While discussing construction vehicles, Technician A says their operation is primarily movement of material to and from a job site. Technician B says operating conditions are 90% of loaded operation on road surfaces made of concrete, asphalt, gravel, crushed rock, or hard-packed dirt. Who is correct?

Acompressor compresses a gas, a pump compresses a liquid. for a given pressure ratio, why does it take more work to compress a gas in a compressor than a liquid in a pump? a)- for a given pressure ratio the average specific volume for a gas is much higher than the average specific volume for a liquid. b)- there is no difference. the only difference is the amount of heat generated (not work) c)- for a given pressure ratio the average volurge for a gas is much higher than the average volume for a liquid. d)-there is no difference