Instrument Inspector Interview Questions and Answers

The standard height of instrument installation varies depending on the type of instrument and its application.

• The height should be such that the instrument is easily accessible for operation and maintenance.

• For example, the height of a pressure gauge in a pipeline should be at eye level for easy reading.

• Instruments installed in hazardous areas should be placed at a safe distance from potential sources of ignition.

• The height of instruments in control rooms should be such that ...read more

The gap between electrical tray and instrument tray depends on various factors such as safety regulations, equipment requirements, and installation specifications.

• The gap between electrical tray and instrument tray is typically determined by safety regulations and codes.

• It is important to maintain a sufficient gap to prevent any electrical interference or damage to the instruments.

• The specific gap requirement may vary depending on the type of instruments and electrical equipm...read more

Cable testing involves checking the integrity and functionality of cables used in electrical systems.

• Inspect the cable for any physical damage or wear and tear

• Check the continuity of the cable using a multimeter

• Perform insulation resistance testing to ensure the cable is not short-circuited

• Use a cable fault locator to identify any faults or breaks in the cable

• Perform a high voltage test to ensure the cable can withstand the required voltage

• Document the results of the testing ...read more

A vortex flow meter works by measuring the frequency of vortices shed by a bluff body in the flow stream.

• Vortex flow meters use a bluff body to create vortices in the flow stream.

• The frequency of vortices shed is directly proportional to the flow rate.

• The meter measures the frequency of vortices to determine the flow rate.

• Vortex flow meters are commonly used in applications where high accuracy is required, such as in the oil and gas industry.

RTD stands for Resistance Temperature Detector, which measures temperature by changes in electrical resistance.

• RTD works on the principle that the electrical resistance of a metal increases with temperature.

• The RTD sensor is made of a pure metal, such as platinum, nickel, or copper.

• The resistance change is measured using a Wheatstone bridge circuit.

• RTDs are commonly used in industrial applications for accurate temperature measurement.

• Example: A platinum RTD sensor has a resis...read more