In how many categories is the supersonic wind tunnel classified into?

A)
2
B)
3
C)
4
D)
5

Correct Answer :   2


Explanation : Supersonic wind tunnel is broadly classified into two categories – Intermittent wind tunnel and continuous wind tunnel. Out of these two, the intermittent wind tunnel is more commonly used due to simpler design, faster start and more power available to start the wind tunnel.