Usually, there is one queen in a bee colony.

She is the only fertile female in the colony and is responsible for laying eggs to produce new worker bees and drones. The queen bee is larger than the other bees in the colony and has a distinctive long abdomen. She is fed royal jelly as a larva, which helps her develop into a fully mature queen bee. The queen bee also emits pheromones that help regulate the behavior and development of the other bees in the colony. If the queen bee dies or becomes unable to perform her duties, the worker bees will select a new queen by feeding royal jelly to a larva and raising her to become the new queen.

True

which one is the possible fault source of sensor?

The leakage fault on a valve can be

The following are process variable, except

A device that translates a mechanical signal to electeical signal