Concept explainers
Solve for the unknown value in each of the following proportions and check. Round the answers to 3 decimal places where necessary.
a.
b.
c.
d.
e.
f.
g.
h.
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Mathematics For Machine Technology
- Compute the following problems. Express the answers to the nearer whole number. Use C=3.1416DN12 or DN12 for customary units and C=3.1416DN1000 or DN1000 for metric units. What is the surface speed of a 16-inch diameter surface grinder wheel running at1194 rpm?arrow_forwardCompute the following problems. Express the answers to the nearest whole number. Use N=12C3.1416D or 12CD for customary units and N=1000C3.1416D or 1000CD for metric units. An annealed cast iron housing is drilled with a cutting speed of 20 meters per minute using a 22-millimeter diameter carbon steel drill. Find the revolutions per minute.arrow_forwardA reamer tapers 0.130" along a 4.250" length (Figure 216). Set up a proportion and determine length A for each of the following problems. Express the answers to 3 decimal places.arrow_forward
- Find the intensity of light at a depth of 12 meter if I0=14 and k=0.7. Round to two decimals.arrow_forwardCompute the following problems. Express the answers to the nearest whole number. Use N=12C3.1416D or 12CD for customary units and N=1000C3.1416D or 1000CD for metric units. A high-speed steel milling cutter with a 1.750-inch diameter and a cutting speed of 40 feet per minute is used for a roughing operation on an annealed chromium-nickel steel workpiece. Find the revolutions per minute.arrow_forwardA plug gage tapers 3.10 mm along a 38.00 mm length, as shown in Figure 215. Set up a proportion and determine the amount of taper in the workpiece for each of the following problems. Express the answers to 2 decimal places.arrow_forward
- Compute the following problems. Express the answers to the nearer whole number. Use C=3.1416DN12 or DN12 for customary units and C=3.1416DN1000 or DN1000 for metric units. A 312 inch diameter high-speed steel cutter, running at 55 rpm, is used to rough mill a steel casting. What is the Cutting speed?arrow_forwardFind each percentage. Round the answers to 2 decimal places when necessary. a. 15%of60 b. 3% of 42.3 c. 72.8% of 120 d. 0.7% of 812 e. 42.6% of 53.76 f. 130%of212 g. 1212 of32 h. 14 of 627.3arrow_forwardCompute the following problems. Express the answers to the nearest whole number. Use N=12C3.1416D or 12CD for customary units and N=1000C3.1416D or 1000CD for metric units. Determine the revolutions per minute of an aluminum alloy rod 1.250 inches in diameter with a cutting speed of 550 feet per minute.arrow_forward
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