
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 VII of the Series
301. A class C FM station has an authorized power not exceeding ______watts of ERP.
- a. 500
- b. 750
- c. 1000
- d. 2000
302. The assembly around the neck of a picture tube that produces the magnetic fields that deflect and scan the electron beams is called the _________.
- a. shadow mask
- b. phosphor
- c. electron gun
- d. yoke
303. An odd number of lines per frame form part of every one of the world’s TV systems. This is _____________________.
- a. done to assist interface
- b. purely an accident
- c. to ensure that line and frame frequencies can be obtained from the same original source
- d. done to minimize interference with the chroma subcarrier
304. The difference between the sound carrier and the color signal is
- a. 4.5 MHz
- b. 1.25 MHz
- c. 0.92 MHz
- d. 0.25 MHz
305. In color television, it is made for uniform color in the raster.
- a. beam-landing adjustment
- b. degaussing
- c. internal blanking adjustment
- d. background control
306. Which of the following camera tubes uses lead oxide for the photoconductive target plate?
- a. vidicon
- b. plumbicon
- c. saticon
- d. image orthicon
307. The number of fields is ______ per frame.
- a. 2
- b. 60
- c. 525
- d. 262.5
308. An RF carrier wave that is frequency – modulated by the baseband audio signal in TV broadcasting.
- a. Audio signal
- b. Video signal
- c. Intercarrier signal
- d. Color signal
309. A class B FM station is limited in antenna height of ____ feet.
- a. 1000
- b. 500
- c. 250
- d. 100
310. The HV anode supply for the picture tube of a TV receiver is generated in the
- a. mains transformer
- b. vertical output stage
- c. horizontal output stage
- d. horizontal deflection oscillator
311. A tap for the subscriber drop line has a
- a. high insertion loss
- b. high tap loss
- c. low tap loss
- d. 300-ohm impedance
312. Which system can be used for both recording and playback?
- a. CED
- b. VHD
- c. laser disk
- d. VHS
313. The hue 180 degrees out of phase with red is ______.
- a. cyan
- b. yellow
- c. green
- d. blue
314. It is used around the phosphor dots to make a darker black which improves contrast in the picture.
- a. black masking
- b. convergence adjustment
- c. shadow masking
- d. color parity adjustment
315. A lens with lower f rating is _____ lens that allows more light input.
- a. slower
- b. wider
- c. narrower
- d. faster
316. Picture frames are repeated at the rate of ___ per second.
- a. 30
- b. 60
- c. 45
- d. 50
317. The effective radiated power of a class A FM station should not exceed ______ kW.
- a. 125
- b. 30
- c. 10
- d. 1
318. In television, 4:3 represents the
- a. interface ratio
- b. maximum horizontal deflection
- c. aspect ratio
- d. ration of the two diagonals
319. Titling the video head gaps is necessary with the
- a. color under
- b. zero guard bands
- c. FM luminance signal
- d. Long – play tapes
320. It is a special camera tube with a test pattern printed in the image plate.
- a. vidicon
- b. monoscope
- c. oscilloscope
- d. iconoscope
321. The number of lines scanned per frame in the raster on the picture tube screen is
- a. 525
- b. 262 ½
- c. 20
- d. 10
322. One of the following is a high powered RF ac basic transmitter that has two or more stages, the oscillator stage which determines the frequency of operation and RF amplifier stage or stages that develop the high power output. The purpose of which is to develop a good frequency stability.
- a. MOPA
- b. Hartley
- c. Alexanderson
- d. Goldsmith
323. Camera signal output without sync is called ______.
- a. black burst
- b. generator lock video
- c. composite video
- d. non-composite video
324. The tint of the color is its _____.
- a. brightness
- b. contrast
- c. chroma
- d. hue
325. Which frequency band is the standard AM radio broadcast?
- a. HF
- b. UHF
- c. MF
- d. VHF
326. The I and Q composite color signals are multiplexed onto the picture carrier by modulating a 3.58 MHz subcarrier using
