Practice Quiz in Wire and Wireless Communications System Part 18

This is the Online Practice Quiz in Wire and Wireless Communications System Part 18 as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

Continue Part XVIII of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 171. What is the advantage of electronic ringers? A. Louder volume B. Smaller size C. Good directionality D. Greater weight Question 172. A cellular system is capable of coping with a handoffs once every 2 minutes. What is the maximum cell radius if the system must be capable of working with cars traveling at highway speed of 120 km/hr? A. 3 km B. 1 km C. 4 km D. 6 km Question 173. Termination refers to A. Cutting both ends of a conductor B. Disconnecting a line from a transmitter C. Looking back impedance of a line with no load D. Load connected to the output end of a transmission line Question 174. It is a database that contains information about the identity of mobile equipment that prevents calls from stolen, unauthorized, or defective mobile stations. A. Equipment Identity Register B. Authentication Center C. Home Location Register D. Visitor Location Register Question 175. The central office detects a request for service from a telephone by A. A flow of loop current B. No loop current C. A ringing signal D. Dial pulses Question 176. This is the Nordic analog mobile radio telephone system originally used in Scandinavia A. NMT B. GSM C. PCN D. PCS Question 177. Which exchange is used to connect between central offices when a direct trunk is not available? A. Local B. Tandem C. Toll D. Any of these Question 178. . In the telephone unit, what is produced when the balancing network in a hybrid circuit is intentionally unbalanced slightly so that small amount of transmitted signal is fed to the receiver of the talking phone? A. Dial tone B. Side tone C. Echo D. Singing Question 179. Which component in the telephone set has the primary function of compensating for the local loop length? A. Resistor B. Varistor C. Capacitor D. Induction coil Question 180. Fold-over distortion or aliasing is A. Eliminated by filtering out the frequencies below 300 Hz B. Another name for crosstalk C. The presence of spurious frequencies caused by having too high frequencies in the sampled signal D. None of these

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