3. Q. For ordinary operation, how much steam pressure is required?
A. About fifteen pounds, with piston strokes varying from 10 to 15 per minute.
4. Q. How can the duplex stoker driving engine be started, stopped, or reversed?
A. By means of operating and reversing rod, fastened to the back head and connected with the valve on reverse head of engine cylinder.
5. Q. How can the conveying screws be started, stopped, or reversed separately or together?
A. By ratchet and pawl arrangement controlling each.
6. Q. What practice should be followed in building up the fire before leaving a terminal?
A. Build up a light even fire by hand and do not bring stoker into use until the locomotive is working steam.
7. Q. How should the stoker be oiled and operated?
A. It should be thoroughly oiled before leaving the terminal, then see that operating rod on back head is in center or running position, open main jet line so they register about fifteen pounds on the jet steam gauge if coal is coarse, or ten pounds if coal is small. Next, the driving engine steam valve should be opened wide and the throttle valve opened just enough to supply the proper amount of coal to the fire-box.