You dont have javascript enabled! Please enable it! MCQ in Broadcasting and Cable TV System Part 11 | ECE Board Exam

# MCQ in Broadcasting and Cable TV System Part 11 | ECE Board Exam

This is the Multiples Choice Questions Part 11 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.

#### MCQ Topic Outline included in ECE Board Exam Syllabi

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

### Continue Practice Exam Test Questions Part 11 of the Series

Choose the letter of the best answer in each questions.

501. Which is used in closed-circuit TV?

A. Vidicon

B. Iconoscope

C. Image orthicon

D. Kinescope

Solution:

502. What is the waveform of the sweep voltages?

A. Trapezoidal

B. Sawtooth

C. Trigger

D. Square

Solution:

503. If the pulse peak is 100% modulation, what is the blanking level?

A. 25%

B. 50%

C. 65%

D. 75%

Solution:

504. What device allows one camera to accept pictures from three or more projectors?

A. Film multipliers

B. Film demultiplexers

C. Film multiplexers

D. Film acceptor

Solution:

505. What is the order of scanning four successive motion-picture frames for TV?

A. 3,2,3,2

B. 2,3,2,3

C. 2,2,3,3

D. 3,3,2,2

Solution:

506. From the low-frequency end of a channel, what is the visual carrier frequency?

A. 3.58 MHz

B. 0.25 MHz

C. 1.25 MHz

D. 4.5 MHz

Solution:

507. The circuits make up the front end of a TV receiver, except:

A. RF

B. Mixer

C. IF

D. Oscillator

Solution:

508. What is the impedance at the antenna input terminals of a TV receiver?

A. 300 ohms

B. 150 ohms

C. 50 ohms

D. 100 ohms

Solution:

509. Why are triodes and MOSFETs best for TV RF amplifiers?

A. High power

B. Efficiency

C. Low noise

D. High gain

Solution:

510. In what circuit configuration are triodes and MOSFETs used?

B. Darlington

D. Shunt

Solution:

511. The signal might a video amplifier amplify?

A. Aural IF

B. Video

C. Blanking

D. Any of these

Solution:

512. When coupling from a sync separator, what is used to obtain the horizontal sync pulses?

A. Integrator

B. Corrector

C. Differentiator

D. Separator

Solution:

513. When coupling from a sync separator, what is used to obtain the vertical sync pulses?

A. Integrator

B. Corrector

C. Differentiator

D. Separator

Solution:

514. The type of active device used in horizontal output stages, except:?

A. Vacuum tube

B. FET

C. BJT

D. SCR

Solution:

515. What should be produced by weak blue, weak green, and weak red signals on a color CRT?

A. White

C. Gray

D. Off white

Solution:

516. How many such mirrors are required in a color TV camera?

A. One

B. Two

C. Three

D. Four

Solution:

517. What is the combining circuit called in TV?

A. Combiner

B. Multiplexer

C. Integrator

D. Mixer

Solution:

518. What is the letter symbol for the luminance signal?

A. R

B. Q

C. I

D. Y

Solution:

519. What is the total R + G + B for a Y signal?

A. 0

B. 1

C. 2

D. 1.5

Solution:

520. If a white scene is picked up what is the Y value?

A. 1

B. 2

C. 0

D. 2.5

Solution:

521. If a black scene is being picked up, what is the Y value?

A. One

B. 0.5

C. Zero

D. 1.5

Solution:

522. What circuit does a color killer kill?

A. Bandstop filter

B. High-pass filter

C. Low-pass filter

D. Bandpass filter

Solution:

523. If the blue dot is always at the bottom of a triad, what position must the blue gun always have?

A. Top

B. Left side

C. Right aside

D. Center

Solution:

A. 1

B. 2

C. 3

D. 4

Solution:

A. 1

B. 2

C. 3

D. 4

Solution:

526. What is the frequency tolerance for the RF carrier in the standard AM radio broadcast band?

A. Zero

B. 20 Hz

C. 10 Hz

D. 20 KHz

Solution:

527. The transmitting antenna for an AM broadcast station should have a ________ polarization.

A. Vertical

B. Horizontal

C. Circular

D. Elliptical

Solution:

528. The part of a broadcast day from 6 PM to 6 AM local time

A. Daytime

B. Nighttime

C. Bed time

D. Experimental period

Solution:

529. The service area where the signal is not subject to fading and co-channel interference.

A. Primary Service Area

B. Secondary Service Area

C. Intermittent Service Area

D. Quarternary Service Area

Solution:

530. It is a resistive load used in place of an antenna to test a transmitter under normal loaded condition without actually radiating the transmitterโs output signal.

