Cochin Shipyard Interview Questions and Answers

Tank cleaning procedure involves thorough cleaning of the tank interior to remove any residue or contaminants.

• Ensure all equipment and tools are properly cleaned and sanitized before use

• Use appropriate cleaning agents and techniques based on the type of residue or contaminants present

• Inspect the tank interior before and after cleaning to ensure all residue is removed

• Follow safety protocols and wear appropriate pro...read more

Incomplete penetration is the weld defect that occurs on the joint due to less flow rate of shielding argon gas.

• Incomplete penetration occurs when the weld metal does not penetrate through the joint completely.

• This can lead to weak and unreliable welds.

• It can be caused by insufficient shielding gas flow rate, improper welding technique, or incorrect welding parameters.

• Examples of incomplete penetration include lac...read more

TIG welding is a high-quality welding process that produces clean and precise welds.

• TIG welding uses a non-consumable tungsten electrode to create the arc and melt the metal.

• It requires a high level of skill and precision to control the heat and produce a clean weld.

• TIG welding is commonly used for welding thin materials, such as aluminum and stainless steel.

• It produces a high-quality weld with minimal spatter and...read more

Understanding angles in TIG and ARC welding is crucial for effective fusion runs in fillet welds.

• The angle of the torch should typically be between 15 to 30 degrees for optimal penetration.

• The work angle, which is the angle between the workpiece and the torch, is usually around 45 degrees for fillet welds.

• For horizontal fillet welds, a 5 to 10-degree push angle can help control the weld pool.

• In vertical welding, a...read more

Acetylene cylinders are kept in an upright position to prevent the acetone inside from leaking.

• Keeping acetylene cylinders upright prevents the acetone from coming into contact with the porous material inside the cylinder.

• Acetone is used as a solvent to stabilize acetylene gas, and it is stored in a porous material to prevent the gas from becoming unstable.

• If the cylinder is not kept upright, the acetone can leak ...read more

The blasting procedure involves using high-pressure air or water to propel abrasive materials onto a surface to remove contaminants and prepare it for painting.

• Ensure proper safety measures are in place, such as wearing protective gear and setting up blast curtains.

• Select the appropriate abrasive material based on the surface material and desired finish.

• Adjust the pressure and angle of the blasting nozzle to achie...read more