Which of the following refrigerants has the lowest ozone depletion potential (ODP) rating?

A. R-134a
B. R-22
C. R-12
D. R-422D


Answer: D

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With suitable examples, explain the differences between connection-oriented and connectionless protocols.

What will be an ideal response?

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A set of burned or pitted contacts can cause a(n) ____________________ across the contacts.

Fill in the blank(s) with the appropriate word(s).

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____________________ are energy sources created from organic materials that come from renewable sources such as agriculture crops

Fill in the blank(s) with correct word

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The relationship for the impedance matching ratio (RL/Rpri) in a transformer is:

A) opposite to the turns ratio (Nsec/Npri) squared. B) opposite to the turns ratio (Nsec/Npri). C) equal to the turns ratio (Nsec/Npri). D) equal to the turns ratio (Nsec/Npri) squared.

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