the efficient steam jacketing of the cylinder walls
superheating the steam supplied to the engine cylinder
keeping the expansion ratio small in each cylinder
all of the above
barometric pressure + actual pressure
barometric pressure - actual pressure
gauge pressure + atmospheric pressure
gauge pressure - atmospheric pressure
Yes
No
Unknown
None
I.P. = a x m + b
m = a + b x I.P.
I.P. = b x m + a
m = b/I.P. - a
the power required and working pressure
the fuel and water available