What thread class is used if rapid assembly and disassembly of a part is required?

a. UNC
b. UNEC
c. UNF
d. UNEF


a. UNC

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A systematic approach known as the_________ has been generally adopted as the standard procedure for conducting research

Fill in the blank(s) with correct word

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Which type tool is designed for cutting only?

A) Diagonal cutters B) Lineman pliers C) Both A and B D) Neither A nor B

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Unbalanced seals have a _____ face loading than balanced seals

a. lower b. higher c. lighter d. more evenly distributed

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Which of the following accurately describes the danger of air in the refrigeration system?

A) The presence of air makes it impossible to connect a vacuum pump, which is necessary to perform the evacuation procedure. B) Too much air makes it impossible to properly calibrate an analog vacuum gauge within the refrigeration system. C) Oxygen may violently react with hydrogen and potentially cause a fire within the refrigeration system. D) Oxygen will chemically react with the refrigeration oil and deposits buildup in the discharge valve area, causing compressor motor burnouts.

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