Environmental Studies Pollutants TS TET MCQ
29 The time taken for changing one longitude to another
1. 1 minute
2. 2 minutes
3. 4 minutes
4. none
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28 Latitude of tropic cancer is .....
1. 23 1/2 north latitude
2. 23 1/2 south latitude
3. 0 middle latitude
4. none
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27 Total number of longitudes on the earth .......
1. 180
2. 90
3. 360
4. none
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26 Number of latitudes on each hemisphere is ......
1. 180
2. 90
3. 270
4. none
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25 0 latitudes is called as ......
1. middle latitude
2. half latitude
3. equator
4. none
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24 Phases of the moon take place in ....... days
1. every 20
2. every 16
3. every 15
4. none
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23 The serial number of our earth among planets around the sun is .......
1. 5
2. 4
3. 3
4. none
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22 The shape of earth is ......
1. round
2. spherical
3. rectangle
4. none
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21 Sea water is purified .......
1. by boiling
2. by cooling
3. by filtration
4. none
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20 Decantation takes place in .......
1. filtration tank
2. chlorination tank
3. sedimentation tank
4. none
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