How often should the vacuum pump oil be changed?

What will be an ideal response?


Most vacuum pump manufacturers recommend replacing the oil in the pump after each evacuation.

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A locknut retains the steering wheel to the shaft.

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

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Solve the quadratic equation:   4x + 16 = 3x + 80.

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

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Technician A says that the pistons in an LPG engine are substantially different than that of a typical engine of a gasoline-powered vehicle. Technician B says that LPG engines are built nearly the same as gasoline-powered engines. Who is correct?

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

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A simple capacity-control method that provides capacity steps of 25 percent, 50 percent, and 75 percent using a plug valve would be found on a _____.

a. scroll compressor b. hot-gas bypass setup c. screw compressor d. rotary compressor

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