1. With respect to the turtle species in Indian waters, which of the following are listed as vulnerable on the IUCN Red List of Threatened Species?
- Olive Ridley
- Leatherback
- Loggerhead
- Hawksbill
- Green turtle
Select the correct answer using the codes given below:
[A] Only 1 & 3
[B] Only 1, 2 & 3
[C] Only 2, 3 & 4
[D] Only 1, 3, 4 & 5
Show Answer
Correct Answer: B [Only 1, 2 & 3]
Notes:- There are five species in Indian waters, Olive Ridley, Green turtle, Loggerhead, Hawksbill, Leatherback.
- The Olive Ridley, Leatherback and Loggerhead are listed as ‘Vulnerable’ on the IUCN Red List of Threatened Species.
- The Hawksbill turtle is listed as ‘Critically Endangered’ and Green Turtle is listed as ‘Endangereed’ on the IUCN Red List of Threatened Species.
- They are protected under Schedule I of Wildlife Protection Act, 1972.
2. Consider the following applications:
- Railway ballasting
- Road construction
- Water treatment
- Soil conditioning
Which of the applications given above can be carried out using steel slag?
[A] Only 1 & 2
[B] Only 1, 2 & 3
[C] Only 2, 3 & 4
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: D [1, 2, 3 & 4]
Notes:- Steel slag can be used as a railway ballast aggregate as it is hard, dense and resistant to both attrition and abrasion.
- Steel making slag can be used road making aggregate in SAIL.
- Crushed Steel slag can be used for soil conditioning. Tea and coffee plantations are potential customers.
- Steel slag can be used to neutralize the pH of the waste water as it contains oxide of aluminium and iron combined with a calcium base. It can be used to treat acidic water discharges from abandoned mines.
- Steel slags can be used for flooring tiles because of their good abrasive materials properties.
3. Consider the following pairs:
- Transform boundary- The San Andreas Fault in California
- Divergent boundary – Mid-Atlantic Ridge
- Oceanic-continental convergent plate boundary – the Washington-Oregon coastline of the United States
- Oceanic-oceanic convergence – Mariana Trench
How many pairs given above is/are correct?
[A] Only 1 pair
[B] Only 2 pairs
[C] Only 3 pairs
[D] Only 4 pairs
Show Answer
Correct Answer: D [Only 4 pairs]
Notes:- Transform boundary- The San Andreas Fault in California, where the Pacific Plate moves northward past the North American Plate.
- Divergent boundary – Mid-Atlantic Ridge where the American Plates are separated from the Eurasian and African Plates.
- Oceanic-continental convergent plate boundary – the Washington-Oregon coastline of the United States, here, the Juan de Fuca oceanic plate is subducted beneath the North American continental plate.
- Oceanic-oceanic convergence – Mariana Trench, Pacific plate subducts beneath the Philippine plate.
- Continental convergent plate boundary – the Himalayan Mountain Range, here, the Indian and Eurasian plates are currently in collision.
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