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| 46)The thickness of the troposphere increases in | |||
| summer | winter | ||
| spring | never changes | ||
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| 47)The gas in the atmosphere that absorbs ultraviolet rays is | |||
| methane | nitrogen | ||
| ozone | helium | ||
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| 48)The fall in temperature with increasing elevation is called | |||
| thermal anomaly | thermal reduction | ||
| thermal fall | lapse rate | ||
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| 49)Where is doldrums belt located? | |||
| near the equator | near the polar areas | ||
| on the tropic of cancer | on the tropic of capricon | ||
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| 50)What is the name given to the wind blowing from sub tropical high pressure region to the equator? | |||
| westerlies | trades | ||
| northerlies | doldrums | ||
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| 51)\'Horse latitudes\' is the name of the | |||
| 0 degree - 5 degree north and south latitudes | polar circles | ||
| 30 degree - 40 degree north and south latitudes | 40 degree - 60 degree north and south latitudes | ||
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| 52)The reason for the fact that stratosphere is ideal for flying jet air craft is | |||
| that this layer is rich in ozone which reduces fuel consumption | that the temperature is constant and ideal for aircraft engine efficiency | ||
| that this layer is out of the firing range of anti aircraft guns | that the absence of clouds and other weather phenonema | ||
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| 53)Incoming solar radiation is known as | |||
| radiation | refraction | ||
| insolation | reflection | ||
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| 54)The velocity of wind is governed by | |||
| Farrel\'s law | pressure gradient | ||
| rotation of the earth | temperature | ||
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| 55)Why does the sky look blue | |||
| because the blue light is scattered by dust particle | because blue is the natural colour of the sky | ||
| because of the presence of water vapour in the sky | because blue colour has longest wave length | ||
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| 56)The cause of change of seasons on the earth is | |||
| rotation of the earth | revolution and inclination of the earth | ||
| rotation of the sun | rotation of the moon | ||
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| 57)Arrange the planets correctly in descending order in terms of number of their satellites (1) Uranus (2) Jupiter (3) Saturn (4) Mars | |||
| 2, 3, 1, 4 | 4, 2, 3, 1 | ||
| 2, 3, 4, 1 | 3, 2, 1, 4 | ||
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| 58)Identify the sedimentary rocks (1) Basalt (2) Limestone (3) Shale (4) Granite (5) Quartzite | |||
| 1 and 2 | 2 and 3 | ||
| 2 and 5 | 3 and 4 | ||
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| 59)The instrument used for measuring humidity | |||
| barometer | thermometer | ||
| hygrometer | hydrometer | ||
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| 60)How much pressure exerted by the atmosphere at the sea level? | |||
| one kg per square cm | one pound per square cm | ||
| five kg per square cm | two kg per square cm | ||
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