List six indoor air pollutants.

What will be an ideal response?


pipe insulation, aerosol sprays, radon gas, automobile exhaust, dust mites, carpets, drapes, cigarette smoke, household cleaners, fireplaces, paint

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Todas las máquinas roscadoras de tubos tienen _____, que sostienen y giran el tubo.

a. prensas giratorias b. impulsoras de trinquete (o freno) c. portabrocas (o mandril) d. dientes

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What is the average life span of a companion rabbit?

What will be an ideal response?

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If you keep stretching a material it will eventually get to a point where it will no longer return to its original shape when the tension is released. This stage is called the ____ limit.

A. ultimate B. tensile C. failure D. elastic

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What is the purpose of a wheel bearing?

A) Reduce friction B) Transfer weight C) Both A and B D) Neither A nor B

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