Engineering, 07.12.2020 16:10 mainsc0324
A compound die is used to blank and punch a large washer out of 6061ST aluminum alloy
sheet stock 3.2 mm thick. The outside diameter of the washer is 25.0 mm, and the inside diameter
is 12.0 mm. Determine the punch and die sizes for (a) the blanking operation, and (b) the punching
operation
Answers: 2
Engineering, 04.07.2019 18:10
During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false
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Engineering, 04.07.2019 18:10
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
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Engineering, 04.07.2019 18:10
Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa
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Engineering, 04.07.2019 19:10
The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object
Answers: 1
A compound die is used to blank and punch a large washer out of 6061ST aluminum alloy
sheet stock 3...
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