Instrumentation Engineering Interview Questions and Answers
Question - 41 : - What an instrumentation technician/mechanic do?
Answer - 41 : -
Instrumentation technologists, technicians and mechanics are trained in troubleshooting and fixing equipment and instruments. This trade is so interconnected with electricians, pipefitters, power engineers, and engineering firms that in extremely diverse working conditions you will find yourself.
Question - 42 : - What is calibration?
Answer - 42 : -
Calibration is a set of operations that documented comparison of the measurement device to be calibrated against a traceable reference standard/device.
Question - 43 : - What is calibration certificates?
Answer - 43 : -
The calibration certificate is the official document authorized for the calibration of instruments and provides traceability to the National Institute of Standards and Technology.
The calibration certificate is issued by most businesses as a historical record. However, some enter data on the certificate in a local database to track the status of their test equipment inventory.
Question - 44 : - What are the different types of calibration?
Answer - 44 : -
- Transducer calibration
- Data system calibration
- Physical end to end calibration
Question - 45 : - How frequently an instrument should be calibrated?
Answer - 45 : -
- Calibrate instruments on the basis of manufacturer recommendation.
- Before and after critical measuring project
- Monthly, quarterly, or semiannually
Answer - 46 : -
Calibration describes the precision and efficiency of the measurement obtained using a machine component. Over time, machinery begins to drift from its precision when it uses specific techniques or tests particular parameters such as heat and humidity. And:
- Calibration keeps process safe
- Machine Calibration can help to reduce costs from manufacturing errors
Question - 47 : - What is intrinsic safety system?
Answer - 47 : -
A system that involves equipment and interconnecting wiring in which any spark or thermal effect in any part of the system intended for use in hazardous areas is unable to cause ignition.
Question - 48 : - What are Intrinsic Safety Barriers?
Answer - 48 : -
The safety barriers for the zener diode are voltage regulators. There are two different types of barriers, one way and two-way barriers.
There are two types of safety barriers:
Active barriers
Passive barriers
Question - 49 : - What is the difference between IS and non IS cables?
Answer - 49 : -
Non IS cables are used in non-hazardous areas where protection needs no special consideration.
Cables that are safe in faulty situations, protected from external electrical or magnetic field damage and used in intrinsic circuits are referred to as intrinsically safe cables or IS cables.
Question - 50 : - What differs Intrinsic earthing from usual earthing?
Answer - 50 : -
The IS ground connection must be separated from plant earth and other electrical ground. When used in IS cables, the screens should only be grounded at one point, usually at the same point where the interface devices are grounded, and should be isolated from each other.