MCQs in Broadcasting and Cable TV System Part V

(Last Updated On: December 8, 2017)

This is the Multiples Choice Questions Part 5 of the Series in Broadcasting and Cable TV 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.

Online Questions and Answers Topic Outline

• MCQs in Radio Transmitter
• MCQs in AM and FM
• MCQs in Television
• MCQs in Studio (Microphone, Amplifiers, Cameras, Lighting, etc.)
• MCQs in Cable Television

MCQs in Broadcasting and Cable TV System Series

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

Continue Practice Exam Test Questions Part V of the Series

201. One of the following processes or system best describe an example of a pilot tone system normally use in commercial broadcast FM stations.

• a. Time division
• b. Frequency division
• c. Stereo multiplex
• d. QSK

202. What is the maximum transmitting power permitted an amateur station in beacon operation?

• a. 10 W PEP output
• b. 100 W PEP output
• c. 500 W PEP output
• d. 1500 W PEP output

203. What kind of emission would your FM transmitter produce if its microphone failed to work?

• a. An unmodulated carrier
• b. A phase modulated carrier
• c. An amplitude-modulated carrier
• d. A frequency modulated carrier

204. The main function of the RF amplifier in superheterodyne receiver is to

• a. Provide improved tracking
• b. Permits better adjacent channel rejection
• c. Improve the rejection of the image frequency
• d. All of these

205. Local oscillator of a broadcast receiver always tunes to a frequency higher than the incoming frequency in order

• a. To help the image frequency rejection
• b. To allow easy tracking
• c. To allow adequate frequency coverage without switching
• d. All of these

206. What is the first letter symbol for emission of unmodulated carrier?

• a. A
• b. N
• c. H
• d. F

207. International broadcasting (short wave) uses frequency between _____ in accordance with international agreements.

• a. 7012 and 26100 kHz
• b. 6409 and 26100 kHz
• c. 5950 and 26100 kHz
• d. 10950 and 26100 kHz

208. Which of the class station below is a regional channel?

• a. Class I-A
• b. Class II-D
• c. Class III-B
• d. Class IV

209. The permissible power in kW of stations II-A during nighttime is

• a. 0.25 – 50
• b. 10 – 50
• c. 1 – 5
• d. None of these

210. A term applied to third and higher order products, which can greatly degrade the performance of a system

• a. Composite triple beat
• b. Single dual mode
• c. Field strength
• d. Noise

211. A station similar to a translator station in terms of equipment and service area, but is permitted to originate programming from virtually any source

• a. DME
• b. LPTV
• c. HDTV
• d. ITFS

212. MDS means

• a. Multipoint Distribution Service
• b. Multipoint Digital Service
• c. Multipoint Data Standard
• d. Multipoint Drop Standards

213. What is the channel number of an FM station with 88.1 MHz carrier?

• a. 201
• b. 202
• c. 203
• d. 204

214. If an FM station has an effective radiated power of 100 kW then it is under what class?

• a. Class A
• b. Class B
• c. Class C
• d. Class D

215. What is the range of an AM broadcast frequency tolerance above or below its assigned frequency?

• a. 25 kHz
• b. 20 Hz
• c. 60 kHz
• d. 120 kHz

216. What type of emission is produced when amplitude modulated transmitter is modulated by a television signal?

• a. A3F
• b. F3C
• c. F3F
• d. A3C

217. How would you best describe an example of a pilot tone system used in commercial frequency modulation broadcast radio stations?

• a. Frequency simplex
• b. Time division
• c. Stereo multiplex
• d. QSK

218. What type of emission is produced when a frequency modulated transmitter is modulated by a facsimile signal?

• a. A3F
• b. F3F
• c. A3C
• d. F3C

219. What is the highest assigned carrier frequency for standard AM broadcast?

• a. 107 kHz
• b. 535 kHz
• c. 540 kHz
• d. 1600 kHz

220. One of the following refers to the standard frequency band limits of AM broadcast band.

• a. 30 – 300 MHz
• b. 88 – 108 MHz
• c. 3 – 30 MHz
• d. 535 – 1605 kHz

221. What do you call the service area of a standard AM broadcast where fading is not allowed?

• a. Secondary
• b. Tertiary
• c. Primary
• d. Experimental

222. In basic transmitter, ____ is a kind of transmitter that develops type B emission.

• a. Arc
• b. Spark
• c. Alexanderson
• d. High end

223. High speed network as defined by the NTC memorandum circular are network in ICT that have a capacity of at least _______.

