Technician A says that when performing a J1667 opacity test, the exhaust stack diameter must be correctly entered into the opacitymeter instrument or the results will not be meaningful. Technician B says that the ambient temperature must exceed 35 degrees Fahrenheit (2 degrees Celsius) before a valid J1667 opacity test is undertaken. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
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Disillusioned by war and peace, Americans in the 1920s did all of the following EXCEPT
A. denounce radical foreign ideas. B. condemn un-American lifestyles. C. struggle to achieve economic prosperity. D. shun diplomatic commitments to foreign countries. E. restrict immigration.
Circuit breaker testing requirements are not contained in NFPA 70E.