Sensor switches used on doors and windows are normally _____ and form one continuous series circuit.

a. closed
b. open
c. blocked
d. marked


a. closed

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Cows can be implanted with _____________________ that have been genetically altered to possess a gene that produces a certain drug through the mammary gland

Fill in the blank(s) with correct word

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Answer the following statement(s) true (T) or false (F)

Vinyl siding should not be nailed tightly to the wall sheathing.

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Electric current that regularly reverses flow is called:

A) Alternating current. B) Direct current. C) Ellipsoidal current. D) Potential current.

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Sourcing PLC modules refer to __________ current flow.

A. electron B. conventional

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