Utility Maintenance Technician Interview Questions and Answers

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

• Transistors are fundamental building blocks of modern electronic devices.

• They can be used as amplifiers, switches, or signal modulators.

• Transistors have three terminals: emitter, base, and collector.

• Common types of transistors include bipolar junction transistors (BJTs) and field-effect transistors (FETs).

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.

• Ohm's law is expressed as V = I * R, where V is voltage, I is current, and R is resistance.

• It helps in calculating the relationship between voltage, current, and resistance in an electrical circuit.

• For example, if a circuit has a voltage of 12 volts and a resistance of 4 ohms, the current flowing through...read more

Cooling tower chemicals are used to prevent scale, corrosion, and biological growth in the system.

• Cooling tower chemicals include biocides, corrosion inhibitors, and scale inhibitors.

• Biocides are used to control biological growth such as algae and bacteria.

• Corrosion inhibitors protect metal surfaces from corrosion.

• Scale inhibitors prevent mineral deposits from forming on heat exchange surfaces.

• Chemical treatment is essential for maintaining the efficiency and longevity of coo...read more