Questions on Subjects Connected with the Marine Steam-engine: And Examination Papers, with Hints for Their Solution |
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Questions on Subjects Connected with the Marine Steam-Engine Thomas J. Main,Thomas Brown Limited preview - 2023 |
Questions on Subjects Connected with the Marine Steam-Engine Thomas J. Main,Thomas Brown Limited preview - 2023 |
Common terms and phrases
12 inches 16 feet 20 inches 9 feet 9 inches air-pump annular-valve Area of valve atmosphere blow-valve boiler circular inches circumference condenser condenser-gauge stands Constant log crank cubic feet cubic foot cubic inches depth diagram Diameter of cylinder Ditto ditto art eccentric engines of H.M.S. expansion feed-valve box feet 6 inches feet 9 Find the area find the diameter Find the nominal find the pressure foot of brass force gauge Hence inches diameter inches in diameter knots length of stroke lever lift Marine Engine Mean effective pressure mercury mercury rise meter nominal horse-power number of revolutions number of strokes overflow-valve paddle-wheel piston piston-rod port pressure of steam pressure per square propeller quantity of water reverse-valve revolutions per minute screw-propeller side-lever slide slip per cent snifting-valve speed of ship square feet square inches steam is cut steam-engine steam-pressure steamer stroke 2 feet tons tube upper vessel
Popular passages
Page 1 - ... its appearance to an inhabitant of Jupiter, s its appearance to an inhabitant of Saturn, u to an inhabitant of Uranus, and N to an inhabitant of Neptune. The light and heat which it would supply to each of these planets would be in the exact proportion of the apparent surface of the solar disk, and since the areas of circles are as the squares of their diameters, it would follow that the solar light and heat at Jupiter is 25 times, at Saturn 81 times, at Uranus 324 times, and at Neptune 784 times...
Page 13 - ... also the load per square inch, and the position of the piston when the velocity is greatest. (1876.) 37. Describe an equilibrium valve. The upper side of an equilibrium valve is 9 inches in diameter, and the lower side 8 inches ; find the power necessary to lift it when the pressure of steam is 16 u Ibs.
Page 13 - Describe an equilibrium valve. The upper side of an equilibrium valve is 9 inches in diameter, and the lower side 8 inches ; find the power necessary to lift it when the pressure of steam is 16 Ibs. above that of the atmosphere if the space between the upper and lower valves be a vacuum. (1867.) 38.
Page 13 - ... of the stroke. What must be the diameter of the smaller cylinder so as to develope the same horse-power as the large one? Answer. 65 inches nearly. (17.) The length of the stroke of a steam-engine is 4 feet 6 inches, the boiler pressure is 10 lbs. above that of the atmosphere, which is 15 lbs., and the steam is cut off after the piston has traversed 2 feet 6 inches. Find the pressure of the steam in the cylinder when it opens to the exhaust, which is 2 inches before the piston arrives at the...
Page 58 - The pitch of one of the blades of a screw-propeller is 20 feet 8 inches, and the number of revolutions is 42. If there were no slip, what would be the speed of the ship in knots ? Again, the pitch of the other blade being 21 feet 7 inches, if the speed of the ship be that already found, what would be the slip per cent, reckoning from the latter blade 1 12.
Page 24 - Describe the safety valve. If a circular inch be allowed on the area of a safety valve for every 20 square feet of heating surface, what must be the diameter of a valve for a boiler whose heating surface is 1,200 square feet ? (1868.) 18.
Page 63 - What determines the nominal horse-power of an engine ? What evaporating power should a boiler have for a pair of engines of 560 collective horse-power, the diameter of the cylinder being 88 inches, length of stroke 5 feet 9 inches, and making 17 revolutions per minute 1 3.
Page 77 - Show how to find the work done by a crank. What force applied to the extremity of a crank at right angles to it will do the same work as a mean pressure of 4 tons acting on a piston throughout the up and down stroke (1868...
Page 12 - Ibs., and expansion commences when 2 feet of the stroke have been performed. Find the pressure at the end of the stroke...
Page 67 - The port bears due west from her ; will she be able to get within steaming distance by sailing on a NW by W course ? 4.