Mechanical drawing, answers to questionsInternational Textbook Company, 1899 |
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angle beam bending moment center line channels circle compressive stress construction curve dead load stresses decimal denominator diameter dimensions divided draw DRAWING PLATE drawn end post equal feet figures flange fraction frustum hanger head Hence hip vertical holes horizontal intersection lateral rods left reaction live and dead load line load unit stress lower chord maximum stress multiplied obtained one-half panel length panel load parallel pin plates polygon for joint portal pressure Question R₁ radius radius of gyration represents rivet Scale of distance Scale of forces shear shown in Fig side elevation square inch stress diagram Stress in B C Stress in CD Stress in D stress sheet tensile stress thickness tie bar triangle truss unit stress allowed upper chord velocity width wind stresses Wrought Iron
Δημοφιλή αποσπάσματα
Σελίδα 19 - When mixed numbers and whole numbers are to be added, add the fractional parts of the mixed numbers separately, and if the resulting fraction is an improper fraction, reduce it to a whole or mixed number. Next, add all the whole numbers, including the one obtained from the addition of the fractional parts, and annex to their sum the fraction of the mixed number obtained from reducing the improper fraction.
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 44 - Better results will be obtained if £ an ounce of gum arabic is dissolved in each solution. When ready to prepare the paper, mix equal portions of the two solutions, and be particularly careful not to allow any more light to strike the mixture than is absolutely necessary to see by. For this reason it is necessary to have a dark room to work in. There must be in this room a tray or sink of some kind that will hold water; it should be larger than the blueprint and about 6 inches deep. There should...
Σελίδα 70 - AG in Fig. 2. If a second plate were cut out in the same manner and bent into a circle, the two pieces on being brought together, as shown in Fig. 2, would touch at every point. The problem is to find the shape of the curve G' A
Σελίδα 187 - ... the ratio of the ovendry weight of a sample to the weight of a volume of water equal to the volume of the sample at some specific moisture content, as green, air-dry, or ovendry.
Σελίδα 54 - O of the two center lines as a center, and with a radius equal to the radius of the hole, describe a circle. Through the points A, B, E, and F, draw indefinite straight lines parallel to m n. On both sides of the center line/ q, lay off on these lines DS and SA, equal to £ DA, and HR and RE, equal to £ HE, both DA and HE being measured on the frustum. Through the points...
Σελίδα 14 - ... the face of the stone. Repeat the process for the other blade. To be in good condition, the edges should be fairly sharp and smooth, but not sharp enough to cut the paper. All the sharpening must be done on the outside of the blades. The inside of the blades should be rubbed on the stone only enough to remove any burr that may have been formed. Anything more than this will be likely to injure the pen. The whole operation must be done very carefully, bearing lightly, as it is easy to spoil a pen...
Σελίδα 41 - AC should be, for this plate, 1^" long. Produce AC to B. From C as center, with a radius equal to CA, describe the semicircle A 1 23 456 7 ' B, and divide it into as many equal parts as there are sides in the required polygon (in this case eight).
Σελίδα 57 - GH indicates that only a part of the rivet is shown. This is done so as not to take up too much space on the drawing. Fig. 9 shows an ordinary square-headed bolt ^" in diameter, having a head If...
Σελίδα 29 - Ex. 3. — To draw a perpendicular to a straight line, from a given point in that line, Fig.