AGM 2050 Exam 1 questions well answered to pass, Exams of Nursing

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AGM 2050 Exam 1 What is the importance of plans and drawings? - correct answer ✔✔1. communication between designer and fabricator 2. useful in troubleshooting problems 3. make cost estimations faster and more accurate 4. reduction in waste generation from a particular job What are the differences between sketches and drawings? - correct answer ✔✔drawings: carefully drawn with drawing instruments, for larger more complicated projects, drawn to scale with dimensions and different views sketches: rough outline of object (generally free hand), generally for small and simple objects, not usually drawn to scale used for drawing or measuring angles - correct answer ✔✔protractor allows inclined lines to be drawn of any angle divisibly by 15 - correct answer ✔✔triangles used to draw circles, arcs, and ellipses - correct answer ✔✔compass allows the size of the object to be reduced proportionately - correct answer ✔✔scales to layout 90 degree lines on drawing - correct answer ✔✔T-square left and right-hand edges must be straight so blade of square will form a true right triangle - correct answer ✔✔drawing board used for measuring and transferring distances - correct answer ✔✔dividers to frame drawing, usually 1/2" from edge of paper - correct answer ✔✔border line to show visible edges of drawing - correct answer ✔✔object line to show hidden edges on drawing - correct answer ✔✔hidden line used to indicate the dimension and location - correct answer ✔✔dimension line to indicate a break in the drawing - correct answer ✔✔break line shows centers, typically used for drawing circles - correct answer ✔✔center line used to insert a comment on a drawing - correct answer ✔✔leader line What type of letters should be used on drawings? - correct answer ✔✔capital letters with consistent sizes; keep lettering outside edges of drawing 2-d head-on view of each side of object - correct answer ✔✔orthographic or orthographic projection 3-d view with a vertical axis and the two other axes at 120 degrees from the vertical - correct answer ✔✔isometric pictorial 3-d view with a vertical and horizontal axis and the third axis at an angle to the horizontal - correct answer ✔✔oblique pictorial what lumber size should be used in drawings? - correct answer ✔✔actual size what lumber size should be used when determining a bill of materials? - correct answer ✔✔nominal size characteristic of diamond - correct answer ✔✔hardest Earth mineral what type of abrasive is rarely used for grinding wheels anymore? - correct answer ✔✔natural abrasives what does the type of abrasive on a grinding wheel determine? - correct answer ✔✔the grade of the wheel what are two examples of artificial abrasives for grinding wheels - correct answer ✔✔aluminum oxide and silicon carbon characteristics of aluminum oxide - correct answer ✔✔steel grinding applications characteristics of silicon carbide - correct answer ✔✔nonferrous (e.g. Al) and carbide grinding what does a large grit number/grain size indicate? - correct answer ✔✔larger grit number - smaller particle size what does the grit number represent - correct answer ✔✔the number of pores per inch on sieve what is the scale for size of abrasiveness - correct answer ✔✔0-600 what size of abrasive is used for most general purpose grinding - correct answer ✔✔12-24 what abrasive would be used for sharpening fine-edge tools - correct answer ✔✔100-120 what does the type of bond on a grinding wheel determine - correct answer ✔✔the maximum RPM of the wheel what is a bond on a grinding wheel - correct answer ✔✔the "glue" that holds the grains together type of bond that is used on most wheels, is a mixture of molten clays, glass, or porcelain, is rigid, strong, porous, brittle and cuts fast - correct answer ✔✔vitrified (V) type of bond that has mild cutting action; for sharpening fine-edge tools - correct answer ✔✔silicate (S) type of bond that is resilient, softens under the heat of grinding, and is used for cutoff wheels - correct answer ✔✔Resinoid (B) type of bond that has a smooth cutting action, also used on cut off wheels, similar to resin, and sometimes combined with resin - correct answer ✔✔rubber (R) what is the scale of grades for a grinding wheel - correct answer ✔✔A-Z what is the grade of a grinding wheel - correct answer ✔✔strength at which the bond holds the abrasive grain together what grades of grinding wheels are very soft - correct answer ✔✔A-G what grades of grinding wheels are soft - correct answer ✔✔H-K what grades of grinding wheels are medium - correct answer ✔✔L-O what grades of grinding wheels are hard - correct answer ✔✔P-S what grades of grinding wheels are very hard - correct answer ✔✔T-Z what grade should you choose for a grinding wheel for faster cutting, lower wheel life, worse finish, less chatter, harder metals, rapid stock removal, and large surface contact - correct answer ✔✔softer grade wheel what grade should be sued for slower cutting, longer wheel life, better finish, more chatter, softer metals, slower stock removal, and narrow surface contact? - correct answer ✔✔harder grade wheel which grade wheel should be used when needing