The less difficult it is to enter the task environment of an industry, the higher are the barriers
to entry to this environment.
Indicate whether the statement is true or false.
F
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Artificial insemination technicians typically have ____________________ years of college education
Fill in the blank(s) with correct word
Coolant drained from the cooling system when replacing a thermostat or water pump should be ________
A) Disposed of properly or recycled B) Reused C) Filtered and reinstalled after the repair D) Poured down a toilet
Which of the following tasks is NOT implemented, when adding the IIN, ION, IIM and IOM instructions in the development of ladder logic?
A) Interrupt the scan process and input or move a data word immediately. B) Interrupt the scan process and complete all arithmetic expression immediately. C) Interrupt the scan process and move only the masked portion of a data word immediately. D) Move field device data to the input image table without waiting for the scan cycle to reach the image table update point.
Which of the following describes the basic operation of a single-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) 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. D) Any of the above could be correct, depending on the specific type of A/D converter involved.