Después de que se ha colocado la primera descarga de concreto para una losa, las descargas siguientes deben colocarse _____.
a. lejos del concreto que ya
está ubicado
b. en varias pilas separadas, y
luego moverse para llenar la
forma por completo
c. en el talón del concreto que
ya está ubicado
b. en una pila grande, y luego
moverse para llenar la forma
por completo
Answer: C
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a. 3/8" b. 3/4" c. 1" d. 1-1/4"
Who was the person that was instrumental in developing the first CFCs?
What will be an ideal response?
Zone control is accomplished in hydronic systems using thermostats that activate
A) a zone control valve for each zone B) a zone compressor for each zone C) a zone boiler for each zone D) a zone damper for each zone
A compressor may not be able to start if _____
a. the high- and low-side pressures are equalized b. the high- and low-side pressures are not equalized c. a fan motor is running d. the crankcase heater is on