Alpla Technician 1 Interview Questions and Answers

A thermocouple is a temperature sensor made of two different metals that produce a voltage proportional to the temperature difference.

• Consists of two dissimilar metal wires joined at one end

• Produces a voltage when exposed to a temperature gradient

• Used to measure temperature in various industries such as HVAC, automotive, and manufacturing

• Common types include J, K, and T thermocouples

• Requires a reference junction to acc

Proximity refers to the closeness or nearness of an object to another object or a sensor.

• Proximity is often measured using sensors such as infrared, ultrasonic, or capacitive sensors.

• Proximity sensors are commonly used in industrial automation, robotics, and automotive applications.

• Examples of proximity sensors include photoelectric sensors, inductive sensors, and magnetic sensors.

• Proximity sensors can detect the prese...read more

A control valve is a device used to regulate the flow of fluid or gas in a system. There are several types of control valves.

• Control valves are used in various industries such as oil and gas, chemical, and power generation.

• The most common types of control valves are globe valves, ball valves, butterfly valves, and diaphragm valves.

• Control valves can be operated manually or automatically through an actuator.

• They can con...read more

Input devices of PLC are sensors, switches, and meters. Output devices are actuators, relays, and valves.

• Input devices are used to collect data from the environment and send it to the PLC for processing.

• Output devices are used to control the environment based on the processed data from the PLC.

• Examples of input devices include temperature sensors, pressure switches, and flow meters.

• Examples of output devices include mo