EMDAD LLC Mechanical Technician Interview Questions and Answers

Process piping handles fluids in manufacturing, while power piping focuses on steam and hot water in energy generation.

• Process piping is used in industries like chemical and food processing, e.g., transporting chemicals.

• Power piping is primarily found in power plants, e.g., steam lines in a thermal power station.

• Process piping systems often operate at lower pressures compared to power piping systems.

• Power piping must a...read more

Process piping is governed by codes like ASME B31.3, ensuring safety and efficiency in fluid transport systems.

• ASME B31.3: Covers process piping for chemical plants, refineries, and related facilities.

• ASME B31.1: Focuses on power piping, including steam and hot water systems.

• API 570: Addresses in-service inspection, repair, and alteration of piping systems.

• ANSI/ISA 12.27.01: Pertains to wiring and instrumentation for h...read more

Instrumentation equipment refers to devices used to measure, control, and monitor various parameters in industrial processes.

• Instruments like pressure gauges, flow meters, and temperature sensors are commonly used in instrumentation.

• Control valves and actuators are used to regulate the flow of fluids or gases.

• Programmable Logic Controllers (PLCs) are used for automation and control of processes.

• Analytical instruments l...read more

A PLC panel wiring diagram is a visual representation of the electrical connections and components in a programmable logic controller panel.

• A PLC panel wiring diagram shows the layout and connections of various components such as power supplies, input/output modules, relays, and sensors.

• It helps technicians understand how the electrical signals flow within the panel and how different devices are interconnected.

• The diag...read more

A control valve is a device used to regulate the flow of fluid or gas in a process system.

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

• They can be operated manually or automatically through an electrical or pneumatic signal.

• Control valves consist of a valve body, actuator, and positioner.

• They can control variables such as flow rate, pressure, temperature, and level.

• Exam...read more

A transmitter is a device used in instrumentation to convert a physical measurement into an electrical signal.

• Transmitters are commonly used in industries such as oil and gas, chemical, and power plants.

• They are used to measure variables such as pressure, temperature, flow rate, level, and pH.

• Transmitters typically consist of a sensing element, signal conditioning circuitry, and an output signal.

• The sensing element det...read more

Flow meters are devices used to measure the flow rate of a fluid or gas.

• Flow meters are commonly used in industries such as oil and gas, water treatment, and manufacturing.

• They can measure flow rates in various units such as liters per minute, cubic meters per hour, or gallons per minute.

• Different types of flow meters include electromagnetic, ultrasonic, turbine, and differential pressure flow meters.

• Flow meters can be...read more

Yield strength is the stress at which a material begins to deform plastically, while ultimate strength is the maximum stress a material can withstand before breaking.

• Yield strength is the point where a material starts to deform plastically, meaning it will not return to its original shape once the stress is removed.

• Ultimate strength is the maximum stress a material can withstand before it breaks or fractures.

• Yield stre...read more

Transmitter, RTD, thermocouple, control valve, and actuators are all important components in instrumentation technology.

• Transmitter is a device that converts a physical parameter into an electrical signal.

• RTD (Resistance Temperature Detector) is a type of temperature sensor that measures temperature by detecting changes in electrical resistance.

• Thermocouple is another type of temperature sensor that measures temperatur...read more

I would assess the impact of the out-of-tolerance part and determine if it can still function within acceptable limits or if it needs to be reworked or replaced.

• Assess the functionality of the part with the out-of-tolerance dimensions

• Determine if the part can still meet the overall design requirements despite being out of tolerance

• Consider the potential impact on the performance and safety of the final product

• Consult w...read more

The drawing appears to be a mechanical component with multiple parts and dimensions.

• The drawing includes various geometric shapes such as circles, rectangles, and lines.

• There are labels indicating dimensions and measurements for each part.

• The drawing may also include annotations or symbols representing different materials or processes.

• It seems to be a detailed technical drawing for manufacturing or assembly purposes.