## EI2201 Electrical Machines ANNA UNIVERSITY PREVIOUS YEAR MODEL QUESTION PAPER - for EIE Department (huge Collections) ...

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A

Department of Electronics and Instrumentation Engineering
EI 2202 – ELECTRICAL MEASUREMENTS
MODEL EXAM

E.I.E / I.I Year / I.I.I Semester                                                                    Total Marks: 100

Part – A                                            (10 * 2  - 20)
(Answer all the questions)

1. Classify the instruments based on their function.

2. Write the principle of moving coil instruments.

3. Define phantom loading.

4. Explain about watt meter and energy meter.

5. A 5 A  , 230 V meter on full load unity power factor test makes 60 revolutions in              360 seconds. If the normal disc speed is 520 revolution per KWh, what is the                          percentage error?

6. What is the basic principle of Potentiometer? Mention its types.

7. Write the application of AC potentiometer.

8. Explain about Potential transformer and state the use of potential transformer.

9. Name the methods used for low resistance measurements.

10. How the resistance can be measures using direct deflection method.

Part B                                      (16*5 – 80)

11. (i) Derive the Generalized Equation for A.C Bridges at Balance Condition.

(ii)  Explain about Maxwell Bridge and Wein’s Bridge.

12.(a) (i) Explain briefly about D’ Arsonval Galvanometer with Torque Equation.

(ii) What are the Generalized Errors occurred in the Instruments, explain in
Detail
(or)

12.(b)Explain briefly about PMMC and PMMI instruments with Torque equation.

13.(a) What do you mean by wattmeter? Explain briefly about electrodynamometer
Type Wattmeter with toque equation.

(or)

(b) Explain briefly about wattmeter for a long period and derive the Torque

Equation for Energy Meter and mention what are errors occurred in the

Energy Meter.

14.(a) (i) what is meant by Potentiometer and  standardization of Potentiometer.

(ii)Explain briefly about Laboratory type(DC) and mention its application.

(or)

14.(b)(i) what do you mean by Instrument Transformer.

(ii) Explain briefly about CT and PT with relevant Diagrams.

15.(a).(i) classify the resistance based on the range of the Measurement.

(ii) What are the methods can be used for the Measurement of Low resistance

and explain briefly about Kelvin bridge and Kelvin Double Bridge with
relevant diagram and equation.

(or)

15.(b)(i) What are the methods can be used for measurement of  High resistance?

(ii) Explain briefly about Megger, Earth Resistance measurement &

Earth Tester

B

Department of Electronics and Instrumentation Engineering
EI 2202 – ELECTRICAL MEASUREMENTS
MODEL EXAM

E.I.E / I.I Year / I.I.I Semester                                                                    Total Marks: 100

Part – A                                            (10 * 2  - 20)
(Answer all the questions)

1.  Write the principle of D’arsonval galvanometer.

2. What is meant by calibration? Why it is important.

3.  What do you mean by LPF wattmeter?

4.  The constant of  a 230V , 50Hz single phase energy meter is having 185                             revolutions              per KWh. The meter takes 190 seconds for 10 revolutions while                      supplying a non inductive of 4.5 A at normal voltage. What is the percentage error                of the instrument?

5. What do you mean by potentiometer? Mention its types.

6. Define standardization of potentiometer.

7. Write the application of CT and PT.

8.  Classify the resistance based on the range of the measurement

9. Explain about price guard wire method for high resistance method.

10. What are the errors in the A.C bridges?

Part B                                      (16*5 – 80)

11.(i) Derive the generalized equation for measuring the Impedance in the A.C bridge

Circuit at balance condition.

(ii) Explain about Schering Bridge and Anderson Bridge.

12. (i) What do you mean Galvanometer? Explain briefly about any one the
Galvanometer with Torque Equation.

(ii) Explain about Gross , Systematic and Random Errors.
(or)
12.(b) Explain briefly about Moving Coil and Moving ion Instruments with Torque
Equations.

13.(a) Explain Briefly about Induction type Energy Meter with Torque Equation and

mention what are errors occurred in the Energy Meter.

(or)

(b) (i) What is meant by Phantom Loading? Explain briefly about Phantom

Loading with testing of AC meter.

(ii) Explain about LPF wattmeter with relevant Diagram.

14. (a) Explain Briefly about Polar type and Coordinate type Potentiometer.

(or)

(b) Explain briefly about Current and Potential Transformer with relevant
Diagram.

15. (a) (i) Classify the resistance based on the range of measurement.

(ii) Explain about measurement of Medium Resistance by using Ammeter –
Voltmeter Method. Wheatstone Bridge Method.

(or)

(b)  What are the methods can be used for measurement of Low Resistance and

Derive the Equation for measuring the Low resistance using  Thomson Bridge and

Thomson Double Bridge.

C

Department of Electronics and Instrumentation Engineering
EI 2202 – ELECTRICAL MEASUREMENTS
MODEL EXAM

E.I.E / I.I Year / I.I.I Semester                                                                    Total Marks: 100

Part – A                                            (10 * 2  - 20)
(Answer all the questions)

1.  Write the principle of Moving iron Instruments.

2.  Write the generalized errors occurred in the measuring instruments.

3.  Explain about electrodynamometer type wattmeter.

4. A 5 A, 240 V meter on full load unity power factor test makes 50 revolutions in               350 seconds. If the normal disc speed is 580 revolutions per KWh, what is the                        percentage Error?

5. Write the principle of Current Transformer and Potential Transformer.

6. Classify the potentiometer and mention its applications.

7. Explain about Earth resistance measurements.

8. Define megger and mention its application.

9.  Name the method used for medium resistance measurement.

10. Explain about vibration Galvanometer.

Part B                                      (16*5 – 80)

11. (i) Derive the Generalized Equation for Measuring the capacitance and
Inductance in the Alternating Current bridge Circuit at balance condition.

(ii) Explain about Campbell Bridge to measure mutual Inductance.

(iii) write the errors in A.C Bridge methods .

12.(a)   Explain in detail about Permanent Magnet Moving Coil Instruments and

Permanent Magnet Moving Iron Instruments with Torque Equation.

(or)

12. (a)(i) Explain briefly about D’Arsonval Galvanometer with Torque Equation.

(ii)  What are the Generalized Error Occurred in  Instruments Explain Briefly.

13.(a).(i) Explain Briefly about Energy Meter with Torque Equation.

(ii) Derive the Equation for D.C and A.C Power Measurement.

(or)

13.(b) (i) Derive the equation for A.C and D.C power Measurement.

(ii) Explain About Calibration of Wattmeter and Energy Meter with relevant                            Diagrams.

(iii) Explain about LPF Wattmeter with relevant Diagram.

14. (a) Explain in detail about Drysdale and Gall –Tinsley type Potentiometer.

(or)

14.(b) Explain in detail about Application of A.C and D.C Potentiometer with Neat                      Diagram.

15.(a) (i) What are the Methods can be used for Measuring the LOW , MEDIUM  and

HIGH Resistance.

(ii) Explain in detail about Megger, Direct deflection Method, Earth

Resistance Measurement and Earth Tester.

(or)

15.(b) Derive the Equation for Wheatstone Bridge and Kelvin Bridge and Kelvin

Double Bridge.

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