Basic Science Questions and Answers updated daily – General Knowledge
Basic Science Questions: Solved 329 Basic Science Questions and answers section with explanation for various online exam preparation, various interviews, General Knowledge Category online test. Category Questions section with detailed description, explanation will help you to master the topic.
Basic Science Questions
21. A Refrigerator works on which of the following principles?
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Correct Ans:Evaporation
Explanation:
Refrigerators and air conditioners both work on the principle of cooling through evaporation.
The vapour compression refrigeration system (VCRS) is most commonly used in refrigeration. In a vapour compression refrigeration system, refrigeration is obtained as the refrigerant evaporates by absorbing latent heat of vaporization form evaporator (storage space) and liquid refrigerant converts into vapour.
The vapour compression refrigeration system (VCRS) is most commonly used in refrigeration. In a vapour compression refrigeration system, refrigeration is obtained as the refrigerant evaporates by absorbing latent heat of vaporization form evaporator (storage space) and liquid refrigerant converts into vapour.
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22. Device which uses sound waves for detection and ranging is called _____.
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Correct Ans:Sonar
Explanation:
Sonar (originally an acronym for Sound Navigation Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.
Radar uses radio waves, which are a type of electromagnetic energy. Sonar uses the echo principle by sending out sound waves underwater or through the human body to locate objects.
Radar uses radio waves, which are a type of electromagnetic energy. Sonar uses the echo principle by sending out sound waves underwater or through the human body to locate objects.
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23. Histology is the study of:
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Correct Ans:Tissues
Explanation:
The study of human and animal tissues is known as histology.
Study of cell is called Cytology.
Hence, option C is correct.
Study of cell is called Cytology.
Hence, option C is correct.
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24. The study of universe is known as _______.
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Correct Ans:Cosmology
Explanation:
Cosmology is the study of the origin, evolution, and eventual fate of the universe. According to NASA, the definition of cosmology is 'the scientific study of the large scale properties of the universe as a whole.' Cosmologists puzzle over exotic concepts like string theory, dark matter and dark energy and whether there is one universe or many.
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25. Which of the following is not a natural fibre
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Correct Ans:Rayon
Explanation:
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26. Which of the following order is given to the planets of solar system on the basis of their sizes?
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Correct Ans:Earth, Mercury, Saturn, Jupiter
Explanation:
Earth, Mercury, Saturn, Jupiter is the order given to the planets of solar system on the basis of their sizes.
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27. Which of these is not a mosquito borne disease?
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Correct Ans:Goitre
Explanation:
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28. Which one of the following glands produces the Growth Hormone (Somatotropin)?
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Correct Ans:Adrenal
Explanation:
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29. Which one of the following is considered as the easily digestible source of protein?
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Correct Ans:Soybean
Explanation:
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30. Which one of the following is correct for a metal?
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Correct Ans:absorbs and transmits sound
Explanation:
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31. Which one of the following is not a radioactive element?
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Correct Ans:Cadmium
Explanation:
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32. Which one of the following is used as an explosive?
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Correct Ans:Nitroglycerine
Explanation:
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33. Which one of the following planets has largest number of natural satellites or moons?
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Correct Ans:Jupiter
Explanation:
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34. Which one of the following statement is NOT correct?
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Correct Ans:Milk contains none of the B-vitamins
Explanation:
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35. Which one of the following types of waves are used in a night vision apparatus?
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Correct Ans:Infra-red waves
Explanation:
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36. Which one of the following is the most effective carrier for communications?
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Correct Ans:Microwaves
Explanation:
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37. Why is it difficult to see through fog?
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Correct Ans:Rays of light are scattered by the fog droplets
Explanation:
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38. Who gave the first evidence of the Big- Bang theory?
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Correct Ans:Edwin Hubble
Explanation:
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39. WiMAX is related to which one of the following?
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Correct Ans:Communication technology
Explanation:
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40. With reference to normal human beings consider the following statements:
1. In response to the presence of HCL, secretin is produced from the duodenum.
2. Enterogastrone is produced in the small intestine in response to the presence of fatty acids.
Which of the statements is/are correct?
1. In response to the presence of HCL, secretin is produced from the duodenum.
2. Enterogastrone is produced in the small intestine in response to the presence of fatty acids.
Which of the statements is/are correct?
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Correct Ans:Both 1 & 2
Explanation:
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