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2. Electrometer - Wikipedia

   en.wikipedia.org/wiki/Electrometer

   The Bohnenberger electrometer, developed by J. G. F. von Bohnenberger from an invention by T. G. B. Behrens, [1] consists of a single gold leaf suspended vertically between the anode and cathode of a dry pile. Any charge imparted to the gold leaf causes it to move toward one or the other pole; thus, the sign of the charge as well as its ...

3. Scratch hardness - Wikipedia

   en.wikipedia.org/wiki/Scratch_hardness

   Scratch hardness test or scratch test refers to any of a number of methods of measuring scratch hardness. Resistance to abrasion is less affected by surface variations than indentation methods. Scratch hardness is measured with a sclerometer. [1] Attempting to scratch a surface to test a material is a very old technique. [2]

4. Principles and Practice of Engineering exam - Wikipedia

   en.wikipedia.org/wiki/Principles_and_Practice_of...

   The PE exam is a professional exam much like the examinations required for public accounting, law, and other professions for which protection of the public is of the utmost concern. Consequently, exam candidates typically spend large amounts of time preparing for the exam. [ 6 ]

5. Sclerometer - Wikipedia

   en.wikipedia.org/wiki/Sclerometer

   The Turner-Sclerometer test consists of measuring the amount of load required to make a scratch. [1] [2] In test a weighted diamond point is drawn, once forward and once backward, over the smooth surface of the material to be tested. The hardness number is the weight in grams required to produce a standard scratch.

6. Liver scratch test - Wikipedia

   en.wikipedia.org/wiki/Liver_scratch_test

   The liver scratch test can be used when other exam techniques used to approximate liver size are ineffective or unavailable [2] and is thought to be most useful if the abdomen is distended, too tender for direct palpation, the abdominal muscles are too rigid, or the patient is obese. [3]

7. Scratch test (disambiguation) - Wikipedia

   en.wikipedia.org/wiki/Scratch_test_(disambiguation)

   A Scratch test may refer to: The skin allergy test used in the medical diagnosis of allergies; Scratch hardness tests, such as Mohs scale of mineral hardness, used to measure the scratch resistance of various minerals; Liver scratch test, used by medical professionals to ascertain the location and size of a patient's liver during a physical ...

8. Skin allergy test - Wikipedia

   en.wikipedia.org/wiki/Skin_allergy_test

   A person receiving a skin allergy test. A microscopic amount of an allergen is introduced to a patient's skin by various means: [1] Skin prick test: pricking the skin with a needle or pin containing a small amount of the allergen. [2] Skin scratch test: a deep dermic scratch is performed with help of the blunt bottom of a lancet. [3]

9. Electrical safety testing - Wikipedia

   en.wikipedia.org/wiki/Electrical_safety_testing

   An insulation resistance test (IR test) measures the electrical resistance of insulation by applying a voltage between two locations, and measuring the resultant current flow. Proper safety precautions must be taken when doing this test, such as exclusion zones, making sure no wires are exposed, and personal protective equipment is worn.