Which of the following statements is NOT correct?
A) The physical wires between the input and output field devices and the PLC input and output modules are the only signal wires required in the PLC system.
B) Outputs can be paralleled on the same rung.
C) The cost and size of PLCs have increased significantly in the last 10 years.
D) If a problem in a PLC module occurs, the module can be changed in a matter of minutes without any changes in wiring.
C
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You have 790 acres of rice that you can combine at the rate of 8.5 acres per hour, using 1.2 gallons of diesel fuel per acre with a regular header. If you change the header to a stripper header, you can combine the 790 acres of rice in 3/ /4 of the time using 0.9 gallon of diesel fuel per acre. Diesel fuel sells for $3.18 per gallon.
a. How many hours does it take to combine the rice with the regular header? b. How many hours does it take to combine the rice with the stripper header? c. How much was saved on diesel fuel using the stripper header?
Which is not a classification of a flow sensor?
A) Deflection B) Mass C) Distance D) Differential E) Displacement
What should the minimum voltage be while using a commercial battery load tester on a battery that is approximately 40°F (4.4°C)?
A. 9.6 volts B. 9.5 volts C. 9.4 volts D. 9.3 volts
More complex trim shapes and greater quantities of trim are typically used in buildings _____
a. used for commercial purposes b. of traditional design c. in the northeastern states d. of contemporary design