The type of schematic diagram used to describe motor-control circuitry is often referred to as a ladder diagram or ____ ladder logic.
a. internal
b. motor
c. control
d. relay
d. relay
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Resistance of a material to a cyclic load, one that varies in direction and/or magnitude, is called ____.
A. hardness B. fatigue strength C. ductility D. impact strength
¿Qué tipo de aislamiento se instala dentro de hornos o en otros aparatos de alta temperatura?
a. Refractario b. Espuma de poliuretano in situ c. Almohadilla blanda d. Poliestireno
Why did the development of a technology for the mass production of books have an enormous intellectual impact on Europe?
a. New trades and professions emerged, such as typesetters, books sellers, and book peddlers. b. The fixed nature of print made the post-Gutenberg world more intellectually exact. c. Stationers of the medieval university replaced the scriptorium of the medieval monastery as the center of intellectual exchange. d. Latin and Greek replaced the vernacular languages as the primary means of scholarly communication.
When selecting an evaporator for an air conditioning system, the best way to insure that the evaporator will work with the condenser is to:
A) Manufactured the same year. B) The same nominal size in tons as the condensing unit. C) Manufactured by the same manufacturer as the condensing unit. D) Should be an AHRI match for the condensing unit.