Q. Why do boilers sometimes explode just on the point of
starting the engine?
A. Because starting the engine has the same effect as
opening the safety valve.
Q. Are there any circumstances under which an engineer is
justified in allowing the water to get low?
A. No.
Q. Why do they sometimes do it?
A. From carelessness or ignorance.
Q. May not an engineer be deceived in the gauge of water?
A. Yes.
Q. Is he to be blamed under such circumstances?
A. Yes.
Q. Why?
A. Because if he is deceived by it it shows he has neglected
something.
Q. What is meant by "Priming."
A. It is the passing of water in visible quantities into the
cylinder with the steam.
Q. What would you consider the first duty of an engineer on
discovering that the water was foaming or priming
A. Open the cylinder cocks at once, and throttle the steam.
Q. Why would you do this?
A. Open the cocks to enable the water to escape, and throttle
the steam so that the water would settle.
Q. Is foaming the same as priming?
A. Yes and no.
Q. How do you make that out?
A.
Pages:
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141