Instructions for Use in Preparation for the Rating of Machinist's Mate 1c and Chief Machinist's Mate: A Course of Nineteen Assignments |
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adjusted alignment bearing blower boiler bolts brine burette CALIFORNIA LIBRARY cause centrifugal circulating clean clearance angle coils compressor condensate pump connected cooler cooling cutter cutting edge cylinder diameter discharge drain drill drum efficiency engine excess feed Figure fitted flange Freon fuel gasket gland grinding grooves heat holes inch index crank index head indicator inspection installed INSTRUCTION TEST insulation joints journal leakage leaks lubricating machine MACHINIST'S MATE metal milling cutter milling machine moving blades necessary nozzles nuts obtained operation packing pinion pipette piping piston pitch planer plate pounds pressure prevent proper rake angles reciprocating engines reduced reduction gear refrigerating relief valve removed repairs ring rotor salinometer screw seat shaft ship side speed spindle steam steel stopcock stuffing box suction surface tank teeth temperature thrust tion tool tool bit turbine UNIVERSITY OF CALIFORNIA vacuum vapor wheel
Popular passages
Page 174 - In this burner the oil is forced under a pressure of 75 to 200 Ib. per sq. in. tangentially through an annular chamber in the burner tip, — the chamber being so arranged as to give the oil a high velocity of rotation, and thus under the action of centrifugal force to break it up into finely divided fog-like particles. The annular chamber or tangential groove discharges into a small cylindrical chamber, the tip end of which is coned out. At the apex of the cone is the orifice through which the oil...
Page 172 - At very high rates of combustion, when the flame completely fills the furnace, the very high furnace temperatures preclude the presence of these temperature colors. An incandescent and dazzling white still indicates excess air, but a reduction in this excess is only indicated in the furnace by a softening in the intensity of the white flame.
Page 154 - Dalton's laws, when a number of gases are confined in a given space, each gas occupies the total volume at its own partial pressure, and the total pressure is, therefore, the sum of all the partial pressures. When one of the gases is absorbed by a suitable medium and the remaining gases are compressed to their original total pressure, a volume decrease results and, if the temperature remains constant, this decrease equals the volume absorbed. The...
Page 332 - The dead center of a drill is the sharp edge at the extreme tip end of the drill. It is formed by the intersection of the cone-shaped surfaces of the point and should always be in the exact center of the axis of the drill. The point of the drill should not be confused with the dead center. The point is the entire cone-shaped surface at the end of the drill.
Page 175 - As a result, on leaving the orifice, the oil breaks up into very fine foglike particles. Each particle of oil tends to fly off in a straight line at an acute angle to the axis of the orifice, and also at an acute angle to the tangent to this orifice at the point left by the particle of oil. The path of each individual particle of oil would be a straight line as above, except for the downward curve due to the action of gravity.
Page 376 - To illustrate the usual calculations assume that a spiral of 12 inch lead is to be cut. The compound ratio of the driven to the driving gears equals the desired lead divided by 10, or it may be represented by the fraction T§.
Page 186 - ... two compartments by a partition. The oil from the upper end of the bearing collects above this partition and is caused to flow in a thin film along the side of the inner casing by means of a large number of narrow slots formed around the periphery of this partition. This is indicated by the arrows. The cooling surface is quite effective, since on the one side it has high velocity air and on the other, the oil flows rapidly in. a thin film. In blowers recently constructed there is provided in...
Page 183 - Chapter 4. The blower assembly is entirely self-supporting, its entire weight being carried by the upper flange of the outer casing, which is bolted to the ship's structure. One very important feature of this design is the means provided for preventing the escape of oil into the air stream. Since the pressure around the upper end of the shaft, where it emerges from the casing, may be considerably below atmospheric, there is a large difference of pressure tending to pull...
Page 209 - ... texture, and degree of roughness of the surface. A bright smooth surface offers a greater surface reluctance to the radiation of heat than a dull or matte surface. This fact explains why the loss will be less when the insulation is covered with a bright metal jacket than it would if such metal jacket were not used; also why it is quite possible to change the surface of a body with paint and reduce, under certain conditions, the radiation loss. 2-3. EFFECT OF AIR CIRCULATION. Surface radiation...
Page 377 - Helix 10 The compound ratio of the driven to the driving gears may always be represented by a fraction whose numerator is the lead to be cut and whose denominator is 10.