cool grinding? - correct answer ✔✔harder grade stone why do you dress a grinding wheel - correct answer ✔✔to maintain balance, reshape straight edge, and remove glaze how do you dress a grinding wheel - correct answer ✔✔use wheel dresser with back and forth movements and check for squareness what tool is #3 on the top 10 list for dangerous tools - correct answer ✔✔angle grinder how do you sharpen convex edges - correct answer ✔✔move tool up and down and side to side to give rounded cutting edge; stop downward motion when sparks appear over cutting edge; complete sharpening on whetstone how do you sharpen knives - correct answer ✔✔use of wetstones or knife sharpening sets; do not use a grinder how do you sharpen concave edges - correct answer ✔✔transfer the curvature of the wheel to the cutting edge; never grind flat side of edge; remove burrs on whetstone how do you reshape a screwdriver - correct answer ✔✔square off edge and sharpen sides what are the two shapes a wood chisel can be - correct answer ✔✔concave to shape of grinding wheel or flat what is the proper length of the bevel on a wood chisel - correct answer ✔✔twice the thickness of the chisel or if too long can be used for cutting soft wood the way molecules are arranged in substance (generally geometrically symetric) - correct answer ✔✔crystal structure the mixing of molten metals - correct answer ✔✔fusion heating medium or high-carbon steel to cherry red and cool it rapidly in water - correct answer ✔✔hardening iron containing up to 2 percent carbon - correct answer ✔✔steel obtaining desired hardness and toughness in a metal - correct answer ✔✔tempering what are the 4 main processes of manufacturing steel - correct answer ✔✔bessemer furnace, open hearth furnace, electric furnace, oxygen furnace what is the effect of adding chromium to steel - correct answer ✔✔makes alloy hard, increases wear resistance, rust resistance, >4% chromium - stainless steels what is the effect of adding sulfur to steel - correct answer ✔✔0.15% to aid in machinability what is the effect of adding silicon to steel - correct answer ✔✔5% to improve electrical, mechanical, and thermal properties what is the effect of adding nickel to steel - correct answer ✔✔8-25%; increases toughness and strength of steel what is the effect of adding vanadium to steel - correct answer ✔✔increases strength of steel what is the effect of adding tungsten to steel - correct answer ✔✔used for tool steels; maintain cutting edge at high heat what is the effect of adding aluminum to steel - correct answer ✔✔provides hardened surface what is the effect of adding molybdenum to steel - correct answer ✔✔increases hardness and endurance, contributes to deep hardening, corrosion resistance what is the effect of adding oxygen to steel - correct answer ✔✔forms rust with iron (iron oxide), not desirable, makes welding difficult what is the effect of adding phosphorous to steel - correct answer ✔✔found in all steels, considered an impurity at > 0.05%; improves machinability what are the four basic metal classifications - correct answer ✔✔ferrous metals, non-ferrous metals, ferrous alloys, non-ferrous alloys main ingredient is iron; pig iron, cast iron, wrought iron, steel - correct answer ✔✔ferrous metals liquid pure iron produced in a blast furnace; so hard and brittle that its almost useless; used to make wrought iron and steel - correct answer ✔✔pig iron made by remelting pig iron and pouring into castings; brittle, greatest resistance to corrosion (of ferrous metals) - correct answer ✔✔cast iron made by mixing pig iron with slag, which contains silicates; slag fibers are distributed throughout, giving high resistance to corrosion and fatigue - correct answer ✔✔wrought iron which of the following is strong, hard, elastic, tough, durable, corrosion resistant, and used in the manufacture of tool steel, springs, cables, axles, shafts, and armor plate? - correct answer ✔✔nickel steel Under which classification would aluminum fall? - correct answer ✔✔non-ferrous metal Which of the following is a brittle, corrosion resistant metal used for galvanizing steel? - correct answer ✔✔zinc Copper and zinc make up which of the following? - correct answer ✔✔brass Under which classification would copper fall? - correct answer ✔✔non-ferrous metal T/F In a drawing of a wooden object, nominal sizes of lumber should not be used. - correct answer ✔✔True T/F Always use lowercase in lettering on drawings and plans. - correct answer ✔✔False T/F The cutting edge on a wood chisel is a double inclined plane with a concave edge. - correct answer ✔✔False Which of the following has the most backing material? - correct answer ✔✔convex edge Which of the following abbreviations would be used to represent a resinoid bond? - correct answer ✔✔B T/F The eye protector on a bench grinder eliminates the need for safety glasses. - correct answer ✔✔False T/F If a burr develops when sharpening a tool with a single cutting edge, the best practice is to turn the tool over and grind lightly on the flat side of the cutting edge to remove the burr. - correct answer ✔✔False T/F It is okay to use water when cleaning metal tools, provided that they are thoroughly dried when complete. - correct answer ✔✔True