____________________ are materials that can convert mechanical energy to electrical energy when pressure is applied or can convert electrical energy to mechanical energy when a voltage is applied.
Fill in the blank(s) with the appropriate word(s).
Crystals
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Which of the following are defined by the NEC® as separate portions of a conduit that provide access through a removable cover to the interior of the system at a junction of two or more sections?
a. Conduit bodies b. Junction boxes c. Pull boxes d. Entrance ells
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In a wedge brake system a pushrod pushes a wedge directly
Air brake
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Joint geometry has two elements to it - shape and _____.?
A. dimensions? B. groove? C. angle? D. face?
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A tunnel diode is often used in a
A) negative resistance oscillator B) forward resistance oscillator C) backward resistance oscillator D) positive resistance oscillator
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