: Charge the auxiliary
reservoir; apply the brake; and release the brake.

10. Q. What is the purpose of the auxiliary reservoir?

A. It is here that the air is stored that is admitted to the brake
cylinder when the brake is applied; thus, each car carries its own brake
power.

11. Q. What is the purpose of the brake cylinder?

A. It is here where the power of the compressed air is converted into
work by forcing the brake piston out, moving the brake levers, rods and
brake beams, forcing the brake shoes against the wheels, applying the
brake.

12. Q. What is the purpose of the brake pipe and angle cocks?

A. It is through the brake pipe that all brakes in the train are placed
into communication with the brake valve on the locomotive; and through
the brake pipe, air from the main reservoir flows to the triple valves
and auxiliary reservoirs on the different cars. The angle cocks are for
the purpose of opening and closing the ends of the brake pipe.

13. Q. What is the purpose of the cut-out cock?

A. To cut out any brake that is not in operating condition.

14. Q. How is a brake cut out?

A. By closing the cut-out cock in the cross-over pipe and bleeding the
auxiliary reservoir.

15. Q. How would you bleed an auxiliary reservoir?

A. By holding open the release valve on the reservoir until all air has
escaped.

16. Q. How would you bleed off a stuck brake?

A. By holding open the auxiliary release valve until the brake piston
starts to move toward release position.

=OIL BURNING LOCOMOTIVES=

1. Q. What are the fireman's duties on arrival at the enginehouse
previous to going out on an oil burning locomotive?

A. In addition to the duties usually performed on any engine, the
fireman should observe the condition of draft pans and arch, observe the
condition of burner and dampers; try the oil regulating valve; see that
the burner is properly delivering fuel oil to the fire; see that the oil
heaters are in working order; that the fuel oil is heated to proper
temperature; and see that proper supplies of fuel oil, sand and water
have been provided as well as the necessary tools for handling an oil
fire.

2. Q. How warm should the oil be at all times in the tank.

A. Warm enough to flow freely at all times, usually about 112 degrees.
This temperature is about that which the hand can bear on the outside of
the tank.

3. Q. If the oil is too warm, what happens?

A. Many of the good qualities of