Male cattalo were almost always _____.
Fill in the blank(s) with the appropriate word(s).
sterile
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The ____ is a filler metal that is fused into the root of the joint and becomes a part of the weld.
A. insert B. consumed insert C. sacrificial insert D. consumable insert
Which of the following is an NEC® requirement for grounding and bonding?
a. The path to ground from circuits, equipment, and metal enclosures shall be continuous. b. The path to ground from circuits, equipment, and metal enclosures shall have sufficiently high impedance to facilitate the operation of protective devices. c. The path to ground from circuits, equipment, and metal enclosures shall rely on the earth as an effective ground fault current path. d. The path to ground from circuits, equipment, and metal enclosures shall be capable of safely carrying twice the maximum current of the system.
Many hot water systems eliminate the need for storage tanks by using _____.
a. backflow preventers b. tankless heaters c. water softeners d. recirculating pumps
What makes a material a good electrical conductor?
A) A large number of free electrons B) Having very few electrons C) Having a large number of free protons D) Having eight electrons in the outer shell