IT'S ME

SHRI SHIRDI SAI INSTITUTE OF SCIENCE AND ENGINEERING

VADIYAMPETA – ANANTAPUR

IV B.Tech- I Sem :: Mech. Engg.,

INSTRUMENTATION AND CONTROL SYSTEMS

QUESTION BANK

                        

    Prepared by: Dr. S.l.V.Prasad

UNIT- I

1.      What do you mean by instrumentation?

2.      What is measurement system and explain its elements?

3.      Explain the function of various elements in a generalized measuring system thrash a block   diagram.

4.      What are the different measurement methods? Explain briefly.

5.      State and explain the desirable static characteristics of an instrument?

6.      Explain its dynamic characteristics of measuring systems.

7.      Draw a block diagram representation of a generalized measurement system. Identify the various elements and point out the function performed by each element.

8.      What are the different types of errors in the measurement? Explain briefly

UNIT- II

1.      What are transducers and how are they classified?

2.      Explain the operating principle of an LVDT with a diagram.

3.      Describe, with a sketch, the working principle of the inductive transducer.

4.      Explain with a sketch, the working principle of the ionization transducer.

5.      Describe the working principle of an electrical resistance thermometer.

6.      Describe the working principle of a radiation pyrometer with a diagram.

7.      Explain with a sketch, the working principle of the capacitive transducers.

8.      List the advantages and disadvantages of capacitive transducers.

9.      Describe the principle of operation of a piezo-electric transducer. Identify the input and output of the system.

UNIT- III

1.      Describe, with neat sketch any one method of low pressure measurement.

2.      What is diaphragm pressure gauge? Explain its operation.

3.      Explain the concept of pressure measurement using diaphragm gauges.

4.      Define the following terms:

(i)      Absolute pressure (ii) Gauge pressure (iii) Vacuum pressure.

5.      Describe the working principle of pirani gauge with neat sketch.

6.      Explain the working of a bellows pressure gauge.

7.      What is a differential manometer? Explain its principle of operation.

8.      Explain with a neat sketch the constructional features and working principle of McLeod gauge used for the measurement of low pressures.

UNIT- IV

1.      Explain the working principle of  rotometer with a neat diagram.

2.      What are bubbler level indicators? Describe their working.

3.      Describe the working principle of a turbine flow meter with a neat diagram.

4.      What are cryogenic fuel level indicators? Describe their working

5.      With a neat sketch, explain the operation of a magnetic flow meter.

6.      Explain the working principle of an ultrasonic fluid level detector.

7.      Describe, with a neat sketch, the principle of operation of a laser Doppler anemometer.

8.      Explain the working principle of a capacitance type fluid level detector.

9.      Distinguish between the direct and indirect modes of level measurement.

10.   Explain the working of capacitive liquid level sensor with a neat sketch.

UNIT- V

1.      Explain the working principle of a vibrometer with a neat sketch.

2.      Explain the principle of operation of any one non-contact type tachometer.

3.      Describe the working principle of a piezo-electric accelerometer

4.      Sketch and explain the working principle of eddy current tachometer.

5.      Explain how a vibrometer is calibrated to measure acceleration.

6.      Explain the following:

(i)      Stroboscope (ii) Accelerometer

7.      Describe with sketches the basic principle of working of a stroboscope for speed measurement.

8.      Explain the principle of operation of electrical tachometers.

UNIT- VI

1.      Explain the procedure to measure axial strain using strain gauges.

2.      Explain the procedure to measure strain due to bending, using strain gauges.

3.      What is temperature compensation in strain gauge? How is it achieved?

4.      Distinguish between two-gauge bridge system and far-gauge bridge system for strain measurement.

5.      How do you use a resistance strain gauge to measure compressive strain? Explain.

6.      What is strain gauge rosette? Explain its importance.

7.      Name the various types of strain gauges for different application.

8.      Distinguish between bonded and unbounded type of strain gauge.

9.      Define gauge factor of a resistance strain gauge.

10.   Distinguish between bonded and unbounded type of resistance strain gauge.

UNIT- VII

1.      Explain the working principle of a sling psychrometer with a neat sketch.

2.      Describe how the torque and power are measure of by using a prony brake dynamometer.

3.      How is a hydraulic cell used for force measurement? Explain.

4.      Describe the working principles of a dew point meter with a neat sketch.

5.      Describe how the torque and power are measured by using a rope brake dynamometer.

6.      Explain the working principle of dew point meter with neat sketch.

7.      Describe the working principle of a absorption pychrometer with a neat sketch.

8.      Describe how the torque and power are measured by using eddy current dynamometer.

9.      Explain the working of sling psychrometer for the measurement of humidity.

UNIT- VIII

1.      What are the different types of control system? Explain them with block diagrams.

2.      Draw the block diagrams of open loop and closed loop control system and discuss the differences between them.

3.      Explain the temperature control system with a neat sketch.

4.      Explain the speed control system with neat sketch

5.      What is a servo mechanism? Where it is used.

6.      Explain the position control system with a neat sketch.

7.      Explain any one control system with a neat sketch. Briefly explain the working principle of servomechanism.