The most important aspect of a lathe tool is:
A) The tool geometry, including end, side relief and rake angles
B) When they get overheated in the cut, they are ruined and must be replaced
C) The ability to be shaped into desired form
D) The fact that they can be re-sharpened when they wear or break
A
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Which of the following statements is accurate?
An ammonia synthesis process works as follows: Fresh feed air and hydrogen are combined with a recycle stream and the combined stream is compressed to 10 MPa. The compressed stream enters a reactor, and a fraction of the entering nitrogen and hydrogen are converted into ammonia. The reactor effluent, still at 10 MPa, enters a condenser. The liquid and vapor streams leaving the condenser are in VLE. The liquid stream, which is almost pure ammonia, is the product. A fraction of the vapor stream leaving the condenser is purged, while the rest is recycled. A. Raoult’s Law would be a reasonable way to model the VLE for ammonia in the condenser. B. Henry’s Law would be a reasonable way to model the VLE for oxygen in the condenser. C. If we increase the size of the reactor, allowing a larger fraction of the nitrogen and hydrogen to be converted to ammonia, it won’t lead to an increase in the liquid product flow rate, because the product flow rate is limited by the equilibrium constraint in the condenser. D. If we maintain the same flow rate of entering feeds, but we purge a smaller fraction of the vapor leaving the condenser, then the mole fraction of oxygen in the purge stream will go down. E. None of the above are true.
Do contracts have to be written by lawyers or could they be written by engineering or construction professionals? Explain why or why not
What will be an ideal response?
There are many methods of insulating metal ductwork. Which of the following methods is NOT used to insulate ducts?
A) Bubble outer wrap or liner B) Spray-on urethane foam C) Fiberglass outerwrap with vapor barrier D) Fiberglass liner
Tech A says the axle bearings that are pressed into the axle housing have the bearing cone pressed onto the axle shaft. Tech B says some of the axle bearings that are pressed onto the axle shaft have the outer race pressed into the axle housing. who is correct.
A. a only B. b only C. both a and b D. neither A nor B