What advantage does the 74HXX series device have over standard TTL?
A) reduced propagation delay B) low power consumption
C) higher propagation delay D) lower voltage requirements
A
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Excessive HC emissions may be caused by all of these, except:
A. ignition system defects. B. vacuum leaks. C. excessively lean or rich air-fuel ratio. D. an EGR valve stuck open.
The amount of core material needed for a particular transformer is determined by the ____ of the transformer.
a. efficiency b. power rating c. relative strength rating d. amount of magnetic coupling between the windings
A vehicle battery is consistently low on voltage. Technician A says to disconnect the battery with the engine running to test for alternator output. Technician B says that a loose alternator belt may cause this problem. Who is right?
A) A only B) B only C) Both A and B D) Neither A nor B
If soil pH was observed to gradually increase and then gradually decrease over a 4-6 year period, what chemical(s) had probably been added to the soil at the start of this period:
a. Aluminum b. An excess of hydrogen ions c. Calcium carbonate d. An ammonium containing nitrogen fertilizer