same
higher
lower
uncomparable
turbo-jet
turbo-propeller
rocket
ram-jet ,
pulsojet requires no ambient air for propulsion
ramjet-engine has no turbine
turbine drives compressor in a burbojet
bypass turbo-jet engine increases the thrust without adversely affecting, the propulsive efficiency and fuel economy
burning fuel after gas turbine
injecting water in the compressor
injecting ammonia into the combustion chamber
all of the three above
mild steel
stainless steel
carbon steel
high nicket alloy (neimonic).