Which of the following statements about converting a system from one refrigerant to another is incorrect?
a. Synthetic and mineral oils are completely compatible.
b. A new metering device may be required.
c. Equipment capacity may change with the new refrigerant.
d. Gaskets and O-rings may have to be changed.
a
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The most common kind of landfill is the ____ landfill
A) trench fill B) at-grade C) canyon fill D) multigrade
A movable datum target symbol is used to indicate that the datum target is not fixed at its basic location and is free to translate.
Answer the following statement true (T) or false (F)
In the worldwide youthful protests of 1968, the movement in ____ succeeded in toppling the government, while the movement in ____ ended in harsh repression and failure.
A. the United States; France B. Poland; France C. Germany; Britain D. France; Czechoslovakia E. Japan; the United States
The correct lighting procedure for an oxyacetylene torch is:
A) Crack both the acetylene and oxygen and light the mixture. B) Crack the oxygen and light it first, then add the acetylene. C) Crack the acetylene and light it first, then add the oxygen. D) Fully open both the acetylene and oxygen, wait 30 seconds, and then light the mixture.