DEPARTMENT OF MECHANICAL ENGINEERING

  Classification of linear measurement instrument -  construction and the principles only - steel rule What is Linear Measurement? Linear measurement is the measurement of the distance between the two points or objects, or it can also be defined as the gap between the leftmost end and the rightmost end. Linear measure refers to measurements that are directly proportional to the distance traveled along the axis of the measurement. For example, the length of your dining table, the height of a chair, the distance from your hall to the kitchen,  all these come under the examples of linear measurement. Types of Linear Measurement Devices Linear measurement is achieved by various instruments, depending on the type of instrument used for measurement. It can be divided into a direct measurement method, an optical measurement method, and an electronic measurement method. Direct Measurement Method It is obtained by using some simple measurement equipment. The direct measurement met...

  Selection of measuring instruments - symbols for metallurgical terms (ASME and ISO) Selecting the right industrial instrument is critical for ensuring accuracy and reliability in measuring process variables in industries such as manufacturing, chemical processing, and power generation. In this article, we'll discuss the key factors to consider when selecting industrial instruments. 1.   Measuring Range and Accuracy: One of the most critical factors to consider when selecting an industrial instrument is its measuring range and accuracy. It's important to choose an instrument that can accurately measure the range of process variables that need to be monitored. Additionally, the instrument's accuracy should be sufficient for the application, as inaccuracies can result in costly errors or production issues. 2.   Environmental Conditions: Industrial instruments are often subjected to harsh environmental conditions, such as extreme temperatures, humidity, and corros...

  Error - sources of errors - classification of error - compare systematic error and random error An error may be defined as the difference between the measured and actual values. For example, if the two operators use the same device or instrument for measurement. It is not necessary that both operators get similar results. The difference between the measurements is referred to as an ERROR. To understand the concept of measurement errors, you should know the two terms that define the error. They are true value and measured value. The true value is impossible to find by experimental means. It may be defined as the average value of an infinite number of measured values. The measured value is a single measure of the object to be as accurate as possible. Types of Errors There are three types of errors that are classified based on the source they arise from; They are: Gross Errors Random Errors Systematic Errors Gross Errors This category basically takes into account human oversight and...

Precautions for use of instruments so as to avoid in accuracy in measurements-reliability   Proper use and care of precision measuring tools is very important if accuracy and reliability are to be maintained.   Here are some guidelines to follow much of which is just common sense. 1. Measuring a work piece (on a lathe) should be carried out only after the work piece has stopped moving; otherwise, there could be wear on the measuring faces and the accuracy of the tool may be compromised. 2. Wipe the measuring faces of a precision measuring tool and the to-be-measured surface of the work piece to prevent the measuring accuracy from being negatively affected by dirt or dust.  It is not advisable to use a precision tool such as a vernier caliper, micrometer or dial indicator to measure forged roughcasts or abrasive-bearing pieces, i.e. carborundum, because the measuring faces will be abraded and accuracy will diminish. 3. Never put precision measuring tools together with...

  Different Parts of the Engine and their Function: Cylinder Block Cylinder Head Piston Piston Rings Connecting Rod Crank Crankshaft Combustion Chamber Manifold Intake Manifold Exhaust Manifold Intake and Exhaust Valves Gudgeon Pin or Piston pin Spark Plug Fuel Atomizer or Injector Poppet Valves Carburetor Flywheel Engine Bearing Governor Push Rod Rocker Arm Catalyst Converter Supercharger Turbo Charger Radiator Fan Timing Belt Fuel Tank Sensor Water Pump 1. Cylinder Block: Cylinder Block  is the main part of the IC (Internal Combustion) engine. It is the part where all the functions of the engine take place inside it, such as intake, Suction, Compression, Combustion, Exhaust, etc. The function of the cylinder in IC engines is to hold the fuel and guide the  piston . The cylinders are made of  Cast iron and Cast steel  by the  process of casting  to handle all the temperature and pressure which is generated after the combustion of fuel. So the cylinder...