Share Facebook Email Telegram WhatsApp Results #1. As per the WHO, the safe noise level for a city is _____. 45 dB 45 dB 50 dB 50 dB 55 dB 55 dB 60 dB 60 dB #2. The tolerable limit of noise for human being is around ___. 25 decibel 25 decibel 80 decibel 80 decibel 125 decibel 125 decibel 155 decibel 155 decibel #3. Sound above what level is considered hazardous noise pollutions? 30 dB 30 dB 100 dB 100 dB 80 dB 80 dB 120 dB 120 dB #4. The optimum sound level for human beings is ___. 90 dB 90 dB 60 dB 60 dB 120 dB 120 dB 100 dB 100 dB #5. Which of the following has the longest wavelength? Infrared Infrared X-rays X-rays Visible light Visible light Radio waves Radio waves #6. Which one of the following does a TV remote control unit use to operate a TV set? Light waves Light waves Sound waves Sound waves Micro waves Micro waves Radio waves Radio waves #7. Which type of electromagnetic radiation is used in the remote control of a television? Infrared Infrared Ultraviolet Ultraviolet Visible Visible None of these None of these #8. The Doppler’s effect is applicable for ____. Light waves Light waves Sound waves Sound waves Space waves Space waves Both a and B Both a and B #9. In television broadcast, the picture signals are transmitted by _____. Amplitude modulation Amplitude modulation Frequency modulation Frequency modulation Phase modulation Phase modulation Angle modulation Angle modulation #10. The technique used to transmit audio signals in television broadcast is _____. Amplitude modulation Amplitude modulation Pulse code modulation Pulse code modulation Frequency modulation Frequency modulation Time dimension multiplication Time dimension multiplication Finish