A. Auxiliary Tx

B. Main Tx

C. Secondary Tx

D. Artificial Antenna

Solution:

531. The operating power of the auxiliary transmitter shall not be less than _____% or never greater than the authorized operating power of the main transmitter.

A. 5

B. 10

C. 15

D. 20

Solution:

532. What are the frequency limits of the MF BC band?

A. 300-3000 kHz

B. 3-30 MHz

C. 535-1605 kHz

D. 88-108 MHz

Solution:

533. The center to center spacing between two adjacent stations in the Phil. AM BC band is _______.

A. 9 kHz

B. 200 kHz

C. 36 kHz

D. 800 kHz

Solution:

534. How many AM stations can be accommodated in a 150-kHz bandwidth if the highest modulating frequency is 10 kHz?

A. 10

B. 15

C. 7

D. 14

Solution:

535. Short wave broadcasting operates in what band?

A. MF

B. HF

C. VHF

D. VLF

Solution:

536. What does the acronym STL stand for?

B. Signal-to-loss-ratio

C. Shout-to-live

Solution:

537. One of the main considerations in the selection of antenna site is (AM)

A. Conductivity of the soil

B. Height of the terrain

C. Elevation of the site

D. Accessibility

Solution:

538. One of the broadcast transmission auxiliary services is:

A. Remote pick-up

B. STL

C. Communication, Coordination and Control

D. All of these

Solution:

539. What is the spacing between any two adjacent channels in the FM broadcast band?

A. 20 KHz

B. 36 KHz

C. 200 KHz

D. 800 KHz

Solution:

540. The first channel in the FM BC band has a center frequency of

A. 88 MHz

B. 88.1 MHz

C. 88.3 MHz

D. 108 MHz

Solution:

541. What is the radio transmission of two separate signals, left, and right, used to create a multidimensional effect on the receiver?

A. SCA

B. Stereo system

C. Pilot transmission

D. Monophonic transmission

Solution:

542. The carrier frequency tolerance for FM broadcasting is ________.

A. 25 kHz

B. 2 kHz

C. 20 kHz

D. 30 kHz

Solution:

543. What is the modulation used by the stereophonic subcarrier?

A. FM

B. PM

C. ISB

D. DSB

Solution:

544. What is the pilot signal for stereo FM?

A. 4.25 MHz

B. 10 kHz

C. 19 KHz

D. 38 KHz

Solution:

545. With stereo FM transmission, does a monaural receiver produce all the sounds that a stereo does?

A. Yes

B. No

C. Either a or b

D. Neither a or b

Solution:

546. Where is de-emphasis added in a stereo FM system?

A. Before the matrix at the TX

B. Before the matrix at the RX

C. After the matrix at the TX

D. After the matrix at the RX

Solution:

547. Where is the pre-emphasis added in a stereo FM system?

A. Before the matrix at the TX

B. Before the matrix at the RX

C. After the matrix at the TX

D. After the matrix at the RX

Solution:

548. The normal frequency for an SCA subcarrier is _________ KHz.

A. 67

B. 76

C. 38

D. 19

Solution:

549. A monaural FM receiver receives only the ________ signal of a stereo multiplex transmission.

A. L + R

B. L โ R

C. Both a & b

D. 67 KHz

Solution:

550. When fed to the stereo FM modulator, in what form are the L โ R signals?

A. AF

B. DSBSC

C. 19 kHz

D. 38 kHz

Solution:

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

MCQ in Broadcasting and Cable TV System
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

P inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. Also provides professionals with materials for their lectures and practice exams. Help me go forward with the same spirit.

โWill you subscribe today via YOUTUBE?โ

Subscribe

• Full Content Access Exclusive to Premium members

## PINOYBIX FREEBIES FOR PREMIUM MEMBERSHIP:

• CIVIL ENGINEERING REVIEWER
• CIVIL SERVICE EXAM REVIEWER
• CRIMINOLOGY REVIEWER
• ELECTRONICS ENGINEERING REVIEWER (ECE/ECT)
• ELECTRICAL ENGINEERING & RME REVIEWER
• FIRE OFFICER EXAMINATION REVIEWER
• LET REVIEWER
• MASTER PLUMBER REVIEWER
• MECHANICAL ENGINEERING REVIEWER
• NAPOLCOM REVIEWER

## FOR A LIMITED TIME

If you subscribe for PREMIUM today!