A Textbook on Marine Engineering ...: Steam and Steam Boilers, Steam Engines, the Machinery of Western River Steamboats, Recent Developments in Marine EngineeringInternational textbook Company, 1900 |
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Σελίδα 56
... base , the rate per cent . , the percentage , the amount , and the difference . 179. The base is the number on which the per cent . is computed . 180. The rate is the number of hundredths of the base to be taken . 181. The percentage is ...
... base , the rate per cent . , the percentage , the amount , and the difference . 179. The base is the number on which the per cent . is computed . 180. The rate is the number of hundredths of the base to be taken . 181. The percentage is ...
Σελίδα 57
... base , divide the percentage by the rate , expressed decimally . Formula , base = percentage rate . EXAMPLE . - 76 % of a lot of boiler tubes are used in the construction of a boiler . If the number of tubes used were 228 , how many ...
... base , divide the percentage by the rate , expressed decimally . Formula , base = percentage rate . EXAMPLE . - 76 % of a lot of boiler tubes are used in the construction of a boiler . If the number of tubes used were 228 , how many ...
Σελίδα 58
... base and rate are given , by multiplying the base by 1 plus the rate , ex- pressed decimally . For suppose that it is desired to find the amount when 200 is the base and 6 % is the rate . The percentage is 200 x .06 12 , and , according ...
... base and rate are given , by multiplying the base by 1 plus the rate , ex- pressed decimally . For suppose that it is desired to find the amount when 200 is the base and 6 % is the rate . The percentage is 200 x .06 12 , and , according ...
Σελίδα 59
... ( base ) that it is desired to find . Con- sequently , if 212 106 % , 1 % 12 , and 100 % = 2 × 100 = 200 the base . But the same result may be obtained by dividing 212 by 1 + .06 or 1.06 , since 212 ÷ 1.06 200 . Hence , = = = Rule 26 ...
... ( base ) that it is desired to find . Con- sequently , if 212 106 % , 1 % 12 , and 100 % = 2 × 100 = 200 the base . But the same result may be obtained by dividing 212 by 1 + .06 or 1.06 , since 212 ÷ 1.06 200 . Hence , = = = Rule 26 ...
Σελίδα 60
... base ; hence , 127,344 is the difference , and 30 % is the rate . Applying the rule , 127,344 ÷ ( 1 — .30 ) = 181,920 foot - pounds . Ans . 192. EXAMPLE . - A certain chimney gave a draft of 2.76 inches of water . By increasing the ...
... base ; hence , 127,344 is the difference , and 30 % is the rate . Applying the rule , 127,344 ÷ ( 1 — .30 ) = 181,920 foot - pounds . Ans . 192. EXAMPLE . - A certain chimney gave a draft of 2.76 inches of water . By increasing the ...
Συχνά εμφανιζόμενοι όροι και φράσεις
angle ash pit belt body bottom burned carbon cast iron center of gravity circumference cock column condenser connected cubic foot cylinder denominator distance divided divisor driven engine equal evaporated EXAMPLE.-What EXAMPLES FOR PRACTICE feed-water feet figure fire flanged force fraction fuel gases gauge given grate head heating surface Hence horsepower hotwell hydrogen inches in diameter iron kinetic energy lap joint latent heat length lever load marine boilers mercury multiplied number of revolutions number of teeth oxygen piston pitch plate pounds of water pounds per square pressure allowed pulley pump quantity quotient raise ratio revolutions per minute rivets rope safety valve saturation screw shaft shell shown in Fig side smokestack SOLUTION square inch square root stay staybolts stayrods steam drum steam pipe steam pressure steel stop-valve stress temperature tensile strength tubes velocity vessel volume water-tube boilers weight wrought-iron
Δημοφιλή αποσπάσματα
Σελίδα 137 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Σελίδα 149 - Newton's Three Laws of Motion," and are as follows: I. All bodies continue in a state of rest, or of uniform motion in a straight line, unless acted upon by some external force that compels a change.
Σελίδα 474 - The conditions of the boiler and furnace in all respects should be, as nearly as possible, the same at the end as at the beginning of the test. The steam pressure should be the same, the water level the same, the fire upon the grates should be the same in quantity and condition, and the walls, flues, etc., should be of the same temperature.
Σελίδα 93 - The terms of a ratio are the two numbers to be compared ; thus, in the above ratio, 20 and 4 are the terms. When both terms are considered together, they are called a couplet ; when considered separately, the first term is called the antecedent, and the second term the consequent. Thus, in the ratio 20 : 4, 20 and 4 form a couplet, and 20 is the antecedent, and 4 the consequent.
Σελίδα 119 - If a straight line be drawn through two sides of a triangle, parallel to the third side, a second triangle will be formed whose sides will be proportional to the corresponding sides of the first triangle.
Σελίδα 97 - The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means.
Σελίδα 10 - The number thus added to itself, or the number to be multiplied, is called the multiplicand. The number which shows how many times the multiplicand is to be taken, or the number by which we multiply, is called the multiplier.
Σελίδα 476 - The boiler should be run continuously, without stopping for meal times or for rise or fall of pressure of steam due to change of demand for steam. The draught being adjusted to the rate of evaporation or combustion desired before the test is begun, it should be retained constant during the test by means of the damper. If the boiler is not connected to the same steam pipe with other boilers, an extra outlet for steam with valve in same should...
Σελίδα 152 - In a moving body, the line described by its center of gravity is always taken as the path of the body. In finding the distance that a body has moved, the distance that the center of gravity has moved is taken.
Σελίδα 473 - ... calculation of the results of the test corrected accordingly. Wherever possible, the test should be made with standard coal of a known quality. For that portion of the country east of the Alleghany Mountains, good anthracite egg coal or Cumberland semibituminous coal may be taken as the standard for making tests. West of the Alleghany Mountains and east of the Missouri River, Pittsburg lump coal may be used.