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# 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 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

Solution:

202. Mobile cellular transmitter have a maximum output power of

a. 1 mW

b. 10 W

c. 3 W

d. 500 mW

Solution:

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

Solution:

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

Solution:

205. Modulation scheme used by cellular CDMA system

a. BPSK

b. QPSK

c. QAM

d. GFSK

Solution:

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

Solution:

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

Solution:

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

Solution:

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

a. AM

b. FM

c. PSK

d. WAM

Solution:

210. Cellular communication began in

a. 1977

b. 1956

c. 1983

d. 1999

Solution:

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

Solution:

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

Solution:

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

Solution:

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

Solution:

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

Solution:

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

c. Capital cost model

d. Cell design

Solution:

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

a. IS-661

b. IS-136

c. PCS 1900

d. PDC

Solution:

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

a. IMT-2000

b. WCDMA

c. UMTS

d. TDMA IS-136

Solution:

219. The unlicensed national information infrastructure band

a. 5 GHz

b. 54 GHz

c. 2.4 GHZ

d. 880 MHz

Solution:

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

Solution:

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

a. 1G

b. 2G

c. 2.5G

d. 3G

Solution:

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

a. EDGE

b. GPRS

c. CDMAOne

d. IS-136

Solution:

223. IEEE standard pertaining to wireless networks

a. 802.6

b. 802.11

c. 802.12

d. 802.15

Solution:

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

Solution:

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

a. One

b. Two

c. Three

d. Eight

Solution:

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

Solution:

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

Solution:

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

Solution:

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

Solution:

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

b. Local multipoint distribution service

c. Low-speed multiple data streams

d. Local multimedia distribution service

Solution:

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

Solution:

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

Solution:

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

a. Cells

b. Cell offices

c. MTSOs

d. Relay sites

Solution:

234. _______ is a first generation cellular phone system

a. AMPS

b. D-AMPS

c. GSM

d. IS-95

Solution:

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

a. AMPS

b. D-AMPS

c. GSM

d. IS-95

Solution:

236. IS-95 has a frequency reuse factor of

a. 1

b. 5

c. 7

d. 95

Solution:

237. ________ base stations use GPS for synchronization.

a. AMPS

b. D-AMPS

c. GSM

d. IS-95

Solution:

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

Solution:

a. 50 dB

b. 40 dB

c. 20 dB

d. 35 dB

Solution:

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

Solution:

241. What modulation technique uses digital modulation technique?

a. BPSK

b. QPSK

c. GFSK

d. GMSK

Solution:

242. Supervisor audio tone frequency

a. 6000 Hz

b. 6010 Hz

c. 5960 Hz

d. 6040 Hz

Solution:

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

a. 45 MHz

b. 30 kHz

c. 12kHz

d. 200 kHz

Solution:

244. Each cell site contains a

a. Repeater

b. Control computer

c. Direct link to a branch exchange

d. Touch-tone processor

Solution:

245. Cellular telephones use what type of operation?

a. Simplex

b. Half-duplex

c. Full-duplex

d. Triplex

Solution:

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

Solution:

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

a. User or caller

b. Cell site

c. AMPS

d. MTSO

Solution:

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

a. PCS 1900

b. Modified GSM

c. AMPS

d. DCS 1800

Solution:

249. Multiple access scheme used by DECT

a. CDMA

b. FDMA/CDMA

c. TDMA

d. FDMA

Solution:

250. Voted cellular digital standard at TIA

a. IS-136

b. AMPS

c. PCS 1900

d. PDC

Solution:

#### Questions and Answers in Wire and Wireless Communications System Series

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

MCQ in Wire and Wireless Communications
PART 1: MCQ from Number 1 โ 50                                 Answer key: PART 1
PART 2: MCQ from Number 51 โ 100                            Answer key: PART 2
PART 3: MCQ from Number 101 โ 150                          Answer key: PART 3
PART 4: MCQ from Number 151 โ 200                          Answer key: PART 4
PART 5: MCQ from Number 201 โ 250                          Answer key: PART 5
PART 6: MCQ from Number 251 โ 300                          Answer key: PART 6
PART 7: MCQ from Number 301 โ 350                          Answer key: PART 7
PART 8: MCQ from Number 351 โ 400                          Answer key: PART 8
PART 9: MCQ from Number 401 โ 450                          Answer key: PART 9
PART 10: MCQ from Number 451 โ 500                        Answer key: PART 10

### Complete List of MCQ in Communications Engineering per topic

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