The steel wire wheel on a bench grinder can be used to clean ________

A) Aluminum surfaces B) Threads of bolts
C) Both A and B D) Neither A nor B


B

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A mechanical or electrostatic means of placing a velvet-like finish on nearly any surface is called ____.   

A. ?flocking B. ?wood-graining C. ?foiling D. ?cladding

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New plant hybrids have not been developed since the beginning of the 20th century

Indicate whether the statement is true or false

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The electron flow within an electrical circuit is known as ____.

A. voltage B. amperage C. resistance D. wattage

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The light frequency at which light does not pass through a gas is referred to as the __________.

A. blocking frequency B. absorption band

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