A low voltage signal from the O2 sensor indicates:

A. A rich air/fuel mixture
B. A lean air/fuel ratio
C. A stoicheometric air/fuel ratio
D. None of the above


Answer: B

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The most common cause of forklift accidents is _____.

a. a mechanical problem b. a pneumatic problem c. human error d. improper maintenance

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Para lograr la mejor eficiencia de combustible del grupo electrógeno, la carga de funcionamiento debe permanecer, aproximadamente, entre el _____ de la capacidad de kW del generador.

a. 30% y el 60% b. 40% y el 70% c. 50% y el 80% d. 60% y el 90%

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An engine dynamometer may use devices to convert pressure and temperature measurements into electronic signals. These devices are called ________

A) Reversers B) Reducers C) Inverters D) Transducers

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Hard-drawn copper pipe is often bent in the field during system installation.

Answer the following statement true (T) or false (F)

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