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Audio Video Engineering MCQs set -4

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1. Which of the following microphone have an integrated circuit (IC) that replaces the JFET in a conventional in an electret condenser microphone resulting in a fully digital output of the electret microphone?




2. Which of the following is also called reverse transducer?




3. What is expressed as the ratio of output sound power to the input audio (electrical power) in loudspeaker?




4. What is expressed as the ratio of ‘signal output’ to the ‘output in the absence of signal’?




5. What is the unit for directivity in loudspeaker?




6. On which principle is the moving-coil loudspeaker based?




7. What is the equation for the force in newton on the coil due to interaction between current through the coil and magnitude field?




8. Which magnetic material is the magnet in the moving coil loudspeaker made up of?




9. What is attached to the coil of moving coil loudspeaker and it causes compression and rarefaction cycles in air?




10. What is the power handling capacity for cone type speaker?




11. Which is the ideal medium for editing like cut, copy and paste in disk based recording?




12. What type of coding is used for weakness of human ears in audio compression?




13. In which type of applications can hard disk based drives are useful?




14. Which audio storage device is faster in retrieving audio in disk based recording?




15. What is known as each digit in binary?




16. Which information is compared with the threshold level in a binary system?




17. What is the main advantage of binary signal?




18. A combination of how many bits in a binary number is commonly called a word?




19. Which bit is used for signed numbers in binary signal?




20. What is equal to 1024 bytes?




21. In which audio systems, the sound is first converted into analog electrical signals using a microphone as a transducer?




22. What numbers is digital information made of?




23. What type of errors can be eliminated for stereo images in digital systems?




24. Which of the following restrictions apply to analog broadcasting?




25. Over how much distance can we transmit digital audio without loss of quality?




26. Which is the important part of the system which are being used to time shift broadcast programs to skip commercial breaks?




27. Which type of audio video files can be made portable by downloading?




28. Which of the following cannot be detected and therefore it is difficult to separate the original signal from distorted signal in audio signal?




29. What is the full form of PCM?




30. In which manner each sample is represented in audio signal?




31. What is expressed as the magnitude of sample represented by finite number which is proportional to some voltage in audio signal?




32. At which time step is a sample taken in ADC?




33. What is the other name for black and white TV?




34. Which generator produces sets of pulses to operate the system at appropriate timings?




35. Which carrier frequency is used in audio modulation in an FM transmitter for the purpose of audio signal transmission?




36. Which antenna is preferred for aerial TV receiver in monochrome TV receiver?




37. Which power supply is used in the monochrome TV receiver?




38. Which three colors are used in color TV transmitter?




39. What is the full form of VSB?




40. How many times more pixels do an HDTV have than the resolution of analog signal in a DTV?




41. Which digital signal processing technique takes preventive measures to protect the transport streams from errors caused by noise and interference in the transmission channel in DTV transmitter and receiver?




42. What is the other name for video monitor?




43. Which sync signals ensure that the scanning action of the electron beam down and across the screen is in synchronization in video monitors?




44. What is termed as the process of exploring a video picture image in quick succession?




45. Which signals are applied to the horizontal and vertical deflection circuits of the camera tube in scanning?




46. What is the word used by TV engineers for one complete scanning from left to right and top to bottom and then again to the top?




47. How many scanning lines per frame are there for Indian PAL system?




48. What happens to the image if the space between pictures is longer than the period of persistence of vision?




49. What is the field rate for PAL system?




50. What is the term for even and odd fields that are scanned alternately?