Explain the difference between a flexible duct and a flexible air connector

What will be an ideal response?


A flexible duct must meet all 15 UL 181 tests for flexible duct and may be used in any length. A flexible air connector must meet some, but not all UL 181 tests and is limited to 14 foot lengths.

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When working with gas piping or equipment, technicians should always think of ____________________.

Fill in the blank(s) with the appropriate word(s).

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John Deere invented a plow made from _____

a. wood c. steel b. aluminum d. iron

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GM Class 2 communication toggles between ________

A) 0 and 12 volts B) 7 and 12 volts C) 0 and 7 volts D) 5 and 7 volts

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__________ control has the greatest effect on compensation for unmeasurable disturbances.

A. Feedforward B. Feedback

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