Examination Model! Do they exist?

That’s an interesting expression “Exam Model”. I suppose this “Exam Model” is built differently from the other type of vertical pianos. Asked your piano dealer / technician to explain and show you the different between “A Good Piano” and an “Exam Model”?
A good musical standard is a piano that is in tune and well regulated for tone and touch, respectively. A piano which does not perform to good musical standards is essentially a recreation object.

Vertical pianos come in various sizes:-

A) The shortest is the “Spinet Model”, about 35" to 39" tall. Because the action (the mechanism that transmits your keystroke to the hammer) is of a different design, a spinet will usually have a lighter and less responsive touch than a larger piano. And the spinet's smaller soundboard and shorter strings produce a thinner tone.

B) “Console Model”, 40" to 44", has a “Compressed Action” This means that the action parts including the hammer length are smaller than on other pianos. This design improves the tone over the “Spinet Model” but less responsive touch due to the smaller parts.

C) Pianos that are 45" to 48" are called “Studio Model” and those 49" and above are called “Upright Model”. These larger pianos have the advantages of full-sized actions, so their touch is the most responsive of all vertical designs. With their larger soundboard and longer strings, they are capable of a richer and fuller tone. The Studio Model and Upright Model are both the choice of musician as explain above.