Give two possible causes for a thermoformed part sticking to the mold
What will be an ideal response?
The mold could have an undercut on which the part might be hung-up. The vent holes might be so large or the material so soft when entering the mold that it penetrated into the vent holes and these are holding the part in the mold. The part may have shrunk into a male mold. The draft angles may be too small for easy release. The mold surface may be rough so that the part could have mechanically entrained into the mold surface or the surface may be so smooth that the part is electrostatically attached.
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¿Cuál de las siguientes afirmaciones es verdad en lo que respecta a transformadores de potencial?
a. Sólo se venden de aceite. b. Normalmente el valor nominal de kVA del secundario es superior a los 5 kVA. c. El secundario de un transformador de potencial siempre se conecta a través de las líneas de electricidad principales. d. Son transformadores monofásicos.
A permanent split capacitor (PSC) motor that is running and up to speed will have the start winding ____.
A. energized B. de-energized C. in series with the run winding D. removed from the circuit
What types of systems use staging thermostats?
What will be an ideal response?
When a driver applies the brakes too hard, downshifts too much, or suddenly slows down, _____ can occur.
A. wheel lockup B. a tire slide C. a power skid D. spinning wheels