The Elements of Steam Engineering Prepared for Students of the International Correspondence Schools, Scranton, Pa Volume 5

The Elements of Steam Engineering Prepared for Students of the International Correspondence Schools, Scranton, Pa Volume 5 PDF

Author: International Schools

Publisher: Rarebooksclub.com

Published: 2013-09

Total Pages: 30

ISBN-13: 9781230024172

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ...volume of steam in the large cylinder. Ans. (c) Ratio: 1Z1.'43ti,1 or 2.522: 1. Ans. (202) Let the equilateral triangle A BC, Fig. 10, rep3 resent the base of the pyramid. By rule 50, Art. 385, the altitude A D of the triangle: 4/ 10'--5 = 4/% = 8.6602 in., and according to. rule 51, Art. 386, the area A of the triangle:: 43.301 sq. in. D 0. 2 FIG. 10. Using rule 65, Art. 423, volume of pyramid: area of base altitude::144.336 cu. in. Ans. (203) In Fig. 11, let OHbe the altitude and OE the slant height of the pyramid. FIG. 11. (204) The area of the convex surface = circumference 1. of base 5 slant height: 18.8496 X 1; = 94.248 sq. in. (See rule 64, Art. 422.) The area of the entire surface = 94.248 sq. in.--the area of the base. The diameter.84. of the base = = 6 in.'; hence, the area of the base = 6' X-7854 = 28.2744 (rules 56 and 58, Arts. 403 and 405); therefore, the area of the entire surface F 94.248 + (206) The vat has the form of an inverted frustum of a pyramid. Area of larger base = 15' 225 sq. ft.; area of smaller base = 12' 144 sq. ft. Hence, by rule 67, Art. 427, the contents of the vat in cubic feet: --11 11 11 (225---144+ 4/225x 144) E-=(369 + 180) X--3--= 549 X1,7 = 2,013 cu. ft. This should be reduced to cubic inches by multiplying by 1,728, the number of cubic inches in a cubic foot. 2,013 X 1,728: 3,478,464 cu. in. Since there are 231 cubic inches in a gallon, the number of gallons 3,478,464 _---15,058.29. Ans. (207) The pail is in the form of a frustum of a cone. Area of larger base _--_ 12' X.7854: 113.0976 cu. in. Area of smaller base = 63.6174 cu. in. Hence, the contents in that the vat will hold: cubic inches = The contents of the vat in cubic inches were found in the last example to be.

The Elements of Civil Engineering; Prepared for Students of the International Correspondence Schools, Scranton, Pa... . Volume 6

The Elements of Civil Engineering; Prepared for Students of the International Correspondence Schools, Scranton, Pa... . Volume 6 PDF

Author: International Schools

Publisher: Rarebooksclub.com

Published: 2013-09

Total Pages: 152

ISBN-13: 9781230084800

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 edition. Excerpt: ...of pounds of water which a pound of coal will raise from 60 and evaporate into steam at 80 lb. pressure. As will be explained later, it is customary, for the purpose of calculation, to reduce both Wand 2 to the equivalent evaporation from and at 212 F. ExAMPLE.--Find the grate area of an 80 H. P. boiler, evaporating 30 lb. of water from and at 212 per H. P. per hour, the rate of combustion being 12 lb. per sq. ft. of grate surface per hr., and the evaporation 1011-lb. of water from and at 212 per pound of coal. 1831. The heating surface of a boiler includes the entire surface of the shell and flues coming in contact with the flame and furnace gases on one side and water on the other; this includes, in the case of externally fired boilers, the portion of the shell below the fire line, portions of the heads, and the inner surface of fire tubes and flues, or the outer surface of water tubes. In the case of internally fired boilers, the heating surface includes the interior of the firebox, or furnace flues, and the inner surface of the tubes, if there are any. The area of the heating surface of each of the various types of boilers bears a nearly constant ratio to the grate area. The ratios usually adopted are as follows: Plain cylindrical boilers........................ 12 to 15 Cornish....................................... 15 to 30 Cylindrical flue................................ 20 to 25 Cylindrical tubular............................ 25 to 35 Marine fire tubular............................ 30 to 35 Marine water tubular.......................... 35 to 40 Locomotive tubular............................ 50 to 100 1832. From a large number of tests of horizontal tubular boilers, Mr. G. H. Barrus concludes that the ratio of heating surface to...

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