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UPSC Civil Service Exam Questions

Q1:

Which one of the following statements is not correct ?

A Models are always smaller than the prototypes.

B Dynamic similarity between a model and a prototype can be verified by equating Reynold's number in a viscous flow.

C Mach number achieves significance when the velocity of fluid approaches or exceeds the sonic velocity.

D Distorted models are always exaggerated on a vertical scale.

ANS:A - Models are always smaller than the prototypes.

Models are a replica of the actual structure but it is not necesaary that model is always smaller than prototype. It may be or may not be smaller than prototype.



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