10+ C R Narayana Rao Architects Interview Questions and Answers

Increasing the tool diameter and decreasing the tool diameter will not reduce the load on the spindle.

• Increasing the tool diameter will increase the load on the spindle as more material needs to be removed.

• Decreasing the tool diameter will also increase the load on the spindle as the tool needs to work harder to remove the same amount of material.

• To reduce the load on the spindle, other strategies such as reducing the cutting speed or feed rate can be considered.

MQL stands for Minimum Quantity Lubricants.

• MQL refers to a lubrication technique that uses a minimal amount of lubricant.

• It is commonly used in machining processes to reduce costs and environmental impact.

• MQL systems deliver a precise amount of lubricant directly to the cutting zone.

• The lubricant is atomized into fine droplets, ensuring efficient lubrication.

• Examples of MQL applications include drilling, milling, and turning operations.

Al2O3 is aluminum oxide abrasive while silica abrasive is made from silicon dioxide.

• Al2O3 is harder than silica abrasive

• Al2O3 is more commonly used for grinding metals while silica abrasive is used for softer materials like wood or plastic

• Silica abrasive is more heat resistant compared to Al2O3

I would use a 125mm diameter cutter on a 125 length cube.

• Select a cutter with a diameter of 125mm to match the length of the cube

• Ensure the cutter is suitable for cutting through the material of the cube

• Consider the depth of cut required for the cube

Upmilling and down milling are two different types of milling processes used in machining.

• Upmilling, also known as conventional milling, involves feeding the workpiece against the rotation of the milling cutter.

• Down milling, also known as climb milling, involves feeding the workpiece in the same direction as the rotation of the milling cutter.

• In upmilling, the cutting forces tend to lift the workpiece, resulting in a less stable cutting process.

• In down milling, the cutting fo...read more

Titanium is lighter, stronger, more corrosion resistant, and biocompatible compared to steel.

• Titanium is lighter in weight than steel, making it ideal for applications where weight is a concern.

• Titanium is stronger than steel, with a higher strength-to-weight ratio.

• Titanium is more corrosion resistant than steel, especially in harsh environments.

• Titanium is biocompatible, making it suitable for medical implants and surgical instruments.

Abrasives are materials used for grinding, polishing, or cleaning surfaces by wearing away material through friction.

• Abrasives are commonly used in industrial applications for grinding, cutting, polishing, and sanding

• Examples of abrasives include sandpaper, grinding wheels, and polishing compounds

• Different abrasives have varying levels of hardness and are used for different applications

Work holding in VMC refers to the methods used to secure the workpiece during machining.

• Clamps: Commonly used to hold the workpiece in place.

• Vises: Used for holding workpieces that have flat surfaces.

• Fixtures: Customized devices designed to hold specific workpieces.

• Collets: Used for holding cylindrical workpieces.

• Magnetic chucks: Utilized for holding ferromagnetic workpieces.

• Vacuum chucks: Used for holding thin or delicate workpieces.

• Tombstones: Multi-sided fixtures that allo...read more

SS316 is a type of stainless steel known for its corrosion resistance and high temperature strength.

• Contains 16-18% chromium

• Contains 10-14% nickel

• Contains 2-3% molybdenum

• Also contains small amounts of carbon, manganese, silicon, phosphorus, sulfur, and nitrogen