Q. How are all bearing surfaces, such as screw-threads, prepared for storage?
A. By first thoroughly cleaning them with brushes, kerosene, waste, etc., and then covering with the above mixture of white lead and tallow.
A. Fill all oil-holes, and keep all parts free from dust and foreign material; see that all connections are tight; see that all brushes are in good condition, and replace worn ones by new ones. Use very fine _sandpaper_ for slight inequalities of the commutator.
Q. How are the mine-panel and the switchboard cared for?
A. See that all bolts to busses are tight, that all lamps are screwed home, that all contacts are clean and free from gum or dirt, that all switches work properly and all contacts correctly made.
Q. How should electric lights be cared for?
A. They should be kept clean and polished. Any snap-switch that sparks badly should be replaced. No verdigris should be allowed to accumulate on any brass fittings. When a lamp becomes dull or black inside, a new one should replace it. When any fuse is blown out, new ones should be put in. (Never use copper wire as a substitute for a fuse.)
A. Simply kept clean and in a dry place. They should be tested with a circuit-detector once in a while.
Q. How is the charging-generator cared for?
A. Keep free from dirt or rust, fill all oil-holes, clean the commutator with a dry rag, keep the brushes set so as to make good contact, and when not in use cover with a rubber paulin.
A. The oil-engine should be kept clean and nicely painted, all oil-holes filled, the water-tank filled and free from mud and sediment, the vaporizer examined from time to time and kept free from packed carbon, the piston clean and well oiled, the poppet-valves tight and free from any clogging material, the starting-torch clean and free from soot.
Q. When putting a piece of machinery out of commission what is done?
A. All bearing surfaces are exposed, cleaned, and covered with white lead and lard-oil or a similar substitute preservative. All small loose parts are removed, covered with cosmic wrapped in burlap, and stored under cover. The machine should also be housed.
Q. Name some of the principal cleaning materials.
A. Steel scrapers, button and wire brushes, waste, pomade, sandpaper, emery and crocus cloth, gasoline, kerosene, and alcohol.