____ are used throughout commercial construction to span large distances.
A. Bridges
B. Beams
C. Trusses
D. Struts
Answer: C
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Because of the development of complicated machine tools, hand tools have lost their importance
Indicate whether the statement is true or false
Answer the following statement(s) true (T) or false (F)
1.Schedule 40 rigid polyvinyl chloride (Type PVC) conduit has a smaller inside diameter than Schedule 80 rigid nonmetallic PVC conduit. 2.On a duplex receptacle, the silver screw is used to terminate the white grounded conductor of a 120-volt residential branch circuit. 3.On a GFCI receptacle, the incoming power is connected to the line terminals. 4.Manufacturers of nonmetallic sheathed cable color code a 12/2 Type NM cable with the color orange. 5.A wirenut is the most common wire connector used by electricians to splice together two or more conductors.
How can you lower the temperature at which evaporation takes place?
A) Decrease the pressure on the high side of the pump. B) Reduce the pressure on the low side of the system. C) Add more refrigerant into the pump. D) Raise the pressure on the low side of the pump.
The normal location to provide overcurrent protection in an electrical circuit is _____.
a. at the outlet b. where the conductor receives its supply c. where the conductor terminates d. at the last point in the circuit