Primary Production of Oil

Q. Which of the following is not obtained by petroleum refining?

1. Petrol
2. Lubricating oil
3. Paraffin wax
4. Coke

Q.

The approximate amount of oil left in an oil well after primary recovery process is:

1. 25%

2. 50%

3. Not fixed

4. 75%

Q.

In the primary recovery process, oil is forced out due to the natural pressure build-up on the rocks.

1. True

2. False