(17) What pressure does (a) the red hand, and (b) the black hand, of the duplex aa#39; ir gauge indicate? ... (22) Explain how the plain triple works, and trace the flow of air through it, (a) in releasing the brakes; (b) in making two reductions during aanbsp;...
|Title||:||A Treatise on the Westinghouse Air Brake ... Containing a Large Number of Practical Questions|
|Author||:||International Correspondence Schools|