tion of over two pounds in brake pipe pressure; if it
does, it indicates a dirty condition of the valve, and should be
cleaned.

106. Q. If the main reservoir pipe connection to the feed valve breaks,
what should be done?

A. This will cause a loss of main reservoir air, and both ends of the
pipe must be plugged. As no air now comes to the feed valve to charge
the brake pipe in running or holding position of the brake valve, the
handle must be carried in release position.

107. Q. What must be done if the pipe between the feed valve and
automatic brake valve breaks?

A. Slack off on the regulating nut of the feed valve until all tension
is removed from the regulating spring and plug the pipe toward the brake
valve. To charge the brake pipe, the brake valve handle must be carried
in release position.

108. Q. If the feed valve becomes defective so that it will not control
brake pipe pressure, what may be done?

A. As the reducing valve used for the independent brake, and the feed
valve are practically the same, they may be changed one for the other,
the reducing valve taking the place of the feed valve.

INDEPENDENT BRAKE VALVE

109. Q. Name the different positions of the independent brake valve used
with the E-T equipment.

A. Release, running, lap, slow-application position, quick-application
position.

110. Q. What is the purpose of release position?

A. To release the locomotive brake when the automatic brake valve is in
other than running position.

111. Q. What is the purpose of running position?

A. This is the proper position for the brake valve when not in use, and
to release the locomotive brake when the automatic brake valve is in
running position.

112. Q. What is the purpose of lap position?

A. To hold the locomotive brake applied after an independent
application.

113. Q. What is the purpose of slow-application position?

A. This position may be used when it is desired to make a light or
gradual application of the brake, as in stretching or bunching the slack
of a train.

114. Q. What is the purpose of quick-application position?

A. To apply the locomotive brake quickly, as in short switching.

115. Q. What brake cylinder pressure is usually developed with this
brake?

A. About forty-five pounds.

DEAD ENGINE FEATURE

116. Q. What is the dead engine device?

A. The dead engine device is a pipe connection between the main
reservoir and the brake pipe. In this pip