15

Fog Signal – Continued.
(j) Number of grate bars,
(k) Kind of grate bars,
(l) Kind of coal or other fuel generally used,
(m) Kind of safety valve,
(n) Maximum pressure the boiler is capable of,
(o) Usual working pressure,
(p) Diameter of smokestack,
(q) Height of smokestack from grate,
(r) Height or length of steam drum, ___________; diameter, _______________
(s) Kind of covering or jacket,
(t) Present condition of boiler,
(u) When built,
(v) Where built,
(w) By whom built,
(x) Is there a heater? ________; what kind? ________; what size? _____________; how much does it use reduce the time of starting the fog signal? ________________
127. If a steam engine is used, kind: ____________; number of revolutions per minute, _____
(a) Diameter of cylinder,
(b) Stroke of piston,
(c) Size of steam pipe,
(d) When built,
(e) Where built,
(f) By whom built,
128. Whistle, trumpet, or siren, pressure at which blown, ___________________
129. Diameter of whistle, __________; height, _______; distance between orifice and edge of whistle, ______; single tone, ___________; chime, ______________