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Model Question Paper-I

Part A

1.  Write a formula of instruments efficiency.
2.  List the Three Operation forces.
3.  What are the 2 Types of MI instruments?
4.  State the use of Megger.
5.  What is the control torque in  LPF wattmeter?
6.  List 2 errors of induction type’s energy meter.
7.  Mention the use of Synchroscope. 
8.  Write the use of Schering bridge.
9.  Define the transducers.
10. Mention any two uses of ultrasonic.

Part B

11. Explain any 3 effects used in an instruments?
12. What are the requirements of ammeters shunt?
13. List the types of wattmeters?
14. Mention the application of X- Y Recorders?
15. Write short notes a “Digital encoding transducers”

Part  C

16. a) Explain the following   
       Air Friction damping              (5)
      Fluid friction damping             (5)
                         (or)
 b)     (i)Define i) True value ii) Accuracy.  (4)
(ii)Compare Spring and Gravity control.   (6)
 
17.  a) With a neat sketch and explain PMMC instruments?
                          (or)
     b) (i) Explain with a sketch the working of series types Ohm meter?    (5)
          (ii) Write short notes and the various types of sweeps in a CRO?    (5)
 
18. a) Write short notes an  “CREEP”. How will you present. Draw the sketch of 3 phase  
          two element wattmeters?
                           (or)
      b) Explain the working of dynamometers type wattmeters. ?
 
19. a) With a block diagram explain the working of a Digital Multimeter?
                           (or)
       b) (i)What are the types of frequency meters?          (4)
           (ii)Draw Anderson bridge and Write down formula obtained?.    (6)
 
20. a) Describe with a neat sketch the working of LVDT
                          (or)
      b) (i)Explain the principle of Capacitive Transducers?        (5)
          (ii) Explain how you will measure the angular velocity using DC Tachometer generator?p; (5)

Model Question Paper-II

Part  A

1.  Mention the type of scale in moving iron instrument.
2.  In under damped instrument when the final value will be obtained
3.  Mention the instrument used for measure the current with out connecting in the
circuit. 
4.  Write  the coating used in  CRT screen.
5.  Mention the purpose of providing a hole in the disc of Energy meter.
6.  Mention the purpose of current transformer.
7.  Write the quantities measured by trivector meter
8.  State the bridge used to measure high voltage capacitance.
9. Expand LVDT.
10. Differentiate between positive temperature co- efficient and negative
temperature co-efficient.

Part B

11. Mention the various effects used in instruments for measurement.
12. Write a note on earth tester?
13. Draw the connection diagram of connection 3 phase two element wattmeter to
a 3 phase load.
14. Give a brief account on phase sequence indictor.
15. Define electrical transducer. Mention its types.

Part C

16. a) List various operating forces in instruments. Explain the need for each.
                              (or)
         b) Write short notes on 
                                           i)   Permanent magnet
                                           ii)  Pointer
                                           iii) Scale
 
17. a) Explain with neat sketch the working of  i) Attraction type ii) repulsion type
instruments .
                              (or)
        b) Draw the block diagram of CRO and explain the various sections
 
18. a) Explain the working of induction type’s wattmeter
                             (or)
       b) With a net sketch explain the operation of 3 phase Energy meter
 
19. a) How are frequency meter classified? Explain the working of a mechanical
resonance type meter.
                           (or)
 
       b) With a neat sketch, explain the working of Weston Synchroscope.
 
20. a) Explain the working principle of Piezo-electric transducer for pressure
measurement.
                          (or)
b) Explain with a neat diagram how a pipe shells thickness is measured using Ultrasonic Waves.