A Textbook on Plumbing, Heating, and Ventilation, Τόμος 51897 |
Συχνά εμφανιζόμενοι όροι και φράσεις
00 gauge amperes angles annex Applying rule B. T. U. per hour base Base percentage boiler candle power Cast Iron ciphers circle circular mils circumference column combustion consequently considered any longer contained copper cubic feet cubic foot decimal places diameter difference distance divided dividend equals erased entirely figure flame floor flow flue flush following the title formula frustum gallons heating surface Hence hundredths improper fraction joint length lowest denomination metal minuend minute mixed number multiplicand multiplier nearly obtained percentage pounds pressure quotient radiator reduce remaining reserve root seams shown in Fig solder square feet square foot square inches steam STRENGTHS OF MATERIALS strokes subtract Table tank temperature ten-thousands thousandths trap trial divisor triangle tube valve velocity volts volume water hammer weight whole numbers wiped wire write yards zinc
Δημοφιλή αποσπάσματα
Σελίδα 16 - Operations with Fractions A) To change a mixed number to an improper fraction, simply multiply the whole number by the denominator of the fraction and add the numerator.
Σελίδα 67 - Divide the difference in temperature, between that at which the room is to be kept and the coldest outside atmosphere, by the difference between the temperature of the steam pipes and that at which you wish to keep the room, and the product will be the square feet, or fraction thereof of plate or pipe surface to each square foot of glass (or its equivalent in wall surface).
Σελίδα 4 - In the multiplication of whole numbers, place the multiplier under the multiplicand, and multiply each term of the multiplicand by each term of the multiplier, writing the right-hand figure of each product obtained under the term of the multiplier which produces it.
Σελίδα 51 - The pressure exerted by a fluid in any direction upon any plane surface is equal to the weight of a prism of the fluid whose base is the projection of the surface at right angles to the...
Σελίδα 108 - In any proportion, the product of the means equals the product of the extremes.
Σελίδα 18 - If necessary, reduce the fractions to a common denominator, add the numerators, and write the sum over the common denominator.
Σελίδα 66 - Ascertain the weight of moisture in the air before it is heated, and compute the weight of moisture required to produce the desired degree of humidity in the same weight of air at the temperature at which it is to be used; the difference between the quantities of moisture thus found will be the amount of moisture to be supplied. EXAMPLE. — A certain room is supplied with air having a temperature at the registers of 120°, at the rate of 300 cubic feet per minute.
Σελίδα 120 - An angle inscribed in a circle is measured by one-half the intercepted arc. In this case, the angle intercepts one-fourth the circumference, and is measured by one-eighth the circumference, or by 360° X 5- = 45°.