This is used as a fastening device in combination with a bolt to hold two or more pieces of material together.

a. threaded insert
b. nut
c. washer
d. dowel pin


b. nut

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The number of pulses per second from IGBTs is referred to as:

A) Carrier frequency. B) Hertz modulation. C) Voltage fluctuation. D) Harmonics.

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The general types of commercial control systems include:

A) DC millivoltage, DC microamp loop, and AC frequency modulation. B) Self-contained and remote. C) Electric, electronic, and pneumatic. D) Low-voltage, line voltage, and millivoltage.

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The ____________________ is a number from 0 to 1, with 1 indicating that all the primary flux lines cut the secondary windings and 0 indicating that none of the primary flux lines cut the windings.

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

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The ____________________ bit of the TON instruction is true when the accumulated value equals the preset value, and the rung remains in the true condition.

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

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