Question

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 Reynolds number in a viscous flow.
• C. Match number achieves significance when the velocity of fluid approaches or exceeds the sonic velocity.
• D. Distorted models are always exaggerated on a vertical scale.

Answer 1

The correct option is A Models are always smaller than the prototypes.

Models may be larger than prototypes also. e.g., model of carburettor. However in general models are smaller than the prototypes.