1. What is the differences between 1st angle projection & third angle projection? 2. Define hardness & types. 3. What is the difference between brinell hardness & Rockwell hardness. 4. What is the surface roughness for semi finishing operation. 5. Types of welding & their symbols. 6. Types of tolerences & their symbols. 7. Difference between hole basis system & shaft basis system. 8. Types of fits. 9. H7g6 types & application. 10. Difference between runout & total runout. 11. Difference between profile of a line & a profile of a surface. 12. What is 3-2-1 principle? 13. Machine tools & their various operations. 14. Define bonus tolerences. 15. Sizes of the drawing sheet in ISO & ASME. 16. Metric threads & their pitches. 17. Sizes of the clearance holes again various sizes of the bolt metric as well as inches.

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Answers to various technical questions related to fixture design engineering.

First angle projection and third angle projection are two methods of representing a 3D object in 2D drawings.
Hardness is the resistance of a material to indentation, scratching, or deformation.
Brinell hardness and Rockwell hardness are two methods of measuring hardness.
The surface roughness for semi-finishing operation depends on the material and the required finish.
Types of welding include MIG, TIG, stick, and flux-cored welding.
Types of tolerances include bilateral, unilateral, and limit tolerances.
Hole basis system and shaft basis system are two methods of specifying fits between mating parts.
Types of fits include clearance fit, interference fit, and transition fit.
H7g6 is a type of fit commonly used in mechanical engineering.
Runout is the amount of variation in the axis of rotation of a part, while total runout includes all possible variations.
Profile of a line refers to the shape of a cross-section of a part, while profile of a surface refers to the shape of the entire surface.
The 3-2-1 principle is a method of locating a part in three dimensions using three points.
Machine tools include lathes, milling machines, and grinders, among others.
Bonus tolerances are additional tolerances allowed beyond the specified tolerances.
ISO and ASME have different standard sizes for drawing sheets.
Metric threads have different pitches depending on the diameter of the thread.
Clearance hole sizes depend on the size of the bolt and the required clearance.

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