Describe what to do if burn-through occurs.

What will be an ideal response?

If a burn-through occurs, the welder can be pulsed off and on so that the hole can be filled. This process will leave a larger than usual buildup. Excessive buildup could be ground off if necessary as part of the postweld cleanup.

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Choose the statement that describes "visual observer".

A. Any trained crew member who consults the video screen of the control station.
B. A trained crew member assisting the pilot during the flight.
C. The person conducting the inspection of the flight site before the operation.
D. A person present at the scene observing the flight operation.

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El/la _____ se usa para conectar empalmes, esquinas y divisiones que están en ángulo recto respecto a un muro.

a. cabezal b. travesaño superior c. travesaño superior doble d. zapata

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A trap in the condensate line prevents ____.

A. air from being drawn up into unit from the end of the drain B. foreign particles from being pulled into the condenser C. the pump turning on if the float fails D. Both a and b.

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The parallel combination of a 330 ? resistor and a 470 ? resistor is connected in series with the parallel combination of four 1 k? resistors. If a 100 V source is connected across the circuit, then which resistor drops the most voltage?

A) 1 k? B) 470 ? C) 330 ?

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