Name the pozzolanic material commonly used in contemporary construction. Where is it obtained from and in which situations is it used?
What will be an ideal response?
Fly ash, a waste product from coal-burning electric power stations, is a pozzolana. It is used as an admixture in concrete.
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Cuando los vientos son peli- grosamente fuertes, el opera- dor debe _____.
a. dejar la pluma levantada y seguir trabajando b. bajar la pluma todo lo que pueda y apagar el equipo c. girar la grúa de manera que la pluma quede de contra al viento d. levantar más peso para que la grúa no se mueva
When heat gain from any source or sources is more than the body can compensate for by sweating, the result is:
Extension lines are construction lines that are drawn a little heavier than ________ lines and are left on the drawing.
Fill in the blank(s) with the appropriate word(s).
The process by which thermal energy is transferred by a gas is called __________.
A. convection B. conductance C. radiation