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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