- a. FM
- b. PM
- c. DSB AM
- d. Vestigial sideband AM
327. The shadow mask in color picture tube is used to
- a. Reduce X-ray emission
- b. Ensure that each beam hits only its dots
- c. Increase screen brightness
- d. Provide degaussing for the screen
328. The video heads rotate at high velocity to increase the
- a. tape speed
- b. writing speed
- c. reel rotation
- d. tape tension
329. How do you eliminate radio frequency variation of an oscillator transmitter caused by its supply voltage?
- a. use of a regulated power supply
- b. use of a new power supply
- c. use of high capacitor in the supply circuit
- d. loosen power supply shielding
330. The composite video signal includes the camera signal with the following except
- a. picture information
- b. sync pulses
- c. blanking pulses
- d. camera signal
331. A lens has an 8-cm focal length and 4-cm diameter. Its f rating is
- a. 2
- b. 4
- c. 8
- d. 32
332. Which of the following is a possible cause for an abrupt frequency variation in a self – excited transmitter oscillator circuits resulting poor frequency stability to hold a constant frequency oscillation?
- a. DC and RF AC heating of resistor which cause a change in values
- b. Heating and expansion of oscillator coil
- c. Heating of capacitor in the oscillator
- d. Power supply voltage changes
333. How long does it take to scan 2 picture elements when 400 are scanned in 50 microseconds?
- a. 25 microsec
- b. 0.25 microsec
- c. 2.5 microsec
- d. 0.5 microsec
334. Anode voltage for the picture tube, developed from the output of the horizontal deflection circuit.
- a. Yoke voltage
- b. Flyback voltage
- c. Aquadag voltage
- d. Tube voltage
335. The channel spacing in the Philippine FM broadcast standards
- a. 400 kHz
- b. 800 kHz
- c. 600 kHz
- d. 200 kHz
336. What is the black-and-white or monochrome brightness signal in TV called?
- a. RGB
- b. Color subcarrier
- c. Q an I
- d. Luminance Y
337. Which of the following is a midband cable TV channel?
- a. 6
- b. 7
- c. 14
- d. 23
338. What is the primary purpose of an RF amplifier in a receiver?
- a. to vary the receiver image rejection by utilizing the AGC
- b. to provide most of the receiver gain
- c. to develop the AGC voltage
- d. to improve the receiver’s noise figure
339. The color with the most luminance is
- a. red
- b. yellow
- c. green
- d. blue
340. It is the light flux intercepted by a one-foot-square surface that is one-foot from a one-candlepower source.
- a. candela
- b. footcandle
- c. lux
- d. lumens
341. Refers to the possible cause of an abrupt frequency variations in a self-excited transmitter oscillator circuit resulting to a poor frequency stability to hold a constant oscillator.
- a. poor soldered connections
- b. heating of capacitor in the oscillator
- c. DC and AC heating of resistors which cause change in values
- d. Aging which cause change in condition in parts characteristics
342. It is the difference in intensity between the black parts and white parts of the picture.
- a. brightness
- b. hue
- c. contrast
- d. illumination
343. The stereophonic subcarrier suppression level in the Philippines standards
- a. less than 4% modulation of the main carrier
- b. less than 3% modulation of the main carrier
- c. less than 2% modulation of the main carrier
- d. less than 1% modulation of the main carrier
344. The sound IF in a TV receiver is
- a. 4.5 MHz
- b. 10.7 MHz
- c. 41.25 MHz
- d. 45.75 MHz
345. The circuit the separates sync pulse from the composite video waveforms is
- a. the keyed AGC amplifier
- b. a clipper
- c. an integrator
- d. a differentiator
346. In the CED system, the disk capacitance varies with the
- a. pit depth
- b. disk size
- c. speed of rotation
- d. wavelength of the scanning light
347. The final power amplifier in an FM transmitter usually operates class ______.
- a. AB
- b. C
- c. B
- d. A
348. In a picture tube, it is the total angle that the beam can be deflected without touching the sides of the envelope.
- a. screen angle
- b. tube angle
- c. picture angle
- d. deflection angle
349. It is necessary to time the scanning with respect to picture information
- a. flyback
- b. synchronization
- c. blanking
- d. scanning
350. The intermediate frequency used in for FM broadcasting Philippine standards.
- a. 455 kHz
- b. 10.7 MHz
- c. 11.4 MHz
- d. 12.5 MHz
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