Which of the following statements about a linear air-fuel (LAF) sensor is NOT true?
A. The linear air-fuel sensor is located at the outlet of the three-way catalyst.
B. Within the sensor, there is an exhaust flow chamber, an atmosphere reference chamber, and a diffusion chamber, plus a heater circuit that allows the sensor to work when the engine is cold.
C. Positive voltage indicates a lean mixture and negative voltage indicates a rich mixture.
D. The normal operating voltage range is about 1.5 volts.
A. The linear air-fuel sensor is located at the outlet of the three-way catalyst.
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The 2's-complement method of subtracting +2810 from -6710 produces a signed binary and decimal difference of:
A) 11011111, -9510 B) 11011111, +9510 C) 01011111, -9510 D) 01011111, +9510
Chromium vanadium steels are best known for hardness and strength.
Answer the following statement true (T) or false (F)
Which of these statements about backing a heavy vehicle is true?
a. It is safer to back toward the right side of the vehicle than toward the driver's side. b. Helpers should be out of the driver's sight and use only voice (spoken) signals to communicate with the driver. c. You should avoid backing whenever you can. d. All of the above are true.
A mechanic receives a commission of 7% on parts sold to customers. A customer spends $76.00 on parts. What is the mechanic's commission?
A. $4.32 B. $5.32 C. $6.32 D. $7.32