Gat Engineer Interview Questions and Answers for Freshers

Air is used in aircraft as a refrigerant due to its availability, low cost, non-toxic nature, and ability to easily dissipate heat.

• Air is readily available and can be easily compressed and expanded in aircraft systems.

• It is cost-effective compared to other refrigerants.

• Air is non-toxic and poses no harm to passengers or crew members.

• It has good heat transfer properties, allowing for efficient cooling of aircraft components.

Types of valves in process control include globe valves, gate valves, ball valves, butterfly valves, and diaphragm valves.

• Globe valves: used for regulating flow in pipelines

• Gate valves: used for on/off control in pipelines

• Ball valves: quick shut-off valves with a spherical closure

• Butterfly valves: used for throttling flow with a disc

• Diaphragm valves: control flow with a flexible diaphragm

Temperature sensors work based on the principle of detecting changes in electrical resistance, voltage, or current in response to temperature variations.

• Temperature sensors can be based on various principles such as resistance temperature detectors (RTDs), thermocouples, thermistors, and infrared sensors.

• RTDs work by measuring the change in electrical resistance of a metal wire as temperature changes.

• Thermocouples generate a voltage proportional to the temperature difference ...read more

Strength of Materials is a branch of engineering that deals with the behavior of solid objects subjected to stresses and strains.

• Strength of Materials focuses on understanding how materials deform and fail under various types of loads.

• It involves studying concepts like stress, strain, elasticity, plasticity, and fracture mechanics.

• Applications include designing structures, machines, and components to ensure they can withstand expected loads without failure.

• Examples include ca...read more

Sensors and transducers are devices used to detect and convert physical quantities into electrical signals.

• Sensors detect physical quantities such as temperature, pressure, light, etc.

• Transducers convert the detected physical quantities into electrical signals.

• Examples include thermocouples for temperature sensing and strain gauges for pressure sensing.