Cavitation in a water control valve can be caused by
A) installing the control upstream of the coil instead of downstream
B) extremely low pressure drop through the valve
C) installing the control downstream of the coil instead of upstream
D) excessively high pressure drop through the valve
D
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An example of a location in a dwelling where a receptacle must have GFCI protection is a _____.
a. garage b. finished basement c. when the receptacle is dedicated to a burglar alarm d. crawl space above grade level
List and explain three common elements in drafting.
What will be an ideal response?
A sheet metal enclosure must be not less than _____ thick if a machine screw type fastener of the 10-32 size is used to connect an equipment grounding conductor to the enclosure.
A. 1/32 in. B. 1/16 in. C. 3/32 in. D. 1/8 in.
Before measurements can be taken using a temporary benchmark, you must calculate the _____
a. height above sea level b. backsight distance c. height of instrument d. target location