• a. 2.048 Mbps
• b. 3.048 Mbps
• c. 20.48 Mbps
• d. 5.05 Mbps

224. Type of radio communication transmission utilizing frequency modulation technique

• a. Television
• b. Broadcasting in 535-1606 kHz
• c. Single side band HF transmission
• d. Television Audio

225. What frequency standard can be used to calibrate the tuning dial of the receiver?

• a. A sweep generator
• b. A deviation meter
• c. A calibrated voltmeter
• d. Signals from WWV and WWVH

226. In stereo FM, a 38 kHz subcarrier is used for the L-R signal. It is derive from a pilot subcarrier of

• a. 9.5 kHz
• b. 38 kHz
• c. 19 kHz
• d. 76 kHz

227. An area characterized to have no interference but with fading or intermittent variations in intensity is ___.

• a. Primary service area
• b. Intermediate service area
• c. Tertiary service area
• d. Secondary service area

228. Where does the FM broadcast band located in the spectrum band?

• a. ELF band
• b. UHF band
• c. HF band
• d. WHF band

229. What is the reason why Frequency modulation is used in the broadcast video recording on tape?

• a. High capacity
• b. Low noise
• c. Compressed bandwidth
• d. Faster recording

230. As part of the KBP Technical Requirement for FM which polarization was not recommended for use?

• a. Horizontal
• b. Vertical
• c. Circular
• d. Elliptical

231. Antenna current, as specified in KBP definitions, is defined as a condition of

• a. No modulation
• b. 80% modulation
• c. 85% modulation
• d. 100% modulation

232. ABS-CBN’s DXAB medium frequency broadcast station operates in …

• a. Luzon
• b. Visaya
• c. Mindanao
• d. Manila

233. International broadcast stations…

• a. Broadcast on shortwave frequencies between 5.95 MHz and 26.1 MHz
• b. Can be operated by both government and private entities
• c. Has transmissions which are intended to be received directly by the general public in foreign countries
• d. Is licensed by the NTC only when operated by private entities

234. Two FM broadcast stations are in Quezon City and another in Manila proper may be authorized to operate with a frequency separation less than 800 kHz.

• a. True
• b. False
• c. Cannot tell
• d. Sometimes

235. For Philippines AM broadcasting, according to standards, the maximum allowed modulation for satisfactory operation

• a. 75%
• b. 85%
• c. 90%
• d. 100%

236. A third symbol radio emission represents telephone transmission including sound broadcasting.

• a. W
• b. F
• c. C
• d. E

237. Which broadcast parameter of the primary FM station is allowed to be changed in the operation of FM broadcast translator?

• a. Frequency
• b. Power
• c. Information content
• d. A and B

238. Input power, as defined by KBP, in the product of the voltage and current at the output of the last radio stage, measured…

• a. At 85 % modulation
• b. Without modulation
• c. At 90% modulation
• d. At 100% modulation

239. In determining an antenna’s height above average terrain (HAAT), how many radial directions from the site are involved in the computation?

• a. 4
• b. 8
• c. 12
• d. 16

240. If DZFE 89.7’s antenna height above average terrain (HAAT) is 190 feet, what is the depression angle of the radio horizon?

• a. 0.17°
• b. 0.21°
• c. 0.27°
• d. 0.31°

241. The method of generating FM used by broadcasting station is

• a. Direct
• b. All of these
• c. Indirect
• d. Insertion

242. The maximum power suggested by KBP on 919-1312 AM broadcast station in Metro Manila

• a. 10 kW
• b. 20 kW
• c. 15 kW
• d. 5 kW

243. Production of radiation by transmitting station

• a. Monitoring
• b. Emission
• c. Radiation
• d. Transmission

244. A form of single emission where the degree of carrier suppression enables the carrier to be reconstituted and be used for demodulation.

• a. Half carrier single sideband emission
• b. Full carrier single sideband emission
• c. Reduced carrier single sideband emission
• d. Double sideband emission

245. When does a broadcast station conduct an equipment test?

• a. During day time
• b. At any time
• c. During night time
• d. During experimental period

246. The lowest resistance grounding on earth.

• a. Sand
• b. Limestone
• c. Surface loam soil
• d. Clay

247. The frequency spectrum of the stereophonic FM signal.

• a. 67 kHz
• b. 59.5 kHz – 74.5 kHz
• c. 19 kHz – 38 kHz
• d. 30 kHz – 53 kHz

248. What is the maximum color TV bandwidth?

• a. 1.6 MHz
• b. 0.5 MHz
• c. 1.5 MHz
• d. 1.3 MHz

249. A beam antenna has a height of 10 meters over a service area. Determine the beam tilt angle.

• a. 0.088°
• b. 8.8°
• c. 9.2°
• d. 0.9°

250. Listing of the date and time of events, programs, equipment, test, malfunctions, and corrections in communication system.

• a. File
• b. Documentation
• c. Reporting
• d. Log

Complete List of MCQs in Communications Engineering per topic