If a diode is connected in series with the gate, it permits ____ of the AC cycle to provide gate current.
a. only half
b. all
c. some
d. push and pull
a. only half
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Electrical nonmetallic tubing installed in club rooms of assembly occupancies must be concealed in walls, floors, and ceilings that provide a thermal barrier of material with a finish rating of at least _____.
a. 15 minutes b. 20 minutes c. 30 minutes d. 60 minutes
Which of the following is a benefit of FCA welding?
A. FCA requires beveling the plate prior to welding. B. A much lower skill level is required. C. The ability to make 100%-joint-penetrating welds without beveling the edges of the plates. D. Welding thick plates is very easy.
6,337 + 1,977 =
A) 8,304 B) 8,214 C) 8,314 D) 8,324
A large amount of oxygen around flammable materials or sparks can cause _____
a. slow, persistent oxidation of the electrodes b. severe weakening of the root pass welds c. rust or scale to enter the weld puddle d. rapid and uncontrolled combustion