MCQ in Wire and Wireless Communications System Part 5 | ECE Board

This is the Multiples Choice Questions Part 5 of the Series in Wire and Wireless Communications System 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.

MCQ Topic Outline included in ECE Board Exam Syllabi

• MCQ in Mobile Communications
• MCQ in Cellular Communication
• MCQ in Trunk Radio
• MCQ in Radio Paging System
• MCQ in Facsimile
• MCQ in Telephone Set
• MCQ in Signaling
• MCQ in Transmission Considerations in long distance network
• MCQ in Insertion Loss
• MCQ in VF Repeaters
• MCQ in Traffic Calculations
• MCQ in Reference Equivalent and Standards
• MCQ in Telephone Networks
• MCQ in Billing
• MCQ in Network Hierarchy and Class type
• MCQ in Connection and Performance of Wire and Wireless Communications

Continue Practice Exam Test Questions Part 5 of the Series

201. The MTSO searches the location of a mobile phone. This is called ______

a. Handoff

b. Hand on

c. Paging

d. Receiving

202. Mobile cellular transmitter have a maximum output power of

a. 1 mW

b. 10 W

c. 3 W

d. 500 mW

203. A province in the Philippines has an area of 2000 sq km. it has to be covered by cellular mobile telephone service using cells with a radius of 2 km. assuming hexagonal cells, find the number of cell sites needed.

a. 154

b. 144

c. 145

d. 132

204. IS-95 system uses direct sequence spread spectrum with a chipping rate of

a. 1.23 MHz

b. 200 kHz

c. 500 MHz

d. 10.7 MHz

205. Modulation scheme used by cellular CDMA system

a. BPSK

b. QPSK

c. QAM

d. GFSK

206. How often will hand-offs occur when vehicle travels through a CMTS at 100 km per hour speed if the distance between cell sites is 10 km?

a. 6 mins

b. 12 mins

c. 395 sec

d. 10 hrs

207. The TACS base station frequency range of operation

a. 821-849 MHz and 869-894 MHz

b. 890-915 MHz and 935-960 MHz

c. 870-885 MHz and 925-940 MHz

d. 825-890 MHz and 925-970 MHz

208. The antenna separation required in a cellular system when the antenna height at the base is 15 m is

a. 5.477 m

b. 1.364 m

c. 4.869 m

d. 2.434 m

209. What type of modulation is used by a standard analog cordless telephone?

a. AM

b. FM

c. PSK

d. WAM

210. Cellular communication began in

a. 1977

b. 1956

c. 1983

d. 1999

211. When calculating the data rates for LMDS, capacity is the number of cell sites multiplied by which of the following?

a. The capacity per cell site

b. The number of cells

c. The number of sectors in the cell site

d. The sector capacity

212. The name for an alternative form of cellular communication which operates in specialized mobile radio band just adjacent to the cellular frequency band. It is a blend of wireless interconnects and dispatch services which makes it very unique compared to existing cellular and PCS systems

a. iDEN

b. CDMA

c. JTACS

d. PDC

213. The MTSO is responsible for ______.

a. Connecting the cell with the telephone central office

b. Assigning channels for retransmission

c. Billing function

d. All of the above

214. The master control center for a cellular telephone system is the

a. Cell site

b. Mobile telephone switching office

c. Central office

d. Branch office

215. The IS-54 system uses TDMA with three calls per 30 kHz channel. The modulation used is

a. PSK

b. FM

c. DQPSK

d. QAM

216. Which of the following is used to estimate the distance that a subscriber can be located while still achieving acceptable reliability?

