In an autotransformer starter, what happens when the START button is pressed?
What will be an ideal response?
When the START button is pressed a circuit is completed to the coil of control relay CR, causing all CR contacts to close.
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Una prueba rápida que se puede hacer para determinar si una instalación es buena se conoce como prueba de _____.
a. adecuación b. mantenimiento c. resistencia al aislamiento d. ensayos de acción/inhibición
In acid soils, ____________________ is needed to raise the pH value for efficient production of crops
Fill in the blank(s) with the appropriate word(s).Which range of the electromagnetic spectrum is less susceptible to interference from sources of visible light?
A. Ultraviolet B. Gamma light C. Infrared D. Yellow Light
How is the refrigerant charge normally checked on air conditioning systems that use a fixed orifice expansion device?
A) Feel to see if the suction line is cold and the liquid line warm B) Adjust the charge to achieve a 40°F saturated evaporator temperature C) Subcooling D) Superheat