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 compact and with a distomat attachment, these
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 arises when the figure is irregular. Planimeter
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 bridges. It is used in the prolongation
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 elevation between the different point in vertical
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 an electric motor that opposes the current
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 lamp of different spectral quality and efficiency.
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. It is possible to active quite high
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 very strong in compression and very weak
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 maps when they are planning roads, buildings,
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 source. Reuse of water From various sources