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| Q. |
Which of the following is known as Re- entrant mouthpiece? |
| A. | external mouthpiece |
| B. | convergent mouthpiece |
| C. | internal mouthpiece |
| D. | cylindrical mouthpiece |
| Answer» C. internal mouthpiece | |
| Explanation: according to the position, mouthpieces are classified as an external mouthpiece and internal mouthpiece. if the tube projects inside the tank, it is called an internal mouthpiece or re-entrant or borda’s | |
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