The length of the threaded area of a spark plug is called its ____.

A. heat range
B. reach
C. trigger
D. dwell


Answer: B

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A cylindricity tolerance is a geometric tolerance that defines the ____________________ permitted on a cylindrical surface.

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

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How many digits are there in an IQCC code?

A. two B. four C. six D. eight

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Photoperiodic means that the plants respond to the length of day

Indicate whether the statement is true or false

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Hybridization is generally a better technique than mass selection for cross-pollinated species

Indicate whether the statement is true or false

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