Which of the following would be considered one of the permittivities of a dielectric material?

A. Gallium
B. Copper
C. Air
D. Silicon


C

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Which of the following is not a persona that occupies a learning role?

A. Experimenter B. Anthropologist C. Director D. Cross-pollinator

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Medium carbon steel has ____ % carbon content.

A. 0.30 B. 0.30 to 0.50 C. 30 D. 30 to 50

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Why are positive shutoff devices used when removing gauge manifold sets from Schrader valves?

A) To prevent post-removal refrigerant venting B) To restart the system for installation C) To reduce the release of refrigerants D) To automatically loosen Schrader valves

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The elastomer bellows spring has a _____ that fits over the shaft and pushes against the elastomer bellows

A) secondary seal face B) metal bellows C) special fitted collar D) single-coil spring

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