Technician A says that a wide-band oxygen sensor, also called a lean air-fuel (LAF) sensor, can detect air-fuel ratios from as rich as 10:1 to as lean as 23:1. Technician B says that the oxygen sensor signal determines fuel trim which is used to tailor the air-fuel mixture for the catalytic converter. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician


C

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Which of the following statements is LEAST-Likely true?

A. Block castings can be distorted when heads and main cap bolts are torqued. B. A boring stand is desirable for reboring and honing blocks. C. Cylinders can be up to 0.012" out-of-round when the block is hung from one end on a conventional universal engine stand. D. Boring cylinders with a portable boring bar while the block is mounted to one of these stands can produce oval-shaped cylinders.

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The second stroke of the cycle is the intake stroke

Indicate whether the statement is true or false

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Studies have shown a correlation between high levels of _________ and clogged heart arteries

a. Cholesterol c. Protein b. Carbohydrates d. Glucose

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The truth table for a three-input OR gate contains ________ entries

A) 6 B) 8 C) 3 D) 9

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