The subject ‘Theory of Machines’, also known as ‘Mechanics of Machines’, comprises: (i) the study of the relative motion between the parts of a machine, and (ii) the study of the forces which act on those...
Tag - Mechanical
In an I.C engine, moving parts rub against each other causing frictional force. Due to the frictional force, heat is generated and the engine parts wear easily. Power is also lost due to friction. To reduce the power loss and...
In S.I engine, the knocking occurs at the end of combustion whereas in C.I engine knocking occurs at the very beginning of combustion. The detonation in the S.I engine is of a homogeneous charge causing very high rate of pressure...
In petrol engines, a carburetor is employed to mix air and fuel supply system in the desired ratio. But in diesel engines, air alone is compressed in the cylinder. The high pressure is about 35 to 40bar and the temperature of...
It is employed in petrol engines. Fig shows the wiring diagram of a simple coil battery ignition system of a four cylinder engine. This system is used in automobiles. Construction: It consists of a battery, ignition coil...
In magneto ignition system, the battery is replaced with a magneto. Fig. shows the wiring diagram of a magneto ignition system. It consists of a switch, magneto, contact breaker, condenser, distributor and spark plugs. This...
Systematic and Random Errors in Measurement Systematic error is usually divided into two different categories: Instrumental errors Environmental errors Instrumental error : These errors are due to shortcomings of the...
Errors in measurement = Measured Value – True value Error is the different between the measured value and the true value. The errors in measurement can be expressed either as an absolute error or an relative error. Absolute...
The types of carburetor can be classified according to the following considerations. Carburetors are used almost all SI engine for the preparation of combustible air fuel mixture as a charge. Types of carburetor are : According...
In two stroke cycle engine, one working cycle is completed in two strokes of the piston (one up and down movement) or one revolution of the crankshaft. Hence, it is called as two stroke engines. One working cycle consists of the...