Describe how to use an oscilloscope to take a measurement.

What will be an ideal response?


To use the oscilloscope, set the volts/cm selector switch to its highest setting. Connect the input signal to be observed, and rotate the volts/cm selector switch until the display is approximately two-thirds of the screen's height. Adjust the time-base controls to produce a stable trace and to select the desired number of cycles.

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An ____ is a flat piece of plastic or steel mounted on a pivot above the flywheel.

a. air valve b. air vane c. air plate d. air target

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Technician A says a dial indicator should be used to check tire and wheel lateral runout. Technician B says a dial indicator should be used to check tire and wheel radial runout. Who is correct?

A. A only B. B only C. Both A and B D. Neither A nor B

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Which of the following refrigerant piping techniques help to get oil to flow up a riser in a suction line?

a. Selecting a line size that results in a very low velocity. b. Selecting a line size that is one or two sizes larger than the rest of the line. c. Installing a trap at the bottom of the riser. d. Installing a liquid-to-suction heat exchange

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A mercury (p = 13,500 kg/m3) manometer is used to measure the pressure difference between two tanks containing fluids. The difference in height of the mercury in the two legs is 10 cm. Determine the difference in pressure between the tanks.

Given: p = 13,500 kg/m3; L = 10 cm = 0.10 m Assume: g = 9.81 m/s2 What will be an ideal response?

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