38. Q. At what pressure is the regulating spring adjusted?
A. About fifteen pounds.
39. Q. What pressure is required in the main reservoir before air is admitted to the parasite reservoir?
A. At least fifteen pounds above that in the brake pipe.
40. Q. What pressure is obtained in the parasite reservoir?
A. The same as that in the main reservoir, when the main reservoir pressure is fifteen pounds greater than that in the brake pipe.
41. Q. What will prevent the charging of the parasite reservoir, and what should be done?
A. This may be caused by the feed valve being improperly adjusted, sticking in open position or leakage of main reservoir air past the valve to the feed valve pipe and governor top.
WESTINGHOUSE 9½ OR 11-INCH COMPRESSOR
42. Q. What is the duty of the air compressor?