a. Call-size selection

b. Link budget

c. Capital cost model

d. Cell design

217. It is a spread spectrum technology that relies on time-division duplexing

a. IS-661

b. IS-136

c. PCS 1900

d. PDC

218. Which of the following is not a 3G system?

a. IMT-2000

b. WCDMA

c. UMTS

d. TDMA IS-136

219. The unlicensed national information infrastructure band

a. 5 GHz

b. 54 GHz

c. 2.4 GHZ

d. 880 MHz

220. Cellular radios use FM with a maximum deviation of plus or minus __

a. 12 kHz

b. 20 kHz

c. 15 kHz

d. 30 kHz

221. IS-136, IS-95 and iDEN belong to

a. 1G

b. 2G

c. 2.5G

d. 3G

222. A wireless data communication service, standard or technology in which data packets are transmitted

a. EDGE

b. GPRS

c. CDMAOne

d. IS-136

223. IEEE standard pertaining to wireless networks

a. 802.6

b. 802.11

c. 802.12

d. 802.15

224. Soft handoff is a flawless handoff which normally takes ___., which is imperceptible to voice telephone users.

a. 300 ms

b. 600 ms

c. 200 ms

d. 500 ms

225. A Bluetooth network can have ___ master(s).

a. One

b. Two

c. Three

d. Eight

226. The GSM system uses the 890- to 915- and 935- to 960-MHz frequency range. There are 124 25 kHz channels spaced 200 kHz intervals. The modulation is ______.

a. GMSK

b. QPSK

c. MSK

d. GFSK

227. Which of the following is not included in the LMDS network management?

a. Fault management

b. Configuration management

c. Accounting management

d. Tower management

228. A ___ is a computerized center that is responsible for connecting calls, recording call information and billing

a. Base station

b. Mobile switching center

c. Cell

d. Mobile station

229. What determine the size of the cell?

a. The area terrain

b. The area population

c. The number of MTSOs

d. All of the above

230. LDMS is an acronym for which of the following?

a. Link multipoint digital service

b. Local multipoint distribution service

c. Low-speed multiple data streams

d. Local multimedia distribution service

231. In ___, a mobile station always communicates with just one base station.

a. Roaming

b. A hard handoff

c. A soft handoff

d. A roaming handoff

232. LDMS optimizes frequency reuses by optimizing which of the following?

a. Minimizing multipathing

b. Cross polarization

c. Sectoring the distribution system

d. All of the above

233. In cellular telephony, a service area is divided into small regions called _____.

a. Cells

b. Cell offices

c. MTSOs

d. Relay sites

234. _______ is a first generation cellular phone system

a. AMPS

b. D-AMPS

c. GSM

d. IS-95

235. ______ is a cellular telephone system popular in Europe.

a. AMPS

b. D-AMPS

c. GSM

d. IS-95

236. IS-95 has a frequency reuse factor of

a. 1

b. 5

c. 7

d. 95

237. ________ base stations use GPS for synchronization.

a. AMPS

b. D-AMPS

c. GSM

d. IS-95

238. NMT is a cellular standard developed by the Nordic countries of Sweden. Denmark, Finland, and Norway in ______.

a. 1983

b. 1989

c. 1981

d. 1980

239. Cellular receiver sensitivity

a. 50 dB

b. 40 dB

c. 20 dB

d. 35 dB

240. When a single cell is subdivided into smaller cells, the process is called

a. Cell division

b. Cell sharing

c. Cell splitting

d. Cell reuse

241. What modulation technique uses digital modulation technique?

a. BPSK

b. QPSK

c. GFSK

d. GMSK

242. Supervisor audio tone frequency

a. 6000 Hz

b. 6010 Hz

c. 5960 Hz

d. 6040 Hz

243. Spacing between the simultaneously used transmit and receive frequencies is

a. 45 MHz

b. 30 kHz

c. 12kHz

d. 200 kHz

244. Each cell site contains a

a. Repeater

b. Control computer

c. Direct link to a branch exchange

d. Touch-tone processor

245. Cellular telephones use what type of operation?

a. Simplex

b. Half-duplex

c. Full-duplex

d. Triplex

246. In a cellular radio, the duplexer is a

a. Ferrite isolator

b. Waveguide assemble

c. Pair of TR/ATR tubes

d. Pair of sharp bandpass filters

247. The output of a cellular radio is controlled by the

a. User or caller

b. Cell site

c. AMPS

d. MTSO

248. What is the system used by Personal Communications Network?

a. PCS 1900

b. Modified GSM

c. AMPS

d. DCS 1800

249. Multiple access scheme used by DECT

a. CDMA

b. FDMA/CDMA

c. TDMA

d. FDMA

250. Voted cellular digital standard at TIA

a. IS-136

b. AMPS

c. PCS 1900

d. PDC

Questions and Answers in Wire and Wireless Communications System Series

Following is the list of multiple choice questions in this brand new series:

Complete List of MCQ in Communications Engineering per topic