Which of the following categories of circuits or systems is required to be grounded?
A. Circuits for electric cranes operating over combustible fibers in Class III locations
B. Circuits in critical care areas of health care facilities
C. Circuits for equipment within the electrolytic cell working zone in aluminum refineries
D. Secondary circuits of 30-volt lighting systems
B. Circuits in critical care areas of health care facilities
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When masonry units are laid or stacked directly over one another with the head joints in plumb vertical position, it is called _____ .
A. stack-over-stack B. stack design C. jack work D. jack-over-jack
An example of a cool season turfgrass is zoysia grass
Indicate whether the statement is true or false
In binomial nomenclature, the second part of the name identifies the ____________________
Fill in the blank(s) with correct word
When charging systems with zeotropic refrigerants, such as R410A, the refrigerant must leave the refrigerant cylinder:
A) As a liquid-vapor mixture. B) As a liquid. C) As a vapor. D) Under a pressure of at least 100 psig.