What function does the sample-and-hold circuit perform in a PCM system?

A. Encoder
B. Modulator
C. Filter
D. Decoder


B

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____ materials cure during manufacture and can only be bonded to themselves with an adhesive.

A. Thermoplastic B. Styrene-butadiene-styrene C. Atactic polypropylene D. Thermoset

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A cold frame with a heat source is called a:

a. hot frame c. hotbed b. warm house d. warming shed

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Which state has lost the most acres of wetlands?

a. Indiana b. Kentucky c. California d. Texas

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Which system prevents gasoline vapors from venting into the atmosphere?

A) EVAP B) EGR C) HO2S D) PCV

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