Which of the following is true about the ZigBee standard?
A. designed to support mesh networking
B. replaced an existing global, open standard
C. used for larger data transfers than Bluetooth
D. operates in the 5.0 and 6.5 GHz ISM bands
Answer: A
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Answer the following statement(s) true (T) or false (F)
1. Plug-in relays are designed for multiple switching applications at or above 240 V. 2. The normal state of a switch shows the contact configuration when the device is being acted upon by an external force. 3. Standards have been developed that specify certain colors in push-button switch operators for particular functions. For example, in the machine tool industry, green means “Start Motors, Cycle Start, Initiate Motion.” 4. Multiple contacts may be connected to a single selector switch (SSW). 5. The 120 VAC circuit is normally protected by a single fuse or circuit breaker.
4,618 + 7,307 + 255 =? ?
A. ?11,170 B. ?11,925 C. ?12,170 D. ?12,180
Which of the following contains a delicate network of collagen and elastin fibers through which cerebrospinal fluid circulates?
A) epidural space B) dural sinus C) arachnoid villi D) subarachnoid space E) pia mater
A sum-of-product expression is equal to 1 when one or more of the product terms is
A) followed by an AND gate. B) equal to 1. C) inverted. D) equal to 0.