A. The compressor governor.