Why should service technicians check a system for the presence of sealant before recovering the refrigerant?
A) It can harm the recovery machine
B) It can damage a refrigerant identifier
C) It can contaminate the refrigerant that is stored in the recovery container
D) All of the above
D) All of the above
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The _____, which is shaped like the letter L, is one of the most common types of lintels in use today.
A. concrete block lintel B. angle iron C. bond beam lintel D. reinforced beam
________ is the potential for cells to develop in a particular direction such as forming adventitious roots.
Fill in the blank(s) with the appropriate word(s).
Consider a circuit needing a flow switch with two separate contacts, one normally open and the other normally closed. When one switch changes position, the other switch changes position. What happens if a flow switch with two separate switches cannot be obtained?
What will be an ideal response?
The derivative mode provides a ____ action when the difference between the set point and measured variable is increasing.
A. boost B. braking