What is the difference between a primary and a secondary refrigerant?
What will be an ideal response?
A primary refrigerant will be used to remove heat from a secondary refrigerant in a chiller unit. The secondary refrigerant does not change state and expand when it removes heat from the air.
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The most commonly used strength of concrete for the slab-on-ground in concrete tilt-up wall buildings is _______.
A) 6,000 psi. B) 5,000 psi. C) 4,000 psi. D) 3,000 psi. E) 2,000 psi.
Nondestructive testing symbols may be:
A) Arrow side B) Other side C) No side significance D) All of the above
Infectious plant diseases are caused by different pathogens including ________, ________, ________, ________, and ________.
Fill in the blank(s) with the appropriate word(s).
Five basic functions must be performed in the operation of small business to move a product or service from the supplier to the consumer
Indicate whether the statement is true or false