For a V-groove weld with backing, the width of the backing strips should be _____

a. 1/2" (13 mm)
b. 1" (25 mm)
c. 1-1/2" (38 mm)
d. 2" (51 mm)


b

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Cartridge fuses used for branch circuit protection must be marked with the ampere rating, voltage rating, and the _____.

a. date manufactured b. dimensions c. expiration d. interrupting rating

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When installing single conductor cables in tray systems with conductors size 4/0 and larger, they must be _____.

a. installed in multiple layers b. installed in a single layer c. spaced one cable diameter apart d. derated according to the number of conductors in the tray

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Redheads are one of our rarest diving ducks, found on many of our larger bodies of water

a. True b. False Indicate whether the statement is true or false

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Which of the following statements is NOT correct?

A) All AB timers are more accurate than mechanical and electronic timers. B) All AB timer instructions operate in nearly an identical fashion. C) The accuracy of PLC timers can be affected by short scan time. D) The TON, TOF and RTO timers are all output instructions.

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