Four, although this may vary according to the weight of the load, weight rating of the straps being used, and the nature of the load. If in doubt about the securement of your load, it is always wise to err on the side of caution and use additional tie downs.
2
A dump truck load of 7.5 yards
2
Two
Two
Two
5
2
A transformer requires a 75-kVA minimum load in order to be set.
There is no minimum
A big one.
Long enough so the load can't contact the aircraft.