What is the difference between a nonselective and a selective herbicide?
What will be an ideal response?
A nonselective herbicide kills all plants that it contacts. A selective herbicide will kill only
certain types of plants
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A ratio of ____ between measurements made with a true RMS ammeter and an average value ammeter indicates no harmonic distortion.
A. 0.5 B. 0.75 C. 0.833 D. 1.0
When evidence of lacquering is found on a set of crankshaft main bearings, which of the following operating and maintenance practices should be examined first?
A. quality of engine lubricating oil B. quality of fuel C. frequency of oil change intervals D. frequency of bearing rollovers
The harmful effects of the expanding cities fell disproportionately on which group?
a. the young b. the poor c. the elderly d. the unmarried
Generally, less than ____ percent error per angle of rotation exists.
A. 1 B. 5 C. 10 D. 25