1. Absolute instruments are used in
(A) Factories
(B) Universities
(C) Automobiles
(D) Standard laboratories
2. Which one of the following instruments is an absolute instrument
(A) Tangent Galvanometer
(B) Digital volt meter
(C) Ballistic Galvanometer
(D) Analogue ampere meter
3. In this instrument, the measured value of current is found by calculation using formula.
(A) Reed type frequency meter
(B) Absolute instrument
(C) Secondary instrument
(D) Digital instrument
4. This instrument doesn’t show the measured quantity directly.
(A) Volt meter
(B) Ampere meter
(C) Watt meter
(D) Tangent Galvanometer
5. To find the value of measured quantity in these instruments, it is necessary to know the instrument constants.
(A) Tachometer
(B) Lux meter
(C) Mac bath Light meter
(D) Absolute instruments
6. To find the value of H (horizontal component of earth’s magnetic field), this instrument is used.
(A) Half wave rectifier instrument
(B) All secondary instruments
(C) Full wave rectifier instrument
(D) Tangent Galvanometer
7. To find the value of current with this instrument, H of a particular place must be known.
(A) Analogue ampere meter
(B) Digital ampere meter
(C) Tangent Galvanometer
(D) Electrostatic volt meter
8. Reading of these instruments is considered 100% correct.
(A) Digital instruments
(B) Secondary instruments
(C) Analogue instruments
(D) Absolute instruments
9. Reading of these instruments doesn’t need comparison or reference.
(A) Both absolute and Secondary instruments
(B) Secondary instruments
(C) Absolute instruments
(D) None of these
10. It should be adjusted horizontally and to the magnetic meridian before use.
(A) Variable focus pyrometer
(B) Fixed focus pyrometer
(C) Tangent Galvanometer
(D) Induction type energy meter
11. Raleigh current balance is
(A) None of these
(B) Substandard instrument
(C) Calibrated instrument
(D) An absolute instrument
12. Secondary instruments are used
(A) For reference or comparison
(B) For Current measurement only
(C) In standard laboratories
(D) In factories and educational institutions
13. Reading of secondary instruments not reliable until these instruments have been.
(A) Calibrated with absolute or pre-calibrated instrument
(B) Checked by using once
(C) Used exact horizontally
(D) None of these
14. This is not an example of secondary instrument.
(A) Volt meter
(B) Tangent Galvanometer
(C) Frequency meter
(D) Watt meter
15. These instruments show the measured quantity by pointer and scale.
(A) Recording instruments
(B) Indicating instruments
(C) Displaying instruments
(D) Integrating instruments
16. Accuracy of secondary instrument on full scale deflection may be.
(A) 0.1 %
(B) 0.5 %
(C) 2.5 %
(D) Any of these
17. In recording instruments, the No of independent moving systems used are.
(A) 01
(B) 02
(C) 03
(D) Both a & b
18. Recording surface and pen is used in these instruments.
(A) Recording instruments
(B) All secondary instruments
(C) Integrating instruments
(D) None of these
19. No observer is needed for these instruments during use.
(A) Recording instruments
(B) Indicating instruments
(C) Digital instruments
(D) None of these
20. These instruments are used to find the value and nature of fault in power system.
(A) Absolute instruments
(B) Recording instruments
(C) Fault indicators
(D) Secondary instruments
21. Extra running expenditures have to be bear during the use of these instruments.
(A) Digital instruments
(B) Recording instruments
(C) Energy meters
(D) Both a & b
22. Reading of absolute instruments is accurate up to.
(A) 50 %
(B) 90 %
(C) 90–95 %
(D) 100 %
23. This is an example of Analogue instrument.
(A) Multi-meter having pointer and scale
(B) Electromechanical energy meter
(C) Reed type frequency meter
(D) All these
24. No moving part is used in this instrument.
(A) Analogue volt meter
(B) Oscilloscope
(C) Digital multi-meter
(D) Both a & b
25. 80 to 90 % instruments use this effect of current.
(A) Magnetic
(B) Electrostatic
(C) Chemical
(D) Heating
26. This effect of current is used in DC ampere hour meter.
(A) Thermal/heating
(B) Chemical
(C) Magnetic
(D) Electrostatic
27. In electrostatic volt meter, this effect of current is utilized.
(A) Chemical
(B) Magnetic
(C) Electrostatic
(D) Thermal/heating
28. This effect of current is used in induction type energy meters.
(A) Electrostatic
(B) Chemical
(C) Electromagnetic induction
(D) None of these
29. In all voltmeters (except electrostatic voltmeter), this is used to produce the deflecting torque.
(A) Voltage
(B) Current
(C) Heat
(D) Power
30. To find the value of measured quantity in these instruments, it is necessary to know the instrument constants.
(A) Absolute instruments
(B) Lux meter
(C) Mac bath Light meter
(D) Tachometer