1. Absolute instruments are used in
(A) Factories
(B) Standard laboratories
(C) Automobiles
(D) Universities
2. Which one of the following instruments is an absolute instrument
(A) Digital volt meter
(B) Analogue ampere meter
(C) Ballistic Galvanometer
(D) Tangent Galvanometer
3. In this instrument, the measured value of current is found by calculation using formula.
(A) Digital instrument
(B) Reed type frequency meter
(C) Secondary instrument
(D) Absolute instrument
4. This instrument doesn’t show the measured quantity directly.
(A) Volt meter
(B) Ampere meter
(C) Tangent Galvanometer
(D) Watt meter
5. 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
6. To find the value of H (horizontal component of earth’s magnetic field), this instrument is used.
(A) Tangent Galvanometer
(B) Half wave rectifier instrument
(C) Full wave rectifier instrument
(D) All secondary instruments
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) Analogue instruments
(C) Absolute instruments
(D) Secondary 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) Tangent Galvanometer
(C) Fixed focus pyrometer
(D) Induction type energy meter
11. Raleigh current balance is
(A) Substandard instrument
(B) An absolute instrument
(C) Calibrated instrument
(D) None of these
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) Checked by using once
(B) Calibrated with absolute or pre-calibrated instrument
(C) Used exact horizontally
(D) None of these
14. This is not an example of secondary instrument.
(A) Volt meter
(B) Frequency meter
(C) Watt meter
(D) Tangent Galvanometer
15. These instruments show the measured quantity by pointer and scale.
(A) Integrating instruments
(B) Recording instruments
(C) Displaying instruments
(D) Indicating instruments
16. Accuracy of secondary instrument on full scale deflection may be.
(A) Any of these
(B) 0.5 %
(C) 2.5 %
(D) 0.1 %
17. In recording instruments, the No of independent moving systems used are.
(A) 01
(B) 03
(C) 02
(D) Both a & b
18. Recording surface and pen is used in these instruments.
(A) Integrating instruments
(B) All secondary instruments
(C) Recording instruments
(D) None of these
19. No observer is needed for these instruments during use.
(A) Indicating instruments
(B) Recording 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) Recording instruments
(B) Absolute 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) Both a & b
(C) Energy meters
(D) Recording instruments
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) Digital multi-meter
(B) Analogue volt meter
(C) Oscilloscope
(D) Both a & b
25. 80 to 90 % instruments use this effect of current.
(A) Heating
(B) Electrostatic
(C) Chemical
(D) Magnetic
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) Electrostatic
(B) Chemical
(C) Magnetic
(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) Heat
(B) Voltage
(C) Current
(D) Power
30. 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