Search results
Results from the WOW.Com Content Network
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]
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.
PE Electrical and Computer: Computer Engineering 21 62% 7 29% PE Electrical and Computer: Electrical and Electronics 104 78% 43 60% PE Electrical and Computer: Power 1003 66% 509 38% PE Environmental 242 62% 114 37% PE Fire Protection 148 64% 72 38% PE Industrial and Systems (April 2016) 72 78% 15 13% PE Mechanical HVAC and Refrigeration 495 83%
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 ...
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 ...
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]
Electronic test equipment is used to create signals and capture responses from electronic devices under test (DUTs). In this way, the proper operation of the DUT can be proven or faults in the device can be traced. Use of electronic test equipment is essential to any serious work on electronics systems.
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]