PLCs are programmed by combining various instructions to form a(n) ____________________ control circuit.
Fill in the blank(s) with the appropriate word(s).
logical
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Briefly define the terms volumetric efficiency and thermal efficiency.
What will be an ideal response?
Capillarity in soils ________
A) involves both adhesion and cohesion B) is not involved in the process of water uptake from soils C) is independent of the matric potential in soils D) is enhanced by the symmetrical nature of the water molecule E) does not account for unsaturated water movement in soils
What is the approximate ventilation requirement for low-temperature, air-cooled condensing units located in indoors?
A) 400 CFM per 1,000 BTU B) 465 CFM per 1,000 BTU C) 200 CFM per 1,000 BTU D) 165 CFM per 1,000 BTU
Equipment grounding conductors may have to be sized larger than given in Table 250.122 for which of the following reasons?
(1) The conductor is not capable of withstanding the available short-circuit current. (2) The circuit conductors are increased in size. A. Reason (1) only B. Reason (2) only C. Both reasons (1) and (2) D. Neither reasons (1) nor (2)