isothermal

adiabatic

polytropic

any one of the above

atmospheric

slightly more than atmospheric

pressure sightly less than atmospheric and temperature slightly more than atmospheric.

pressure slightly more than atmospheric and temperature slightly less than atmospheric

at very high speed

at very slow speed

at average speed

at zero speed

increases

decreases

remains unaffected

may increase or decrease depending on compressor capacity

(a) multi-stage compression

(b) cold water spray

(c) fully insulating the cylinder

both (a) and (b) above