The process of water percolating into the ground is called Choose one: A. saturation. B. infilling. C. accumulation. D. infiltration.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges