Sunday, September 10, 2017

TRB Mechanical Solved Question on Laminar Flow Maximum Velocity

Going to write the TRB Polytechnic Lecturer Exam 2017 ? Want some solved questions for Mechanical Engineering? Here is a question which was asked in the previous year exam (Engineering College Exam) held in 2016. This question comes under the Syllabus of Fluid Mechanics and Machinery (Laminar Flow). The question is not widely available in the internet. No answer can be found in the internet for the following question and thus we have come here with a solution which will give an idea for those who are preparing the TRB exam very seriously. Here is the question and its solution.

Question: Laminar Developed flow at an average velocity of 5 m/sec occurs in a pipe of 10 cm radius. The velocity at 5 cm radius is, 
A) 7.5 m/sec B) 5 m/sec C) 2.5 m/sec  D) 10 m/sec

The Solution in detail:
You will find the explanation for the answer below. As the maximum velocity occurs at the centre for laminar flow, the calculation is made accordingly. See the attachment for solution.

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