External undercut is a gouging out of the piece to be welded, alongside the edge of the _____ surface of the weld.

a. bottom
b. top
c. side
d. internal


b. top

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?Explain what happens on the molecular level when a mixture of acetylene and oxygen is ignited.

What will be an ideal response?

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Cells in the magnum secrete a substance called ____________________, which develops into the white of the egg

Fill in the blank(s) with correct word

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Technician A says that a wet cell, lead acid battery is capable of approximately 30,000 load cycles before it fails. Technician B says that an ultracapacitor (UC) is capable of 1,000,000 load cycles before it fails.  Who is correct?

A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B

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Exactly how many volts are carried by low-voltage lighting systems?

a. 12 c. 20 b. 15 d. 30

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