Technician A says that J1677 opacity testing of a truck diesel engine in humid weather is not considered to be sufficiently reliable for compliance testing. Technician B says that most opacity meters are only accurate to 10% so retesting of marginal vehicles should be considered. Who is correct?

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


Answer: A

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The flare ____ joints are used in weldments of heavier gauge materials where one or two of the members have a curved shape.

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Indicate whether the statement is true or false

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