Answer / m.murali- inst.technologist

Rate of frequency of vertices after the bluf body is
directly propositional to flow

Answer / sanjay lashkari

vortex flowmeters utilise the phenomenon called vortex
shedding that occurs when a fluid flows against a
non-streamlined obstruction, termed a bluff body. the
peripheral layers of the fluid are unable to follow the
defined contours of the bluff body & seperate from its
surfaces to form vortices that are swept downstream. (
kamran vortex street).
the shedding frequency is directly proportional to the free
velocity over a wide range of flow, excluding the laminar
region.
these vortices manifest themselves as sinusoidal pressure
variations.these pressure variations are converted in to
sinusoidal current signal.

Answer / k.surya mutyalaro

in fluid pipe the vertices generated by the bluf body is
directly propositional to flow...and this measrement can b
in any sort , like frequency and also resistance ... the
frequency by means of ultrasonic trx and rx.... resistance
is by strain guages...but this method is better for fluids
of turbulant , for laminar flows those instrument methods r
less sensitive to respond.

Answer / elsayem

when flow hit the bulf body it creates a vorteces
proprtional to flow

Answer / goldengineer14

The principle of a vortex flowmeter’s operation is based on a phenomenon of vortex shedding
known as the Von Karman effect of flow across a bluff body. A bridge pier in a river generates
Von Karman vortices. The principle states that flow alternately sheds vortices from one side to
the other side of a bluff body. The frequency of the shedding is directly proportional to fluid
velocity across the body. As a fluid passes the bluff body it separates and generates small eddies
or vortices that are shed alternately along and behind each side of the bluff body.
The output of the vortex flowmeters depends on the K-factor. The K-factor relates the frequency
of generated vortices to the fluid velocity. The K-factor varies with the Reynolds number, but is
virtually constant over a broad flow range. Figure 71 shows the relationship between two
numbers. The formula for fluid velocity is
Fluid velocity =Vortex frequency/K - factor

Answer / mrfa

It has crystal's inside when process pushes they create
milivolts .

Answer / mrfa

It has crystal's inside when process pushes they create
milivolts .

Paper Details: company -- Hindustan Copper Limited post -- GET 2008 Date -- 03.08.2008 Dept.-- Electronics?Instrumentation Aptitude -- 70 Technical-- 80 Total Time -- 2hr 30min I have listed the question I could able to remember 1. BCD equivalent of 43 2. value of K for stability of a system from a given equation 3. transformer connection for darlington connection 4. damping of balastic galvanometer 5. advantage of chart-pen recorder over CRo 6. CRO - how to change bandwidth 7. questions on CRO construction 8. reverse saturation current of si diode 9. advantage of wire wound resistance over carbon resistance 10. core material for a small coil 11. max fanout-- TTL/ECL/CMOS/MOS 12. component of resistance of monolithic IC 13. functions of capacitors in multivibrators 14. to change a sawtooth signal into a square wave we use-- schmit trigger/ schottkey diode/ zener diode 15. relation b/w á & â in transistor ckt 16. function of SiO2 layer in fabrication 17. 3 questions on ODD MAN OUT

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