Electric Railway Power StationsF. J. Drake & Company, 1909 - 718 стор. |
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Загальні терміни та фрази
adjusted Allis-Chalmers alternating current Ammeter amperes armature blades brushes butt joint calorimeter carbon cent chimney circuit cleaning clearance coal coil combustion commutator compression condenser connected core crank cubic foot curve cylinder diagram diameter drum dynamo eccentric efficiency evaporated exhaust expansion feed water field fire flue front fuel furnace gas engine gases gauge governor head heat units heater heating surface hole horizontal horse power indicator indicator diagram initial pressure iron joint load machine magnet mean effective pressure mechanical motion motor moving Multiply Oil Switch operation panel passes pipe piston plate plug pole position pounds pump reciprocating engine resistance Rheostat rivets rotary rotary converters shaft shear shell shown in Fig shunt side speed square inch stationary steam turbine stoker stroke surface condenser temperature tion tubes vacuum valve velocity voltage voltmeter volts volume Wattmeter weight wire
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Сторінка 389 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Сторінка 684 - It is better, on this account, in graduating the bottle, to make two scratches as represented in the drawing, one at the top and the other at the bottom of the curve : this prevents any future mistake.
Сторінка 254 - Another form of aspirator draws the gas from the flue in a constant stream, thus insuring a fresh supply for each sample. " The analysis made by the Orsat apparatus is volumetric. If the analysis by weight is required, it can be found from the volumetric analysis as follows: " Multiply the percentages by volume by...
Сторінка 102 - Galvanic Action. — Examine frequently parts in contact with copper or brass, where water is present, for signs of corrosion. If water is salt or acid, some metallic zinc placed in the boiler will usually prevent corrosion, but it will need attention and renewal from time to time.
Сторінка 323 - The action of the piston as it nears the end of the stroke, in reducing the volume and raising the pressure of the steam retained in the cylinder ahead of the piston by the closing of the exhaust valve. Boyle's or Mariotte's law of expanding gases. "The pressure of a gas at a constant temperature varies inversely as the space it occupies.
Сторінка 213 - ... could be utilized in churning or stirring the water, as in Joule's machine. Hence the mechanical equivalent of heat is 778 foot pounds. Specific Heat. The specific heat of any substance is the ratio of the quantity of heat required to raise a given weight of that substance one degree in temperature to the quantity of heat required to raise an equal weight of water one degree in temperature when the water is at its maximum density, 39.1° F. To illustrate, take the specific heat of lead, for instance,...
Сторінка 226 - ... their conducting power for heat, up to their ability to transmit as much heat as the surface of the pipe will radiate, after which they become detrimental, rather than useful, as covering.