Mcleod Gauge is an instrument used to measure very low pressures nearly 10-6 Torr. This device is named after its inventor Herbert Mcleod. It was invented by Herbert Mcleod in the year 1874.The shape of the Mcleod Gauge is similar to the mercury manometer which is the most common instrument used for the measurement of pressure….

Streamline flow is the flow in which all conditions at any point in a stream remain constant with respect to time. Properties Of StreamLine Flow:i) In streamline flow, liquid flow per second through any cross-sectional area is constant.ii) Also in streamline flow, at every point, the velocity (both magnitude and direction) of every fluid particle passing through that point…

Fusion welding is the welding process in which two or more materials of similar composition or melting points are joined or fused with each other by melting the materials.In many of the fusion welding processes, the filler material is added to the molten pool of metal required but some fusion welding can be carried out…

A torsion pendulum consists of an inextensible string clamped at one end and fixed to a rigid body at the other end. This simple apparatus consisting of a clamped wire coupled to a rigid body constitutes a torsion pendulum. When the disc or body is given a small angular displacement, the rod or wire will twist….

Compressors are the most prominent devices used in industries to increase the pressure of gases. The screw compressor is a type of positive displacement compressor which achieves this with a pair of rotors. The gases are taken inside the compressor using suction valves. It is made to flow through the rotor and finally discharged through…

Flash welding is a method of welding in which the ends of the workpiece are pressed together during the welding process. Flash welding is a type of resistance welding.In this welding process, a heavy current is passed through the joint.Resistance welding is a type of welding in which resistance is used to develop heat. In…

A vane pump is a positive displacement pump that is used to increase the pressure of the flowing fluid using the vanes which are mounted to a rotor.This pump can be used to flow the fluid from one point to another at high pressure.The vanes in the vane pump can have the variable-length or can be tensioned…

Gear Pump is one type of positive displacement rotary pump. In a gear pump, a fluid moves by enclosing a fixed volume of fluid using the interlocking gears and then transferring it as the gear rotates.This pump delivers a pulse-free flow that is directly proportional to the rotational speed of the gears.The gear pump is mainly used for…

Cone Clutch is a type of frictional clutch. It is used to engage and disengage engine shaft to the transmission box shaft while changing gear ratio.Cone clutch uses two conical surfaces to transmit torque by friction. One surface is called male member and another one is called female member.Cone clutch is easier to engage and…

utocollimator is an optical instrument that is used to measure small angular differences.This device is very sensitive to change in angles and provides a very accurate measurement of angular differences. It is basically a combination of an infinity telescope and a collimator.Autocollimators are mainly used to align optical components and measure optical and mechanical deflections….