Q. Consider the following statements about surface mining:

1. Surface mining is also known as open-cast mining.
2. The output is very low but rapid.
3. Overhead costs such as safety precautions and equipment are relatively low.

Which of the above is / are correct?
Answer: Only 1 and 3
Notes: The surface mining also known as open-cast mining is the easiest and the cheapest way of mining minerals that occur close to the surface. Overhead costs such as safety precautions and equipment are relatively low in this method. The output is both large and rapid.