Pentomino Challenge

These are pentominoes, with their letter codes:

F:
pentomino f
I:
pentomino i
L:
pentomino l
M:
pentomino m
N:
pentomino n
P:
pentomino p
T:
pentomino t
U:
pentomino u
V:
pentomino v
X:
pentomino x
Y:
pentomino y
Z:
pentomino z

This challenge is more difficult than it looks.

Create four yes/no questions which uniquely classify each pentomino.

Examples of such questions are: 

The idea is to create a set of questions where no pentomino has the same answers as another.

Example

 Rotational
Symmetry
Reflection
Symmetry
Open Box Point
Symmetry
Fnonoyesno
Iyesyesnoyes
Lnononono
Mnoyesyesno
Nyesnoyesyes
Pnononono
Tnoyesyesno
U    
V    
X    
Y    
Z    

... so these four questions do not work ... the answers for T are the same as for M ... !


Can YOU think of four questions which will work?

(You can discuss this at the forum.)

This is based upon an investigation by L Mottershead. Sources of Mathematical Discovery