Technician A says that a wide-band oxygen sensor, also called a lean air-fuel (LAF), 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 is NOT a component of an automatic temperature control system?
A) Electrically operated actuators B) Control head C) Temperature sensors D) All of these are components of an automatic temperature control system
You reseeded your hayfield with a 2-part clover and 5-part fescue mix. You bought 20 pounds of clover. How many pounds of fescue are needed?
What will be an ideal response?
For the MACRS method of depreciation, identify (a) the six standardized recovery periods for personal property, (b) the two recovery periods for real property, (c) the assumed salvage value for personal property, and (d ) the default recovery period for an asset not in a stated GDS class.
What will be an ideal response?
Which type of duct system has the longest life expectancy?
A. galvanized metal B. fiberglass-wrapped, spiral duct (flexible duct) C. fiberglass, fiberboard sheeting D. round sheet metal