Technical Editor, Author at Polytechnic Hub

Digital theodolite

Digital theodolites differ in detail from the older venire models, although in general principals they are much the same. However, these are becoming popular because digital theodolites are light and…

Technical Editor May 9, 2018

Civil Engineering

What is digital planimeter

The planimeter is used for finding out areas of irregular figures on sheet there is a number of formulae available for calculating areas of regular figures, but the actual problem…

Technical Editor May 9, 2018

Civil Engineering

Applications of the digital theodolite

To measure the horizontal angle and vertical angle between two points accurately up to a precision of "1”[ one second]. To check the alignments of roads, railways track tunnel and…

Technical Editor May 9, 2018

Civil Engineering

Application of laser

Uses of the laser in construction The laser beam is used for cutting the steel plates with construction work is precisely done. The laser beam is used to find the…

Technical Editor May 9, 2018

Electrical Articles

Explain role of back of emf in controlling armature current

Back of emf in controlling armature current [ back emf as a current register] voltage eqn for dc motor is Ia(V-Eb)/(Rb) Back EMF is the system in the coil of…

Technical Editor May 8, 2018

Electrical Articles

Working principle of mercury vapor lamp

The extensive use of the mercury vapor lamp depends entirely upon the versatility of the mercury vapor as regards pressure, temperature, voltage and other characteristics, each change resulting in a…

Technical Editor May 8, 2018

Electrical Articles

Working principle of fluorescent lamp

Fluorescent lighting has a great advantage over other light sources in any application. The tubes can be obtained in a verity of lengths. With illumination in a variety of colors.…

Technical Editor May 8, 2018

Civil Engineering

Types of concrete

Concrete can be broadly classified into following: Plain cement concrete [P.C.C] It is obtained by making mixing cement, sand and coarse aggregates with an adequate quantity of water. P.C.C. is…

Technical Editor May 8, 2018

Civil Engineering

Types of maps and their uses

The most relevant maps in the field of civil engineering are as follows. Topographic maps Topographic maps show a 3-dimensional world in 2 dimensions by contour lines. Engineers use topographic…

Technical Editor May 8, 2018

Civil Engineering

Sources of eco-friendly materials

Following are the source of eco-friendly materials Renewable source Renewable energy is energy generated from natural resources. As an eco-friendly construction material wood from certified forests in the best renewable…

Technical Editor May 8, 2018