IME 258 - Unit test 2 Test is closed book, closed notes and of 20 min duration J
ID: 286333 • Letter: I
Question
IME 258 - Unit test 2 Test is closed book, closed notes and of 20 min duration Jossz:the size from which tolerances are mcasured C 2. -Leur 3. /-:bow closely amcasarement co s to the true value 4.-saproporty that is very small or Itmited for brittle matonals · 4. If a shear pin of diameter 0.505" uransmits a force of $000 lb in single shear, the shear stress on the pin is.aloow .nits ( !h ) (mF/Area). 5. A student weighing 137,5 lb runs up a 10 foot high light of stairs in 10 seconds. What is spot power esated by her?(power-free lHP-550 filss) 7561 6. Are gages suitable for mass peoduction? Why or why not? y 0) 7. If cylindrical workpioce of diameter 2" makes one full turn past a stationary tool cutting its outcer surface moves one circumference past the tool and this is the lengh cut fom the work piece. What is the length cut if the workpicce makes 400 tans? S. (a)Name an applicatioe in manufacturing where a very low density material is better. (1) 9. What is wrong with reporting the hardness of a knife blade as having a hardness of 58? 10. Bonus question: How does a Vemicr scale on a caliper work to make it easy to read changes in dimension as small as 0.001"7 If the main and Vemier scales both have 25 divisions and 25 divisions of the main scale cover 2.5". what is the length of the 25 divisions on the Vemier scale?Explanation / Answer
1. Basic size
Actual size is the measured size or the reasult of measurement study. Basic size (also nominal size) is the size in relation towhich all limits of size are fixed. It is the size with reference to which the limits of size are fixed.
2. Accuracy
Accuracy represents degree of correctness of a measurement. When applied to the measurement process, accuracy is referred to as measurement accuracy. The accuracy of the measurement equipment can be used as an indicator to determine how accurate the results will be.
3. Tensile strength.
Brittle materials, which comprise cast iron, glass, and stone, are characterized by the fact that rupture occurs without any noticeable prior change in the rate of elongation. Thus, for brittle materials, there is no difference between the ultimate strength and the breaking strength. Also, the strain at the time of rupture is much smaller for brittle than for ductile materials.