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Millwright – Power Tools – Study Guide & Practice Questions-5.docx
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Drill Press - correct answer ✔✔Consists of a stationary mounted drill, a drive motor, an adjustable table, and the necessary controls, all mounted on a column with a base that is fastened to the floor or to the bench. Usually has some type of vise arrangement that fits in the table to hold the work being drilled. Special jigs are used to hold odd-shaped objects on the table. - correct answer ✔✔The Drill Press Is adjusted by positioning the belt on the appropriate pulley. - correct answer ✔✔The speed of the drill When operating any type of drill press, lighten the feed pressure _________________? - correct answer ✔✔Just before you breakthrough (also called piercing) the pierce. Hydraulic presses can be vertical or horizontal, but the _______________ type is the most common? - correct answer ✔✔Vertical Shop presses vary in size from ______________ to _____________ capacities and may be hand pumped or have electric pump to power the cylinder - correct answer ✔✔5-, 60-Ton Can produce a great amount of pressure. If an excessive amount of pressure is applied to a part, the part could reach the breaking point without any visible indication that too much pressure is applied. - correct answer ✔✔Hydraulic Presses
The only way to determine the amount of pressure being exerted by the hydraulic press is to? - correct answer ✔✔Watch the pressure Gauge Are designed with a gear drive and chucks, which hold and turn the pipe, and a three-position selector switch consisting of forward, off, and reverse drive positions. - correct answer ✔✔All pipe threading machines Depending on size and complexity of the machine, pipe threading machines can be mounted on ____________, tables or special stands. - correct answer ✔✔Tripods Come in a variety of models, from basic gear-drive type with front and rear pipe-holding chucks to the all-purpose model with built in cutters, oilers, reamers, and a pipe threading die. - correct answer ✔✔Pipe threading machines Loading pipe into threading machine step 4 - correct answer ✔✔Turn the centering device clockwise to tighten it Loading pipe into threading machine step 5 - correct answer ✔✔Turn the handwheel counterclockwise to tighten the chuck jaws. A counterclockwise turn tightens the jaws on the pipe. A clockwise turn releases the jaws. There are _______ sets of dies that are used to thread pipe up to 2 inches in diameter. - correct answer ✔✔ 4 One set of that is used to thread pipe __________ in diameter and larger. - correct answer ✔✔2 1/2 inches _________ are classified according to the number of threads per inch. - correct answer ✔✔Dies
Two sets of dies are used with geared threaders. One set is used for pipe that is ____________ inches in diameter and the other set is used for pipe that is ____________ inches in diameter. - correct answer ✔✔2 1/2 to 4, 4 to 8 A geared threader - correct answer ✔✔Produces an enormous amount of torque while threading it. It can easily tip over the threading machine if the machine is not properly secured. Bolt the threading machine to a steel table and secure the pipe in a vise that is bolted to a steel table. Nibblers - correct answer ✔✔Are used for cutting irregular shapes and do not leave a finished edges. The width of the cut is usually more than 1/8 inches. When using a belt sander with the head in the horizontal position, the back stop must be - correct answer ✔✔Used to keep work from being carried along with the belt Horizontal Bandsaws - correct answer ✔✔The basic functions is repetitive cutting of pieces to length, are used to cut solid bar stock, structural forms, and pipe. A key Broach - correct answer ✔✔Is a hardened, tapered tool with metal cutting teeth used to cut holes. Can also used to cut internal keyways and gears. Interference fit, or shrink fit - correct answer ✔✔Bearings have any inside dimension that is smaller than the outside dimension of the shaft that they fit on. To prevent damage - correct answer ✔✔Bearings must be heated slowly and evenly to
250 F - correct answer ✔✔A bearing should never be heated to a temperature above electric oven - correct answer ✔✔Bearings of largess size can be heated this way Oil bath heater - correct answer ✔✔The oil is heated to a temperature in the range between 150F and 250F Induction Heaters - correct answer ✔✔The most commonly used bearings heaters. They are safe, fast, and easy to use. With an induction heater, the bearing is heated from the inside out. Magnetic Drill Step 10 - correct answer ✔✔Increase pressure once the bit has started cutting. Too much pressure on the bit can cause overheating and galling of the bit. Always use plenty of cutting oil and apply only enough to keep the bit cutting smoothly.