3-M's products include a large number of old standbys, but a large percentage of its
revenues also comes from products that did not exist five years ago. 3-M's approach to
things represents a prospector strategy.
Indicate whether the statement is true or false.
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Examples of stress that can predispose fish to diseases are:
A. poor water quality. B. poor feed quality. C. environmental contamination D. all of the above.
________________________ are valves that are used on the compressor and in some cases in the liquid line.
Fill in the blank(s) with the appropriate word(s).
Why are vegetables blanched before they are frozen?
A) To soft-freeze them prior to hard freezing them B) To extend their freshness by killing bacteria and halting enzyme action C) To reduce the amount of energy required to freeze them D) To produce a bright green color and pleasing appearance
Which of the statements below best describes the basic operation of a dual-slope A/D converter?
A) The input voltage is used to set the frequency of a voltage-controlled oscillator (VCO). The VCO quits changing frequency when the input voltage stabilizes. The frequency of the VCO, which is proportional to the analog input voltage, is measured and is displayed on the digital display as a voltage reading. B) A ramp voltage and analog input voltage are applied to a comparator. As the input voltage causes the integrating capacitor to charge, it will at some point equal the ramp voltage. The ramp voltage is measured and displayed on the digital panel meter. C) Two ramps are generated: one by the input voltage and the other by a reference voltage. The input voltage ramp charges the integrating capacitor, while the reference voltage discharges the capacitor and enables the counter until the capacitor is discharged, at which time the counter value is loaded into the output latches. D) A ramp generator is used to enable a counter through a comparator. When the ramp voltage equals the input voltage the counter is latched and then reset. The counter reading is proportional to the input voltage since the ramp is changing at a constant V/second rate.