General Knowledge Key's video: 45 Science GK Questions and Answer in English Science Trivia Questions and Answers Science Quiz

45 Most Important Science GK Questions and Answer in English | Science Trivia Questions and Answers | Science Quiz Questions Answers 1. Wave Motion Science GK Questions and Answer in English 2. Thermodynamics Science GK Questions and Answer in English 3. Sound Science GK Questions and Answer in English 1. Which of the following atmospheric layers is responsible for the deflection of radio waves? 2. Which waves cannot be transmitted through vacuum? 3. Long radio waves are reflected by which of the following layer of Earth’s surface? 4. Wireless communication is reflected back to the Earth’s surface by the 5. Cosmic rays- 6. Which one of the following statements is not true about cosmic rays? 7. Which one of the following is used for determining the structure of crystal? 8. Which of the following is a mechanical wave? 9. A radar which detects the presence of an enemy aircraft uses 10. Which one of the following types of waves are used in a Night Vision apparatus? 11. Waves used for telecommunication are- 12. FM broadcasting service uses the range of frequency bands between 13. Following rays are used in the diagnosis of intestinal diseases 14. CT scan is done by using 15. The normal temperature of human body on the Kelvin scale is 16. What is the use of thermostat? 17. The safest temperature for keeping food fresh in a refrigerator is 18. When a glass rod is placed in steam, its length increases but its width 19. In the night wind blows fast, dew is not formed because 20. What does an air conditioner installed in a room control? 21. The cooling by a desert cooler is based on [RAS/RTS (Pre) 2012] 22. It is more comfortable to wear white cloth in summer because 23. The most important function of perspiration is to 24. Lightning can even burn a tree because it contains tremendous amount of 25. A fan produces feeling of comfort during hot weather, because 26. When water is heated from 0ºC to 10ºC. It’s volume [IAS (Pre) 2001] 27. Opening the door of refrigerator kept in the room 28. In which medium the speed of sound is maximum at a temperature of around 20ºC? 29. Sound waves- [UPPCS (Pre) 2002] 30. The velocity of sound is maximum in- [UP Lower (Spl)(Pre) 2008 31. In which of the following option sound may not be across travel? 32. The velocity of sound in air is approximately 33. Two astronauts cannot hear each other on the Moon’s surface, because- 34. Ultrasonics are sound waves of frequency - [UPPCS (Pre) 2012] 35. A biotechnique in which ultrasonic sound is used - 36. Decibel is used to measure 37. Decibel unit is used to measure 38. As per the WHO, the safe noise level for a city is 39. The tolerable limit of noise for human being is around 40. The optimum sound level for human beings is [RAS/RTS (Pre) 2012] Click below link to SUBSCRIBE to Helpful General Knowledge Channel for more update videos ... http://bit.ly/2k2dnju My Other General Knowledge Channel Visit & Subscribe :- ----------------------------------------------------------------------------------------------------- Helpful G.Knowledge - (Hindi & English) : http://bit.ly/2vwemzc General Knowledge GK Q&A -(Hindi only) : http://bit.ly/2wrZqn4 ------------------------------------------------------------------------------------------------------ Follow this link to join my WhatsApp group: https://chat.whatsapp.com/H4koqIc4D02L91eHjUXj9z