How does the refrigerant charge affect a system's subcooling?
A) The refrigerant charge does not affect the system subcooling.
B) Adjusting the refrigerant charge only affects the subcooling if the refrigerant is added on the high side.
C) Removing refrigerant increases the system subcooling.
D) Adding refrigerant increases the system subcooling.
D
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Small plasma cutting machines can do many of the same cutting jobs that are done with an oxyacetylene torch, but without the expense of renting gas cylinders.
Answer the following statement true (T) or false (F)
?What is the name of a triangle that has two sides that are the same and two angles that are the same?
A. right triangle B. ?equilateral triangle C. ?isosceles triangle D. ?None of the above
The voltage between the "stinger" leg of a delta transformer and ground is:
A) 240 V. B) 277 V. C) 120 V. D) 208 V.
A duty cycle is the percentage of a 10-minute period during which a welding machine can continuously _____
a. maintain a constant voltage as the output current varies b. produce a constant current over a wide voltage range c. produce its rated amperage without overheating d. establish an arc between the end of the wire electrode and the workpiece