Give the term used to define a helix or conical spiral formed on the external surface of a shaft or internal surface of a cylindrical hole.
What will be an ideal response?
Screw threads.
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One important difference between fiberglass board insulation and duct wrap is that board insulation is _____.
a. sold in rolls b. rigid or semi-rigid c. used in cryogenic applications d. used in refractory applications
The capacitor consists of two aluminum plates with an insulator between them.
Answer the following statement true (T) or false (F)
The opposition to the flow of current is called ________
A) capacitance B) voltage C) resistance D) current
A normally operating water-cooled condenser is operating with a 10° differential between water in and water out. If scale forms on the water tubes and the entering water is 85°F, which of the following is possible?
A. The outlet water will be 88°F. B. The system head pressure will rise. C. The water regulating valve will close. D. Both a and b are correct.