Chapter 2 Constructional features of measuring instruments MCQs

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1. Absolute instruments are used in





2. Which one of the following instruments is an absolute instrument





3. In this instrument, the measured value of current is found by calculation using formula.





4. This instrument doesn’t show the measured quantity directly.





5. To find the value of measured quantity in these instruments, it is necessary to know the instrument constants.





6. To find the value of H (horizontal component of earth’s magnetic field), this instrument is used.





7. To find the value of current with this instrument, H of a particular place must be known.





8. Reading of these instruments is considered 100% correct.





9. Reading of these instruments doesn’t need comparison or reference.





10. It should be adjusted horizontally and to the magnetic meridian before use.





11. Raleigh current balance is





12. Secondary instruments are used





13. Reading of secondary instruments not reliable until these instruments have been.





14. This is not an example of secondary instrument.





15. These instruments show the measured quantity by pointer and scale.





16. Accuracy of secondary instrument on full scale deflection may be.





17. In recording instruments, the No of independent moving systems used are.





18. Recording surface and pen is used in these instruments.





19. No observer is needed for these instruments during use.





20. These instruments are used to find the value and nature of fault in power system.





21. Extra running expenditures have to be bear during the use of these instruments.





22. Reading of absolute instruments is accurate up to.





23. This is an example of Analogue instrument.





24. No moving part is used in this instrument.





25. 80 to 90 % instruments use this effect of current.





26. This effect of current is used in DC ampere hour meter.





27. In electrostatic volt meter, this effect of current is utilized.





28. This effect of current is used in induction type energy meters.





29. In all voltmeters (except electrostatic voltmeter), this is used to produce the deflecting torque.





30. To find the value of measured quantity in these instruments, it is necessary to know the instrument constants.





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