A(n) ____ flame has a balance of fuel gas and oxygen. It is the most commonly used flame because it adds nothing to the weld metal.
A. neutral
B. carburizing
C. acetylene
D. oxidizing
Answer: A
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A two-stage refrigeration system uses two refrigeration systems to produce low temperatures.
Answer the following statement true (T) or false (F)
Fiber optic cable functions due to a phenomenon called ________
A) total internal refraction B) absorption C) dispersion D) total internal reflection
?____ refer(s) to a system of numbers along the top and bottom margins of a sheet and letters along the left and right margins of a sheet.
A. ?Scales B. ?Zoning C. ?Standards D. ?Modifiers
Which BMS control computer front-end software function operates to provide system operators with information about monthly trends in system temperatures and pressures or energy usage?
a. Operator management b. Graphical interface c. Database management d. Data collection