The oil in a vacuum pump should be changed _____.
a. about every five minutes of pump operation
b. only when changing from one refrigerant to another
c. during or immediately after pumping down
c. during or immediately after pumping down
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Name the two settings that help create customer desire
What will be an ideal response?
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Forces in pneumatic and hydraulic systems are usually ____.
A. nonexistent B. very high C. very low D. electrical
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____ examination is one of the most extensively used inspection practices.
A. Ultrasound B. Radiographic C. Visual D. Dye penetrant
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Answer the following statement(s) true (T) or false (F)
Manual push button line voltage starters are manufactured with two or three line voltage contacts.
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