Hot water is circulated through a hot water heating system:
A) Using water circulating pumps.
B) Using large diaphragm pumps.
C) Using external-drive water compressors.
D) Because of the density difference between hot and cold water.
A
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Una tira angosta de madera vertical de 2 × 4 que se coloca sobre el revestimiento de una columna a modo de refuerzo se conoce como _____.
a. riostra b. listón c. tablón de estabilidad d. puente de andamio
Which of the following are fire prevention strategies?
A. Place oily rags and other combustible waste materials in metal bins or dumpsters. B. Keep portable heaters away from flammable or combustible materials. C. Do not overload circuits. D. All of the above.
Antifreeze performs three very important functions within the cooling system. Which of the following is not a function?
A. Lowers the freezing point of the coolant B. Increases the boiling point of the coolant with an ant boiling agent C. Protects and lubricates the components of the cooling system D. Doubles the boiling point of the coolant mixture
The DN bit of the TOF instruction becomes true as the rung __________.
A. changes from a true-to-false condition B. becomes true