Why would a welder store welding electrodes in an oven?
A) To keep them out of bad weather
B) To hide them from other welders
C) To prevent moisture absorption
D) To keep them warm
E) None of the above
C
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FCA welding guns are available as two types: water-cooled or ____________________.
Fill in the blank(s) with the appropriate word(s).
One key difference between mineral wool and fiberglass is _____.
a. only fiberglass can be referred to as "mineral wool" b. only fiberglass can be used for high-temperature applications c. only mineral wool can prevent fires d. only mineral wool is available in higher densities
La altura máxima de un conjunto de escalones sin descansillo es, por lo general, de _____ pies.
a. 9 (2.7 m) b. 10 (3 m) c. 12 (3.7 m) d. 15 (4.6 m)
If the resonant frequency is 1 MHz and Q = 50, f1 = ________ and f2 = ________
A) 0.99 MHz, 1.01 MHz B) 0.99 MHz, 1.02 MHz C) 0.98 MHz, 1.01 MHz D) 0.98 MHz, 1.02 MHz