Practice Quiz in Wire and Wireless Communications System Part 45

This is the Online Practice Quiz in Wire and Wireless Communications System Part 45 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 XLV of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 441. A signal that is sent from the switching machine back to the calling station whenever the called telephone number is off-hook. A. dial tone signal B. . ringback signal C. busy signal D. off-hook signal Question 442. Occurs in coherent SSBSC systems, such as those using frequency division multiplexing when the received carrier is not reinserted with the exact phase relationship to the received signal as the transmit carrier possessed. A. phase delay distortion B. phase jitter distortion C. phase intercept distortion D. All of these Question 443. Range of speech power A. 100 – 1000 µW B. 10 – 100 µW C. 10 – 1000 µW D. 1000 – 10000 µW Question 444. The connection between the subscriber and his own particular central office. A. trunk B. line C. signaling D. pulsing Question 445. When the image at the receiving end of a facsimile transmission is elongated vertically, A. the transmitter IOC is less than the receiver IOC B. the transmitter IOC is greater than the receiver IOC C. the transmitter IOC is equal to the receiver IOC D. the IOC is not a factor Question 446. It is similar to the local loop except that it is used to interconnect two telephone offices. A. trunk lines B. subscriber loop C. local lines D. subscriber lines Question 447. A smaller version of the feeder cable containing less wire pairs. A. aerial B. drop wire C. feeder cable D. distribution cable Question 448. Category of signaling message that indicates a request of service, such as going off-hook or ringing in the destination telephone. A. dial tone B. signaling C. supervising D. alerting Question 449. The reference frequency of a typical voice-band circuit is typically around _________. A. 1500 Hz B. 1300 Hz C. 1700 Hz D. 1800 Hz Question 450. The time delay encountered by a signal as it propagates from a source to a destination is called ____________. A. propagation time B. phase delay C. holding time D. system delay time

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