Skip to main content

Inspection and Testing


INSPECTION AND TESTING-
In engineering activities inspection involves the measurements, tests, and gauges applied to certain characteristics in regard to an object or activity. The results are usually compared to specified requirements and standards for determining whether the item or activity is in line with these targets, often with a standard inspection procedure in place to ensure consistent checking. Inspections are usually non-destructive

 Non-Destructive Testing in great variety are in worldwide used to detect variations in structure, minute changes in surface finish, the presence of cracks or other physical discontinuities, measure the thickness of materials and coatings and to determine industrial products.

Some of the most common NDT methods are
Destructive tests on raw materials, welded joints are usually made as part of the approval OF material/ welding procedure or a welder.
Commonly used destructive tests are:
  1. HARDNESS 
  2. BEND 
  3. TENSILE 
  4. CHARPY 
  5. FRACTURE TESTS 
  6. MACRO SECTION 
















Popular posts from this blog

CHARPY V NOTCH IMPACT TEST

CHARPY V NOTCH IMPACT TEST Object : To determine the amount of energy absorbed in fracturing a standardized test piece at a specified temperature. Method : A machined, notched specimen is broken by one blow from a pendulum. Because scatter occurs in the results, at least three specimens are used to assess the joint represented. Testing is carried out at a temperature specified in the appropriate application standard. Reporting Results: Location and orientation of the notch.  Testing temperature. Energy absorbed in joules.  Description of fracture appearance. Location of any defects. The Charpy impact test, measured in joules, is an assessment of TOUGHNESS. Transition temperature (curve) in steel.
Read more

BEND TESTS

BEND TESTS Object:   To determine the soundness of weld metal, heat affected zone and weld zone.These tests may also be used to give some measure of the ductility of the weld zone. It is not usual to use transverse and longitudinal bend tests for the same application. Method:   All specimens to be removed and prepared without causing significant distortion or heating. The cap and root are ground flush. The specimen is bent by the movement of a former of prescribed diameter, the relevant side of the specimen to be placed in tension. Angle of bend and diameter of former should be as specified in the appropriate standard. Reporting Results: Thickness of specimen Direction of bend (root or face) Angle of bend Diameter of former Appearance of joint after bending e.g. type and location of flaws
Read more

Part -1 to 8 Most commonly asked Mechanical Interview Questions with answer

Mechanical Interview Questions with answer Part -1 (published on 14.09.2017) Part -2 (published on 15.09.2017) Part -3 (published on 16.09.2017) Part -4 (published on 18.09.2017) Part -5 (published on 19.09.2017) Part -6 (published on 20.09.2017) Part -7 (published on 21.09.2017) Part -8 (published on 22.09.2017)
Read more