En el caso de los conductos con un ancho de más de ___ pulgadas (___ cm), separe una hilera de sujetadores cada 18 pulgadas (45 cm) en el medio del conducto.

a. 6
b. 12
c. 18
d. 24


d. 24

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Portland cement is a _____ cement, which means that it sets and hardens by a chemical reaction with water.

A. hydraulic B. natural C. hydrated D. lime-sand

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A soil high in _____ content will feel smooth

A) clay B) sand C) silt D) rock

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Which of these is an animal protein commonly used in livestock feed?

a. blood meal c. whole milk b. protein derived from rendering d. all answers

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A circuit that has one SCR in it can ________

A) control DC voltage B) control AC voltage C) control both AC and DC voltage

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