Heating cable for snow-melting is typically installed in a serpentine pattern with loops spaced at _____.
a. 6 inches (15 cm) on center
b. 1 foot (30 cm) on center
c. 1.5 feet (46 cm) on center
d. 2 feet (61 cm) on center
b. 1 foot (30 cm) on center
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Whatever the shape of the detail and regardless of the number or positions of views, the hidden detail is represented by a hidden edge or a(n) ____.
A. obscured edge line B. recessed edge line C. hidden edge line D. invisible edge line
If you needed a 680 kW±5% resistor, you would look for a resistor with which color code?
A. Blue, gray, yellow, and silver B. Blue, gray, black, and yellow C. Green, gray, orange, and gold D. Blue, gray, yellow, and gold
?How can tungsten be conserved if it accidentally becomes contaminated?
A. ?Break off only the smallest possible piece of the contaminated tungsten. B. ?Strike an arc on a scrap piece of stainless steal and burn off the contamination. C. ?As long as you can keep an arc you can continue welding without stopping to clean the tip. D. ?Carefully grind off the contamination.
Brazil is a good example of a country that has successfully used ethanol to combat a growing energy problem
Indicate whether the statement is true or false