SKH Metals Junior Mechanical Engineer Interview Questions and Answers

Tolerance refers to the acceptable range of variation in a physical dimension or property of a material or product.

• Tolerance is the difference between the maximum and minimum limits of a dimension or property.

• It ensures that parts fit together properly and function as intended.

• Tolerance can be specified as a numerical value or a range, such as +/- 0.1mm.

• Examples include the tolerance for the diameter of a shaft or the

The least count of a micrometer is the smallest measurement that can be read on the scale.

• The least count of a micrometer is typically 0.01mm or 0.001mm depending on the type of micrometer.

• It is determined by the number of divisions on the thimble and the main scale.

• For example, a micrometer with 50 divisions on the thimble and a main scale reading in mm will have a least count of 0.01mm.

A jig is a type of tool used to control the location and/or motion of another tool. A fixture is a work-holding or support device used in the manufacturing industry.

• Jigs are used to guide cutting tools, while fixtures are used to hold workpieces in place during machining operations.

• Jigs and fixtures are commonly used in manufacturing processes such as welding, drilling, and milling.

• Examples of jigs include drill jigs, ...read more

TIG welding uses a tungsten electrode to create a precise and clean weld, while MIG welding uses a consumable wire electrode and shielding gas.

• TIG welding is slower but produces higher quality welds with less spatter and distortion.

• MIG welding is faster and better suited for thicker materials and high-volume production.

• TIG welding requires more skill and experience, while MIG welding is easier to learn and use.

• TIG weld...read more

Five major losses in industrial work are downtime, defects, inefficiency, waiting, and overproduction.

• Downtime: Refers to the time when production is halted due to equipment breakdown, maintenance, or other issues.

• Defects: Occur when products do not meet quality standards and need to be reworked or discarded.

• Inefficiency: Waste of resources, such as excessive energy consumption or poor utilization of manpower.

• Waiting: ...read more

A CNC machine is a computer-controlled machine tool used for precision machining.

• CNC stands for Computer Numerical Control.

• It uses pre-programmed instructions to control the movement of the machine.

• CNC machines are widely used in manufacturing industries for tasks like cutting, drilling, milling, and turning.

• They offer high precision, repeatability, and automation.

• Examples of CNC machines include CNC mills, lathes, rou

The electrode used in MIG welding is a consumable wire electrode.

• MIG welding stands for Metal Inert Gas welding.

• The electrode is continuously fed through a welding gun and melts to form the weld.

• The wire electrode is made of the same material as the base metal being welded.

• The shielding gas used in MIG welding protects the weld from atmospheric contamination.

• Common types of wire electrodes include ER70S-6 for mild stee

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Manual welding is done by a human operator while robotics welding is done by a machine.

• Manual welding requires a skilled operator to control the welding process while robotics welding is automated.

• Robotics welding is faster and more precise than manual welding.

• Manual welding is more flexible and can be used in a wider range of applications while robotics welding is best suited for high-volume production.

• Robotics weldin...read more