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Measurement and Instrumentation MCQ Set 1

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1. The spring material used in a spring control device should have the following property.




2. For handling greater currents induction watt-meters are used in conjunction with




3. The chemical effect of current is used in




4. The multiplier and the meter coil in a voltmeter are in




5. The pressure coil of a wattmeter should be connected on the supply side of the current coil when




6. When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is




7. Which of the following devices should be used for accurate measurement of low D.C. voltage?




8. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken




9. Wagner earthing device is used to eliminate errors due to




10. The two pressure coils of a single phase power factor meter have




11. In a Weston synchronoscope, the fixed coils are connected across




12. In a Weston frequency meter, the magnetic axes of the two fixed coils are




13. If an instrument has cramped scale for larger values, then it follows




14. Alternating current is measured by




15. The power of a n-phase circuit can be measured by using a minimum of




16. To measure radio frequency, the suitable frequency meter is




17. Induction type single phase energy meters measure electric energy in




18. In majority of instruments damping is provided by




19. A moving iron instrument can be used for




20. In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was




21. It is required to measure the true open circuit e.m.f. of a battery. The best device is




22. In order to achieve high accuracy, the slide wire of a potentiometer should be




23. In order to achieve high accuracy, the slide wire of a potentiometer should be




24. For measurement of mutual inductance we can use




25. A power factor meter has




26. In Weston synchronoscope the moving coil is connected across




27. Operating torques in analogue instruments are




28. A sensitive galvanometer produces large deflection for a




29. In an energy meter braking torque is produced to




30. The principle on which vector voltmeter is based is




31. Commonly used instruments in power system measurement are




32. The power factor of a single phase load can be calculated if the instruments available are




33. In a single phase power factor meter the phase difference between the currents in the two pressure coils is




34. For measurements on high voltage capacitors, the suitable bridge is




35. The operating voltage of a Meggar is about (A) 6 V (B) 12 V (C) 40 V (D)




36. An ohmmeter is a




37. A dynamometer wattmeter can be used for




38. The disc of an instrument using eddy current damping should be of




39. The use of ________ instruments is merely confined within laboratories as standardizing instruments.




40. An instrument transformer is used to extend the range of




41. The gravity controlled instrument has crowded scale because current is proportional to




42. Systematic errors are




43. In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at




44. A universal RLC bridge uses




45. A voltage of about 200 V can be measured




46. In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be




47. The scale of a rectifier instrument is




48. The household energy meter is




49. Most common form of A.C. meters met with in every day domestic and industrial installations are




50. Resistances can be measured with the help of