?In a tumbling-barrel process, the smoothing agent is a(n) ____ and a lubricant.
A. ?abrasive
B. ?wax
C. ?epoxy
D. ?ash
Answer: A
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What feature of some prefabricated PVC fitting jacket covers can reduce costs to the manufacturer and user?
a. Making all the covers in a single color b. Making all the covers in a single size c. Making the covers so they can stretch d. Making the covers with stepped ends
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Can changes in atmospheric pressure affect refrigeration gauge pressure readings?
A) Atmospheric pressure changes can affect high pressure gauge readings, but not compound gauge readings. B) Atmospheric pressure changes can affect compound gauge readings, but not high pressure gauge readings. C) Changes in atmospheric pressure can affect the final reading by changing the calibration point of the gauges. D) Since refrigeration systems are closed to the atmosphere, atmospheric pressure has no affect on refrigeration gauge pressure readings.
On a winder stairway, the winder tread width at a point 12" from the narrower end of the winders must be
_____. a. at least 9" b. two-thirds the tread width in the straight portion of the stairway c. 10"-12" d. equal to the tread width in the straight portion of the stairway