Were there differences between the water surrounding the rooted plants and
water in the open part of each pond or lake?
What will be an ideal response?
You would expect the shallow water near the rooted plants to be warmer than the
water of the open areas unless you live in a part of North America where the air
temperature is warm during most of the year. In southern Florida, California, and
Texas, the air temperature tends to produce lakes that are permanently stratified
(warmer water on the top and cooler water on the bottom). Thermal stratification
can produce very warm open water areas in a lake. The fish in such a lake will be
confined to the cooler water, which holds more oxygen. The dissolved oxygen and
pH of the water will also vary according to the time of day the samples were taken
(see Figure 17-3 in the lab manual). The dissolved oxygen will vary in different
portions of the lake or pond in relation to the number of aquatic plants, including
algae. Plants tend to increase the oxygen content of the water. The exception arises
when the concentration of algae is so great that they use all the available dissolved
oxygen as rapidly as they produce it.
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Technician A says reducing spark advance can cause spark knock. Technician B says excessive carbon deposits can cause spark knock. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A or B
Match the definition to the correct term.
A. Animals held for breeding to supply pigs for market. B. A male that was castrated before sexual maturity. C. Swine raised for the production of pork. D. An operation that manages large numbers of sows to raise and sell pigs.
What is the fastest method of analog to digital conversion?
A) R/2 ladder B) flash or simultaneous C) converter method D) proportional sampling
This question is not like the ones above. It has the word LEAST. For this question, look for the choice that would LEAST LIKELY cause the described situation. Read the entire question carefully before choosing your answer. An alternator has low output and is being full-fielded to determine the cause. Which of the following is the LEAST likely result of full-fielding the alternator?
a. High battery voltage level b. Battery gassing c. Low battery voltage level d. High alternator amperage output