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allow amount arranged assumed bars beam boiler building candle-power capacity carbon carried cement cent circuit closed coils column compression compressive stress computed concrete connected considered constructed covered designed diameter direct distance distribution electric Engineers equal Equation feet floor force forms give given greater ground heat illumination incandescent increase insulation lamps least length less light load machine material means metal method mixed necessary operation pipe placed pole possible pounds pounds per square practically pressure prevent proportion radiators reinforced concrete resistance risers sand screen shear shown in Fig shows side slab space square foot square inch steam steel stone strength stress supported surface TABLE taken tank temperature tension tests thickness ultimate unit usually valve vertical voltage walls weight wire
Сторінка 21 - ... being covered with felt and this felt kept wet. The bottom of the box is so constructed as to hold water, and the sides are provided with cleats for holding glass shelves on which to place the briquettes. Care should be taken to keep the air in the closet uniformly moist.
Сторінка 22 - Care should be observed in centering the briquettes in the testing machine, as cross-strains, produced by improper centering, tend to lower the breaking strength. The load should not be applied too suddenly, as it may produce vibration, the shock from which often breaks the briquette before the ultimate strength is reached. Care must be taken that the clips and the sides of the briquette be clean and free from grains of sand or dirt, which would prevent a good bearing.
Сторінка 237 - Must be so placed in wet places that an air space will be left between conductors and pipes in crossing, and the former must be run in such a way that they cannot come in contact with the pipe accidentally. Wires should be run over, rather than under, pipes upon which moisture is likely to gather or which, by leaking, might cause trouble on a circuit.
Сторінка 15 - The use of a proper percentage of water in making the pastes* from which pats, tests of setting and briquettes are made is exceedingly important, and affects vitally the results obtained.
Сторінка 22 - Test pieces should be broken as soon as they are removed from the water. Care should be observed in centering the briquettes in the testing machine, as cross-strains, produced by improper centering, tend to lower the breaking strength. The load should not be applied too suddenly, as it may produce vibration, the shock from which often breaks the briquette before the ultimate strength is reached.
Сторінка 23 - A third pat is exposed in any convenient way in an atmosphere of steam, above boiling water, in a loosely closed vessel for five hours. 23. These pats, to satisfactorily pass the requirements, shall remain firm and hard, and show no signs of distortion, checking, cracking, or disintegrating.
Сторінка 143 - British thermal unit is the amount of heat required to raise the temperature of 1 pound of water 1 degree Fahrenheit.
Сторінка 250 - The cut-out or circuit breaker should always be the first thing that the service wires are connected to after entering the building; the switch next, and then the other fixtures or devices in their order. This arrangement is made so that the cut-out or circuit breaker will protect all wiring in the building, and the opening of the switch will disconnect all the wiring.
Сторінка 49 - Proceedings" of the American Railway Engineering and Maintenance of Way Association : "After the forms are removed, any small cavities or openings in the concrete shall be filled with mortar if necessary. Any ridges due to cracks or joints in the lumber shall be rubbed down; the entire face shall...
Сторінка 239 - Must be protected on side walls from mechanical injury by a substantial boxing, retaining an air space of one inch around the conductors, closed at the top (the wires passing through bushed holes) and extending not less than seven feet from the floor. When crossing floor timbers, in cellars, or in rooms where they might be exposed to injury, wires...