What is the most significand advantage of expendable pattern casting process over conventional sand mold casting? what is the most significant disadvantage?

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false