Debris and talc must be blown out of new gas hoses by using _____
a. compressed air
b. oxygen
c. fuel gas
d. inert gas
d
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For resistor failure, possible causes may be ____.
a. wrong heater; relay in high ambient b. abrasive dust; very heavy duty; no lubrication c. overcurrent; moisture; corrosive atmospheres d. abrasive dust; dirty oil; water in tank
In hand-set multicomponent decks, joists normally _____.
a. are laid across the stringers b. are fabricated from aluminum c. support the stringers d. are spaced a minimum of 10' apart
What is the correct formula for the design of outdoor steps?
a. 2T + R = 26" c. T + 2R = 26" b. T + 2R = 52" d. 2T + R = 52"
Welders must maintain a short arc when welding stainless steel to limit atmospheric contamination, which
causes _____. a. corrosion b. flexibility c. hardness d. porosity