Why is evacuating a refrigeration system is important?
A) Increases in the system high-side pressure and temperature can only be accomplished by proper evacuation.
B) Noncondensable gasses and moisture, the two most common system contaminants, can be removed through evacuation.
C) Evacuation is the only procedure to ensure that noncondensable gasses and moisture are removed from HFC systems with a POE lubricant.
D) Evacuation increases the system head pressure and compression ratio.
B
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Spark plug thread taps may be used to help repair damaged O2 sensor threads.
Answer the following statement true (T) or false (F)
Even though the Force Acts and the Union Army helped suppress the Ku Klux Klan, the secret organization largely achieved its central goal of
A. driving the Union Army out of the South. B. preventing blacks from migrating to the West or North. C. keeping white carpetbaggers from voting. D. intimidating blacks and undermining them politically. E. destroying the Freedmen's Bureau.
Which of the following would occur when lime is added to the surface of a soil at pH 6.0?
A) Earthworms would help move the limestone down into the soil profile. B) The release of H+ ions from the exchange complex would help reduce the soil pH. C) CO2 from root and microbial respiration would quickly solubilize the CaCO3 and increase its rate of downward movement. D) Conservation tillage would increase the pH of the subsoil. E) Aluminum toxicity would increase in the vicinity of the limestone.
The symbol for inductance is ____.
A. H B. I C. J D. L