Why is rubber a good insulator?
What will be an ideal response?
It hasseveral electrons in its outermost shell, making them difficult to free and move from one atom to another.
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El cable tipo _____ es un cable con cubierta no metálica.
a. SIS b. NMS c. SE d. NMSC
Jet pumps can lift water from lower levels than conventional ______ pumps.
Fill in the blank(s) with the appropriate word(s).
A(n) __________ circuit breaker has a trip time that gets faster as the fault current flowing through it gets larger.
a. dual-element b. inverse time c. plug fuse d. type S
What should be done when checking the refrigerant charge of an operating packaged unit?
a. Allow time for the operation of the unit to stabilize. b. Put the unit in economizer mode. c. Open all outdoor air dampers and close the return air dampers. d. Remove the supply air fan access panel.