Technical Editor, Author at Polytechnic Hub

Constitutional compounds of portland cement

The properties of cement depend upon the relative proportion of the constitutional compounds present and each of them has different characteristics. When cement comes in contact with water, its constitutional…

Technical Editor March 6, 2015

Mechanical Articles

Modes of Heat transfer

Heat is defined as the energy transfer without transfer of mass across the boundary of the system due to the temperature difference between the system and surrounding. The Process of…

Technical Editor March 3, 2015

Mechanical Articles

Velocity ratio of machine (Formula)

Define velocity ratio of a machine and how it is determined - The velocity ratio (V.R.) of a machine is the ratio of distance moved by the effort to distance…

Technical Editor December 4, 2014

Mechanical Articles

Hoist mechanism and its uses

The mechanism which is used for raising and lowering heavy loads to the desire height by using comparatively small effort is called as hoist mechanism. It is mostly operated with…

Technical Editor December 4, 2014

Mechanical Articles

Advantages and disadvantages of gears

By using gear trains, large velocity ratio can be obtained with minimum space. Gears are mechanically strong, so higher loads can be lifted. Gears are used for transmission of large…

Technical Editor December 4, 2014

Automobile Articles

Various function of piston

A reciprocating component in auto engine or it is called as reciprocating pump or gas compressed. Movement of piston is in cylinder and transfer force of expanding gas via connecting…

Technical Editor December 2, 2014

Textile

Roller singeing machine

Roller singeing machine the singing surface is a rotating cylinder instead of stationary curved plate. It may be made of either cut cast iron and provided with internal firing system. The…

Technical Editor November 26, 2014

Textile

Textile Gas singeing machine

This machine essentially consists of one or more burner given continuous flat or vertical flames produced by a mixture of compressed air and coal gas. The flames issues from a…

Technical Editor November 26, 2014

Electronics Articles

What are the applications of ICs?

Complete electronic circuits in which both passive and active components are fabricated on a single chip of silicon are called as integrated circuit. Applications of ICs Integrated circuits (IC) are…

Technical Editor November 15, 2014

Mechanical Articles

Diagram of velocity time graph

Definition A partial motion in motion with uniform acceleration has different velocities at different instants of time. These velocities can be found out by using the relation v = u…

Technical Editor November 15, 2014