# Mechanical Engineering - Hydraulics and Fluid Mechanics - Discussion

2.

An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.

 [A]. less than twice [B]. more than twice [C]. less than three times [D]. more than three times

Explanation:

No answer description available for this question.

 Ganesh said: (Aug 26, 2015) How it says?

 Ajeet Tripathi said: (Aug 31, 2015) What is mouth piece meaning in this question?

 Vasukeee said: (Oct 22, 2016) I think the answer is equal diameter of the orifice. Am I right?

 Ajay Gupta said: (Nov 30, 2016) Yes, you are right @Vasukeee.

 Muhammad Waqas said: (Feb 25, 2017) If the jet, after contraction, does not touch the sides of the mouthpiece, it is said to be running free. It has been experimentally found that if the length of the mouthpiece extending into the fluid is less than 3 times the diameter of the orifice, it will run free. If the jet, after contraction, expands and fills up the whole mouthpiece, it is said to be running full. If the length of the mouthpiece is more than 3 times the diameter of the orifice, it will run full.

 Deepak Rathva said: (Jun 6, 2018) Answer should be equal to Option A is the nearest to Diameter D. So, I prefer A.

 Pallab Dey said: (Sep 5, 2020) The length of the mouthpiece is equal to the diameter, if it is running free.

 Abhishek Verma said: (Sep 26, 2020) If the length of the mouthpiece extending into the fluid is less than 3 times the diameter of the orifice, it will run free.

 Abhishek said: (Sep 26, 2020) Please explain this.

 Sourav said: (Feb 18, 2021) It should be equal to.

 Rajkotha said: (May 15, 2021) Free = equal to the diameter or less than three times. Full = equal to three times or more than three times. (RS Khurmi).