The best method of holding an driving an end mill is:
A) A solid holder B) A Jacob's chuck C) A split collet D) All of the above
A
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Answer the following statement(s) true (T) or false (F)
1. The use of a projected tolerance zone permits the use of the largest position tolerance while eliminating the risk of orientation deviation creating an interference condition. 2. A functional gage can be used to verify the projected tolerance zone. 3. A multiple single-segment position tolerance is often used where the function of a part requires a looser tolerance for the deviations of spacing and orientation of a hole pattern. 4. A composite position tolerance can only be applied to patterns of features of size. 5. A position tolerance may not be applied to irregular features of size, such as elongated holes.
Cells that go through periods of inactivity are said to be ____________
Fill in the blank(s) with correct word
You are asked to calculate ?H when 0.1 kg of steam is heated at a constant pressure of 0.1 MPa from 373.15 K to 423.15 K. You remember learning that the heat capacity of water is about 4.19 kJ/kg•K, so you multiply 0.1 kg by 50 K by 4.19 kJ/kg•K and get an answer of 20,950 joules. Which of the following is the best assessment of your answer?
A. Your calculation is accurate, but you should round the answer to 21,000 joules, since your heat capacity only had three significant figures and 20,950 joules has four. B. This is a reasonable estimate of ?H, but it would have been more accurate to use the data in the steam tables than to use MCP?T. C. This is a reasonable estimate of ?H, but it assumes CP is constant with respect to temperature. You can get a more accurate answer by accounting for the temperature dependence of CP. D. This is not a reasonable estimate of ?H. 4.19 kJ/kg•K is a heat capacity of liquid water and you cannot assume water vapor has the same heat capacity. E. This is not a reasonable estimate of ?H. You should have used CP* = (5/2)R.
A screw that can make its own threads when installed is called a ________ screw
A) Sheet metal B) Tapered C) Self-tapping D) Both A and C