JNTU B.Tech II TRANSDUCTION OF PHYSICAL VARIABLES Previous Question Paper (November/December - 2017 - R13)

Define Variable manipulation element in an instrument. Give example.

Draw the block diagram of the method of high gain feedback type of correction for interfering and modifying inputs.

Give an example of zero order instruments and write the expression for it.

Define Settling time. What is the effect of settling time on the response of the system?

Write down the differences between total immersion thermometer and Partial immersion thermometer.

Draw the Resistance /temperature curve for a thermistor and briefly explain it.

Define Sound Pressure level SPL.

Name the two basic principles on which the flow visualization schemes work. Briefly explain.

Write down the equation for volume flow rate of a Rota meter and briefly explain it.

Explain the principle of Drag flow meter.

Differentiate International Standard and Absolute Standard.

The expected value of the voltage across a resistance is 90V. However the measurement gives a value of 79V. Calculate (i) Absolute error (ii) Relative accuracy (iii) % error and (iv) % of accuracy.

With generalized input output configuration explain desired input, interfering input and modifying input and their effects on the instruments.

Describe the Resistance Standard and its advantages.

Derive the transfer function of a thermal system when the heat input rate is suddenly increased from its steady conditions. Discuss the assumptions made.

Obtain the frequency response of first Order System. Discuss the effect of time constant on the measurement accuracy.

Describe the frequency response of Second order instrument. Obtain the Impulse response for it.

What is terminated ramp signal? Briefly explain.

Identify the gages which work on the measurement of viscosity for the pressure measurement. Describe the construction and working of any one of the gauge.

Draw the resistance-thermometer bridge circuit that is used when highest accuracy is required and explain the working of resistance Thermometer.

Explain about the principle of operation of Pyroelectric detector with neat schematic. Also draw the frequency response.

Explain the measurement of pressure using Vibrating Cylinder pressure sensors in detail.

List out the advantages of Laser Doppler Velocimeter and describe its working.

With neat schematic of basic McLeod gage explain the measurement of low pressure.

What is the purpose of Obstruction meter in measurement? Draw and explain an obstruction meter.

State the condition of flow during which Vortex Shedding flow meter is appropriate to use. Explain it in detail.

Explain the construction, working and theory of an Electromagnetic flow meter. Give the comparison of its operation when it is excited by (i) dc and (ii) ac.

Differentiate Averaging Pitot tube from Static Pitot tube. Explain Averaging Pitot tube.