Which of the following is a use for superheated steam?
A. Driving furnaces
B. Catalytic cracking
C. Product quality improvement
D. Maintenance of steam pressures and temperatures over short distances
A. Incorrect. Superheated steam can be used for driving turbines.
B. Correct. Superheated steam can be used for catalytic cracking.
C. Incorrect. Superheated steam can be used for product stripping.
D. Incorrect. Superheated steam can be used for maintenance of steam pressures and temperatures over long distances.
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Todas las camas de pacientes de zonas de cuidados intensivos deben tener como mínimo _____ receptáculos.
a. dos b. cuatro c. seis d. ocho
Historians critical of the captains of industry and capitalism in the post-Civil War era generally concede that class-based protest
A. was a more galvanizing and more violent phenomenon among the lower classes in the United States than it was in Europe. B. was less than in Europe because of America's greater level of social mobility. C. was dampened by the fact large numbers of Americans in post-Civil War era made small improvements in their economic and social status. D. was diluted by differences in social mobility, according to race and ethnicity. E. All of these choices are correct.
An air conditioning system charged with R-410A is operating with a suction pressure of 130 psig which equates to a 45°F saturation temperature. If the manufacturer calls for a 15°F superheat, what should the suction line temperature be?
A) 45°F + 15°F = 60°F suction line temperature B) 45°F - 15°F = 30°F suction line temperature C) 130 psig + 15°F = 190°F suction line temperature D) 130 psig - 15°F = 115°F suction line temperature
How should a thermostat be connected to a system that has two transformers: one in the furnace and one in the air conditioner?
A) Wire the furnace to RC and the air conditioner to RH. B) Tie the transformers together and leave off the R terminal. C) Wire the furnace to RH and the air conditioner to RC. D) Wire both transformers to the R terminal.