10+ Prabha Automotive Engineers Interview Questions and Answers

ASME B31.3 is the code used for transportation of Hydrocarbon Fluids as per ASME Sec VIII Div.1.

• ASME B31.3 code is used for transportation of Hydrocarbon Fluids

• ASME Sec VIII Div.1 is for pressure vessels, not transportation

• Examples: ASME B31.3 code is used for pipelines carrying hydrocarbon fluids

Ultrasonic Testing (UT) is used to measure sub surface defects below 12mm.

• Ultrasonic Testing (UT) is a non-destructive testing method that uses high frequency sound waves to detect internal flaws in materials.

• UT is commonly used in industries such as aerospace, automotive, and manufacturing to inspect for defects like cracks, voids, and inclusions.

• The technique is effective for detecting sub surface defects as it can penetrate materials and provide detailed information about ...read more

The hydrotest pressure of a vessel with MAWP=1MPa is typically 1.5 times the MAWP.

• Hydrotest pressure is usually 1.5 times the MAWP (Maximum Allowable Working Pressure)

• For MAWP=1MPa, the hydrotest pressure would be 1.5 MPa

• Hydrotest pressure ensures the vessel's structural integrity under pressure

The gap required in fit-up of pipes depends on the welding process and material being used.

• The gap for TIG welding is typically 1/16 to 1/8 inch.

• For MIG welding, the gap can be slightly larger, around 3/32 to 1/8 inch.

• The gap should be uniform along the entire length of the joint for proper welding.

• The material being welded also influences the gap size, with thicker materials requiring larger gaps.

The instrument used for surface preparation is a sandblaster.

• Sandblaster is commonly used for surface preparation in industries like construction, automotive, and shipbuilding.

• It uses compressed air to propel abrasive material at high velocity to smooth out rough surfaces or remove contaminants.

• Examples of abrasive materials used in sandblasters include sand, garnet, and glass beads.

X-ray film is commonly used for radiography testing.

• X-ray film is sensitive to X-ray radiation and produces an image when exposed.

• The film is placed behind the object being tested and exposed to X-rays.

• After exposure, the film is developed to reveal any defects or abnormalities.

• Common types of X-ray film include industrial radiographic film and medical radiographic film.

Pipe is measured by its inner diameter, while tube is measured by its outer diameter.

• Pipe is used to transport fluids or gases, while tube is often used for structural applications.

• Pipe is typically manufactured to specific industry standards, while tube may have more varied dimensions and tolerances.

• Examples: PVC pipe for plumbing, steel tube for construction.

IQI stands for Image Quality Indicator, used in radiography testing to ensure the quality of the radiographic image.

• IQI is a tool used to determine the quality of radiographic images by measuring the image quality parameters such as contrast, resolution, and sensitivity.

• It consists of a series of patterns or objects with specific details that are placed on the radiographic film along with the test object.

• The IQI is then exposed to the same conditions as the test object to eva...read more

Types of welding include arc welding, gas welding, resistance welding, and laser welding.

• Arc welding: uses an electric arc to melt and join metals, such as MIG welding and TIG welding

• Gas welding: uses a gas flame to melt and join metals, such as oxyacetylene welding

• Resistance welding: uses electric resistance to generate heat and join metals, such as spot welding

• Laser welding: uses a high-powered laser beam to melt and join metals