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Define Black & White Fathometer - Non-Destructive Testing?
Most commonly used sounding device is black & white fathometer. The units are compact and easy to use. They consist of a transducer, which is suspended in the water, a sending/receiving device, and a recording chart, which displays the depth on paper. High frequency sound waves, generally in the range of 200 kHz, emitted from the transducer travel through the water until they strike the channel bottom and are reflected back to the transducer. The fathometer measures the time it takes the sound waves to return to the transducer, and converts that time to the depths of water, which are displayed on a graphic recorder in the form of a continuous plot of the channel bottom.
Types of Pavements: On the basis of structural performance of pavements, there are basically two types of pavements: (a) Flexible, and (b) Rigid. A flexible pavement
Cargo Handling Facilities: All water transport terminals require cargo handling facilities. Cranes of various sizes are used. In docks, traveling cranes are popular (Figure).
Primary effluent wastewater at 60 o F (v = 1.217 x 10 -5 ) is pumped to the top of a trickling filter (TF) a total of 75 vertical feet through schedule-40 welded steel pipe. The fl
A retaining wall 9 m high retains granular fill weighing 18 kN/m 3 with level surface. The active thrust on the wall is 180 kN per metre length of the wall. The height of the wall
Define the Alternate Depths In open channels, two alternate depths of flow have the same energy for the same flow rate. As shown in the figure, the hyperbolic plot of energy (x
Earthquake force analysis method Dynamical method In contrast with the static loading, dynamical analysis method is discussed. In this method, structure reflections at any poin
uses of Earth moving equipment
Maintenance of Airport Pavements: Maintenance Elements The maintenance of airport pavements is an important task of a civil engineer, since the safe movement of aircr
Q. Write short notes on Numerical rating of Bridges? In the numerical rating system, the condition of a bridge is represented by a number consisting eight digits. This eight di
We need all types of Upper floor
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