Mechanical learning

                         ENGINEERING MECHANICS  1. A force is completely defined when we specify          (a) magnitude          (b) direction          (c) point of application          (d) all of the above 2.  Which one of the following is not a scalar quantity?          (a) Volume          (b) Mass          (c) Force          (d) Length 3.  The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the    resolved part of their resultant in the same direction. This is known as-          (a) Principle of resolution of forces          (b) All of the options          (c) Principle of transm...

        GENERAL PHYSICS PYQ'S  1.The commercial unit of electrical energy is .........                 (a) Watt                (b) Calorie           (c) Kilowatt hour           (d) Joule   2. The S.I. unit of resistivity is:                (a) ohm/m           (b) ohm           (c) mho            (d) ohm m 3. The S.I. unit of resistance is equivalent to:                   (a) joule/coulomb           (b) volt/ampere           (c) ampere/volt           (d) coulomb/joule 4. Newton is the unit to measure ______.        ...

  Limit Gauges:- → Limit gauges are non-recording type inspection devices which is used to check the dimension of the product produced lies within the permissible limit or not.  → if on inspection the dimension of the product produced lies within the permissible limit then the product is accepted.   → but if on inspection the dimension of the product produced does not lie within the permissible limit then the product is rejected. →I n the manufacturing industry the product produced is either of two natures either it will be a shaft or it will be a hole. we have to take the measurement to check its accuracy. but when the production rate is high we cannot choose the method of measurement which is time-consuming  →Therefore to check the manufactured component accuracy within less time We use  a special type of inspection device called limit gauges   →limit gauges are non-recording type inspection devices i.e. they do not give the reading of the dimension ...

 Disaster:-                         A Disaster refers to a sudden or extreme event that causes significant damage, destruction, or disruption, resulting in human, economic, and environmental losses that exceed the ability of the affected community or society to cope using its own resources. Disasters can be natural(such as earthquakes, floods, hurricanes)or human-made(such as industrial accidents, terrorist attacks).    → A disaster can be defined as an event that occurs in most cases suddenly and unexpectedly, causing severe disturbances to people, or objects affected by it, and resulting in loss of life and harm to the health of the population, the destruction or loss of community property and severe damage to the environment. → A disaster is a natural or manmade event that negatively affects life, property, livelihood, or industry often resulting in permanent changes to human societies, ecosystems, and th...

  Angle measuring instrument:-   →   The instrument which is used for measurement the slope of any object surface is called angle measuring instrument . →T here are 3 types of angle measuring instrument.     ( I)Sine bar                   ( II)Clinometer     ( III)Bevel Protector                         SINE BAR:- → sine bar is an angle-measuring instrument that measures slope of any object with the help of slip gases and a dial indicator. → it is a steel piece mounted over two hardened steel cylindrical roller having equal diameter. → To make it lighter in weight small holes are drilled along steel piece. Principle:- →The working of sine bar is based on the princiople of trigonometry.  In this one roller is placed over combination of slip gauges and another is placed over table surfaces. →If H is the height of slip gauge c...

  Measurement:-                         Measurement is a process of comparison between a pre-defined standard and an unknown physical quantity with the same unit. Metrology:-                    The word, metrology consists, of two words, one is metro which indicates metric which means measurement and the other is logy which indicates technology, which means science behind the measurement. The essential character of Standard:-  1. it should be easily readable and understandable.  2. it should be properly defined and universally acceptable.   3. it should be by the size of the quantity to be measured.  4. it should not change its character i.e.physical dimension concerning changes in place, time, and environmental condition. Standard in Measurement   → Standards are basically the references used in measurement from which we derive the value ...