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Dimensional Analysis - Quiz Starter Quiz

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Question 1Multiple Correct Options

Which of the following are dimensionless quantities?

Question 2

On the apron of spillway model built to a scale of 1:30, time required to open the spillway gate is 100 seconds. Calculate the time in second required by the prototype to produce the same surge effect in model.

Question 3

It is required to carry out model studies on a boat travelling at a speed of 3m/s. Assume the acceleration due to gravity as 10m/s2 and neglect the effects due to viscous & surface tension forces. The depth of water can be assumed as 3.6m. The value of appropriate non-dimensional no. is_____

Question 4Multiple Correct Options

Which of the following options are true?

Question 5Multiple Correct Options

Which of the following are the methods of dimensional analysis?

Question 6

There is a 1: 30 scale model of a submarine which has to undergo a drag test in a wind tunnel when it is operating in ocean at 15 km/hr. The kinematic viscosity of air is 1 .51 × 10–5 m2/s and for water 1.02 × 10–6 m2/sec. What is the velocity of air (in m/s) in wind tunnel that should be maintained for kinematic similarity?

Question 7

The Reynold’s number for a fluid in a pipe of 25 cm diameter is 2000. Then the Reynold’s number in a 15 cm diameter pipe forming an extension of the 25 cm flow pipe will be ……… (round of to 2 decimal places) Take the flow as incompressible.
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May 16ESE & GATE CE