Which type of fire extinguisher is used for petroleum fire ?
1). Foam type
2). Soda acid type
3). Powder type
4). None of these
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1. Denatured spirit is ethanol mixed with
2. The percentage of carbon in cast iron is :
4. Which one of the following is extensively used for sterilizing water ?
6. What is the most commonly used substance in fluorescent tubes?
7. Which of the following is colourless?
8. Which one is an example of Miscelles System here-
10. Which among the following elements is a liquid at room temperature?