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adjusted allow amount armature automatic boiler bottom called carried cast cause cent circuit closed coal coil complete connected construction crank cylinder diameter direct discharge drum eccentric electrical elevator engine equal evaporation exhaust expansion feed feet field fire flow force front fuel furnace furnished fusible plug gases gauge gear governor grate head heat heater horse power inches increased indicator iron joint length less lever lower machine magnetic means motion moved necessary operation pass permit pipe piston placed plate port position pounds pressure prevent produced proper pump regulated riveted safety separate shaft shell shown shown in Fig shows side space speed spring square steam steel stop strength stroke sufficient supply surface temperature tion trap tubes usually valve weight wire
Page 256 - To find the pressure in pounds per square inch of a column of water, multiply the height of the column in feet by .434. Approximately, we say that every foot elevation is equal to % Ib. pressure per square inch ; this allows for ordinary friction. To find the diameter of a pump cylinder...
Page 893 - Multiply one-sixth of the lowest tensile strength found stamped on any plate in the cylindrical shell by the thickness — expressed in inches or parts of an inch — of the thinnest plate in the same cylindrical shell, and divide by the radius or half diameter — also expressed in inches — and the...
Page 433 - See that the boiler is thoroughly heated before the trial to its usual working temperature. If the boiler is new and of a form provided with a brick setting, it should be in regular use at least a week before the trial, so as to dry and heat the walls. If it has been laid off and become cold, it should be worked before the trial until the walls are well heated. VII.
Page 433 - Watermeters, as a rule, should only be used as a check on other measurements. For accurate work, the water should be weighed or measured in a tank. 3. Thermometers and pyrometers for taking temperatures of air, steam, feed-water, waste gases, etc.
Page 436 - The ash pits should be thoroughly cleaned at once after starting. Before the end of the test the fires should be burned low, just as before the start, and the fires cleaned in such a manner as to leave the same amount of fire, and in the same condition, on the grates as at the start.
Page 116 - The calorie is the amount of heat necessary to raise the temperature of one gram of water one degree centigrade.
Page 441 - Prefer to the proportions of carbon, hydrogen, oxygen, and sulphur, respectively, as determined by the ultimate analysis. It is desirable that a proximate analysis should be made, thereby determining the relative proportions of volatile matter and fixed carbon. These proportions furnish an indication of the leading characteristics of the fuel, and serve to fix the class to which it belongs.
Page 432 - I. Determine at the outset the specific object of the proposed trial, whether it be to ascertain the capacity of the boiler, its efficiency as a steam generator, its efficiency and its defects under usual working conditions, the economy of some particular kind of fuel, or the effect of changes of design, proportion, or operation; and prepare for the trial accordingly (see note, p.
Page 441 - Calorific Tests and Analysis of Coal.— The quality of the fuel should be determined either by heat test or by analysis, or by both. The rational method of determining the total heat of combustion is to burn the sample of coal in an atmosphere of oxygen gas, the coal to be sampled as directed in Article XV. of this Code.
Page 437 - The boiler being thoroughly heated by a preliminary run, the fires are to be burned low and well cleaned. Note the amount of coal left on the grate as nearly as it can be estimated ; note the pressure of steam and the water level, and note this time as the time of starting the test.