# MCQs in Broadcasting and Cable TV System Part X

Compiled MCQs in Broadcasting and Cable TV System Part 10 of the series as one topic in Electronic System and Technologies (Communications Engineering) in the ECE Board Exam.

This is the Multiples Choice Questions Part 10 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 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:

Broadcasting and Cable TV System MCQs
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: PART VII
PART 8: MCQs from Number 351 – 400                 Answer key: PART VIII
PART 9: MCQs from Number 401 – 450                 Answer key: PART IX
PART 10: MCQs from Number 451 – 500                 Answer key: PART X

### Continue Practice Exam Test Questions Part X of the Series

451. What are the frequency limits of the standard AM broadcast band?

• A. 565 to 1605 kHz
• B. 535 to 1605 kHz
• C. 575 to 1615 kHz
• D. 535 to 1615 kHz

452. What is the width of an AM broadcast channel?

• A. 30 kHz
• B. 25 kHz
• C. 15 kHz
• D. 200 kHz

453. The following are designations of service areas of AM broadcast station, except:

• A. Primary
• B. Secondary
• C. Tertiary
• D. Intermittent

454. The following are parts of the AM broadcast day, except:

• A. Daytime
• B. Night time
• C. Mid-day
• D. Experimental period

455. Why is it desirable to have broadcast antennas on marshy land?

• A. For better reflection
• B. For ground wave radiation
• C. For greater absorption
• D. For sky wave propagation

456. What is another name for a console pot?

• A. Attenuator
• B. Gain control
• D. Any of these

457. The highest peaks of modulation in AM should be held between what two percentages?

• A. 85 - 100%
• B. 65 - 70%
• C. 50 - 75%
• D. 75 - 90%

458. What is the name of the second transmitter used when a station operates 24 hours a day?

• A. Alternate
• B. Reserve
• C. Spare
• D. Diversity

459. What is a combo operator?

• A. Announcer
• B. Disk jockey
• C. Engineer
• D. All of these

460. What term is used to indicate intercom operation in a broadcast station?

• A. Communication
• B. Talk-back
• C. Respond
• D. Remote talk

461. What does a red light glowing in a studio indicate?

• A. Off the air
• B. Floating
• C. Experimental
• D. On the air

462. What is the attenuator which controls the the output of the program amplifier called?

• A. Master gain control
• B. Auxiliary gain control
• C. Reserve frequency control
• D. Auxiliary frequency control

463. The following are important operational requirements during a broadcast, except:

• A. Timing
• B. Modulation
• C. Fidelity
• D. AF amplitude

464. What are the names of two unbalanced pads used in broadcasting?

• A. T and L
• B. K and P
• C. R and I
• D. H and L

465. What is the advantage of using balanced lines in audio systems?

• B. Improve fidelity
• C. Reduce noise pickup
• D. Improve carrier level

• A. Better energy conversion
• B. Better attenuation
• C. Match impedance better
• D. Any of these

467. What device is used to make up for the high-frequency losses in long AF lines?

• A. Signal booster
• B. Noise suppressor
• C. Line equalizer
• D. Compander

468. What is another term meaning “operating power”

• B. Sideband power
• C. Audio power
• D. Harmonic power

469. What does maximum rated carrier power referred to?

• A. Buffer amplifier power rating
• B. Intermediate amplifier power rating
• C. Speech amplifier power rating
• D. Final-amplifier power rating

470. When are equipment tests made?

• A. Mid-day
• B. Daytime
• C. Night time
• D. Experimental period

471. What is the maximum allowable distortion at 80% modulation?

• A. 3%
• B. 4%
• C. 5%
• D. 6%

• A. Omnidirectional antennas
• B. Directive antennas
• C. High gain antennas
• D. Any of these

473. Within what limits must the antenna current ratios of a directional antenna be held?

• A. 3%
• B. 5%
• C. 4%
• D. 1%

474. What monitor is required at the operating position in a broadcast station?

• A. Frequency
• B. Modulation
• C. Fidelity
• D. Carrier

475. What monitor may also give an indication of carrier amplitude regulation?

• A. Modulation
• B. Carrier
• C. Fidelity
• D. Frequency

476. What device can give the most accurate instantaneous peak-of-modulation indications?

• A. Spectrum analyzer
• B. Fourier analyzer
• C. CRT oscilloscope
• D. Frequency probe

477. The item required in program log?

• A. Identification
• B. Program description
• C. Sponsors and network name
• D. All of these

478. The item required in an operating log?

• A. Antenna power and programs on-off
• B. EBS tests
• C. Antenna lights and meter readings
• D. Any of these

479. The item required in a maintenance log?

• A. Meter replacements
• B. Antenna current checks
• C.  Light inspection and experimental period operation
• D. Any of these

480. What is the minimum time broadcast station logs must be held?

• A. One year
• B. Two years
• C. Three years
• D. Five years

481. What class operator has no restrictions on technical work in a broadcast station?

• A. 1st phone
• B. 2nd phone
• C. 3rd phone
• D. 4th phone

482. What classes of operators are restricted on technical work in a broadcast station?

• A. 3rd phone
• B. 2nd phone
• C. 4th phone
• D. 2nd and 3rd phone

483. If improper transmitter indications are given at the remote-control point, what should be done?

• A. First phone operator to transmitter
• B. Second phone operator to transmitter
• C. Third phone operator to transmitter
• D. Fourth phone to transmitter

• A. Quarter of an hour
• B. Half an hour
• C. On the hour
• D. On the day

485. Where must station license be posted?

• A. Tower
• B. Modulators
• C. Transmitter

486. Where operator licenses must be posted?

• A. Operating desk
• B. Operating position
• C. Operating console
• D. Anywhere

487. What device is usually used today to measure the frequency of a broadcast station?

• A. Multivibrators
• B. Counter
• C. Ripper
• D. Wave meter

488. What does EBS stand for?

• C. Electronic Base Station
• D. Emergency Base Station

489. How often must EBS tests be made?

• A. Weekly
• B. Daily
• C. Monthly
• D. Yearly

490. What must non-EBS station have?

• A. EBS signal monitor
• B. EAN signal monitor
• C. EAT signal monitor
• D. CPCS signal monitor

491. What stylus material is used in broadcast station?

• A. Ruby
• B. Gamet
• C. Emerald
• D. Diamond

492. What advantage is there to having heavy turntables?

• A. Constant speed
• B. Less vibration
• C. Rumble
• D. All of these

493. What is the width of recording tapes?

• A. 0.5 inch
• B. 0.75 inch
• C. 0.125 inch
• D. 1 inch

494. What frequency is used to erase tapes?

• A. Supersonic
• B. Subsonic
• C. Ultrasonic
• D. Infrasonic

495. What tape speed produces highest fidelity of audio?

• A. 20 in/sec
• B. 15 in/sec
• C. 10 in/sec
• D. 5 in /sec

496. What should be used to clean recording heads?

• A. Methanol
• B. Ethyl Alcohol
• C. Isopropyl alcohol
• D. Rubbing alcohol

497. What impedance is usually used with broadcast microphones?

• A. All of these
• B. 150 ohms
• C. 250 ohms
• D. 600 ohms

498. In what log is antenna-light information entered?

• A. Maintenance log
• B. Program log
• C. Operating log
• D. Logging log

499. What was the name of the first TV camera tube?

• A. Vidicon
• B. Iconoscope
• C. Image orthicon
• D. Kinescope

500. Which camera tube requires electron multipliers?

• A. Vidicon
• B. Iconoscope
• C. Image orthicon
• D. Kinescope

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

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