On a roof de-icing system, secure cables to each other using _____.
a. black duct tape
b. metal straps
c. UV-resistant cable ties
d. vinyl electrical tape
c. UV-resistant cable ties
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Describe self-clinching fasteners.
What will be an ideal response?
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An R-22 system has a 28-ft lift and a 7 psi pressure drop in the liquid line due to vertical lift. If the liquid leaves the condenser at 244 psi, what is the pressure at the top of the vertical lift?
A) 223 psi B) 230 psi C) 214 psi D) 237 psi
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The type of adhesive that is applied with a dual-chamber applicator is _____
A) contact cement B) epoxy C) mastic D) casein glue
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An example of an application using thermal analysis is:
A. the design of artificial turf B. the design of heat ducts C. the design of bridges D. the design of microchips
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