La pluma sólo debe elevarse después de _____.

a. que se haya levantado el pórtico o el mástil
b. que se hayan levantado las eslingas
c. que se haya levantado un gancho
d. que se haya levantado un cable para levantar cargas


a. que se haya levantado el pórtico o el mástil

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Which of the following is a three-phase transformer connection requiring only two transformers?

a. open wye b. open delta c. closed delta d. closed wye

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The ____________________ of seam welds is designated as the minimum acceptable shear strength in pounds per linear inch.

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

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E-diesel is diesel fuel with what additive?

A) Methanol B) Sulfur C) Vegetable oil D) Ethanol

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Adjustable wrenches are as strong as standard open-end wrenches.

Answer the following statement true (T) or false (F)

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