Explain the difference between a Positive Temperature Coefficient (PTC) thermistor and a Negative Temperature Coefficient (NTC) thermistor.

What will be an ideal response?


The resistance of a PTC increases as the temperature increases.

The resistance of a NTC decreases as the temperature increases.

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Statistics indicate that 25 percent of employee injuries occur within _____ days or fewer of starting on the job.

a. 60 b. 15 c. 90 d. 30

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A micro hybrid or stop-start hybrid has a more robust generator that also acts as a starter. It is known as a(n) ____________________ and is powered by a belt drive attached to the crankshaft.

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

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The doubling time of the world's human population is most nearly:

A) 75 years. B) 100 years. C) 35 years. D) 60 years. E) 20 years.

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Which of the following has the capacity range for a centrifugal compressor?

A) Commercial AC B) Appliance C) Refrigeration D) Residential AC

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