Transformer cores are made from laminated iron to reduce losses
Indicate whether the statement is true or false
TRUE
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When Europeans owned or invested in private companies in the United States, they generally
A. appointed European managers to key positions in the company. B. let Americans manage the business unless there was an economic crisis. C. made American banks issue regular reports on the profitability of their companies. D. steered most of the profits back into European investments. E. insisted that the companies hire a portion of immigrants from the nation owning the company.
Runlevel ____ shuts the system down.
A. 0 B. 1 C. 5 D. 6
The purpose of the trap in a condensate drain is to:
A) Ensure that some water is always standing in the evaporator drain pan. B) Offset the negative pressure on the drain, which can prevent the water from draining. C) Keep snakes and insects from crawling up the drain into the coil. D) Provide a place for coil slime to collect so that is can be easily cleaned out.
What is one time constant for a 10 mH inductor connected in series with a 47 k? resistor?
A) 0.213 ?S B) 470 mS C) 213 ?S D) 470 S