Some level sensors measure liquid levels, including boundaries between two liquids, using _____.

a. mechanical floats
b. electrical capacitance
c. lasers
d. gas flames


b. electrical capacitance

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The first method of preserving food was probably drying

Indicate whether the statement is true or false

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A welder puts out high amperage, so it needs

a. large electrical cables c. long electrical cables b. small electrical cables d. no electrical cables

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Beginning 1 month from now, Thaxton Mechanical Products will set aside $1500 per month for possibly replacing its corrosion-resistant diaphragm pumps whenever it becomes necessary. The replacement isn’t needed for 3 years. How much will the com­pany have available if the hoped-for rate of return of 18% per year is achieved?

What will be an ideal response?

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A(n) __________ has a positive temperature coefficient.

A. thermistor B. RTD C. thermocouple

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