ELECTRICIAN 1st YEAR MODULE – Measuring Instruments July 2, 2025June 30, 2025 by admin TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<12345678910111213141516171819202122232425262728293031323334353637>> 0% Question 1 of 37 1. Which parameter causes loading effect in measuring instruments? High sensitivity Low sensitivity Low influence error Low accuracyQuestion 1 of 37Question 2 of 37 2. In which position should instruments with gravity control be used? Any position Vertical position Inclined position Horizontal positionQuestion 2 of 37Question 3 of 37 3. Which instruments typically use air friction damping? Moving coil instruments Dynamometer type instruments Moving iron instruments Induction type instrumentsQuestion 3 of 37Question 4 of 37 4. Which quantity is measured by an electrodynamometer type instrument? Voltage Current Resistance PowerQuestion 4 of 37Question 5 of 37 5. Why are two straight holes provided in an energy meter's aluminum disc? Reduce disc weight Prevent flux leakage Arrest creeping error Power factor correctionQuestion 5 of 37Question 6 of 37 6. Why do moving coil meters have uniform scales? Deflecting torque ∝ 1/current² Deflecting torque ∝ current Deflecting torque ∝ current² Deflecting torque ∝ 1/currentQuestion 6 of 37Question 7 of 37 7. Which material is used to make control springs in measuring instruments? Silver Phosphor bronze Tinned copper SteelQuestion 7 of 37Question 8 of 37 8. Calculate the shunt resistance needed to measure 10mA with a 1mA meter: 0.3Ω 300Ω 3Ω 30ΩQuestion 8 of 37Question 9 of 37 9. What type of meter is this? AC multirange ammeter AC and DC multirange ammeter DC multirange voltmeter AC and DC multirange voltmeterQuestion 9 of 37Question 10 of 37 10. Which is an absolute instrument? Energy meter Ammeter Tangent galvanometer VoltmeterQuestion 10 of 37Question 11 of 37 11. Which instrument is an example of an integrating instrument? AC voltmeter Energy meter Tangent galvanometer DC voltmeterQuestion 11 of 37Question 12 of 37 12. What type of wattmeter is this? Three element 3-phase wattmeter Three element 4-wire wattmeter Three phase two element with CT & PT Two element 3-phase wattmeterQuestion 12 of 37Question 13 of 37 13. What type of scale is this? Linear scale Non-linear scale Coarse scale Extended scaleQuestion 13 of 37Question 14 of 37 14. What is the unit of instrument sensitivity? Ohm/volt Ohm metre Volt/ohm Ohm/metreQuestion 14 of 37Question 15 of 37 15. Which type of energy meter works with neutral connection? Three phase two element with CT & PT Three phase two element Single phase single element Three phase three elementQuestion 15 of 37Question 16 of 37 16. Which measuring error is caused by magnetic field effects? Switching error Device error Human error Influence errorQuestion 16 of 37Question 17 of 37 17. Which meter measures motor revolutions per minute? Tachometer Center zero ammeter Energy meter Ampere hour meterQuestion 17 of 37Question 18 of 37 18. What is the function of an integrating instrument? Measures the quantity Registers the quantity Indicates the quantity Displays the quantityQuestion 18 of 37Question 19 of 37 19. How to identify a moving iron type instrument? No terminal marking Terminals marked (+) and (-) One terminal colored red Only (+) terminal markedQuestion 19 of 37Question 20 of 37 20. What error occurs when an energy meter disc rotates continuously without load? Creeping error Speed error Phase error Friction errorQuestion 20 of 37Question 21 of 37 21. What is the purpose of the variable resistor connected across a shunt-type ohmmeter? Adjust current to safe value Adjust pointer to zero position Minimize error in reading Avoid draining of batteryQuestion 21 of 37Question 22 of 37 22. How to achieve maximum accuracy in analog instrument measurements? Keep high input impedance Provide correct damping system Keep low input impedance Use short connecting leadsQuestion 22 of 37Question 23 of 37 23. What type of instrument is this? Integrating instrument Recording instrument Absolute instrument Indicating instrumentQuestion 23 of 37Question 24 of 37 24. What type of instrument is this? Dynamometer type moving coil Permanent magnet moving coil Repulsion type moving iron Attraction type moving ironQuestion 24 of 37Question 25 of 37 25. What happens if a CT's secondary is kept open? Primary winding burns VA capacity reduces Secondary winding burns VA capacity increasesQuestion 25 of 37Question 26 of 37 26. How is creeping error controlled in energy meters? Drilling two diametrically opposite holes on disc Reducing rated voltage Adjusting brake magnet position Increasing inductive loadQuestion 26 of 37Question 27 of 37 27. Why do moving iron instruments have non-uniform scales? Deflection ∝ current² Deflection ∝ 1/current² Deflecting force ∝ current Deflecting force ∝ 1/currentQuestion 27 of 37Question 28 of 37 28. What material is used for shunt resistances? Manganin Eureka Nichrome CopperQuestion 28 of 37Question 29 of 37 29. What is the function of soft iron core in moving coil instruments? Strengthens deflection force Controls needle movement Provides maximum sensitivity Ensures uniform magnetic flux distributionQuestion 29 of 37Question 30 of 37 30. Which error occurs due to incorrect instrument positioning during reading? Influence error Human error Switching error Device errorQuestion 30 of 37Question 31 of 37 31. Which instrument accurately measures resistances of 1 ohm and below? Megohm meter Analog multimeter Series type ohm meter Shunt type ohm meterQuestion 31 of 37Question 32 of 37 32. What is the purpose of the 3rd terminal in advanced megohm meters? Get accurate readings without oscillation Pass excess current to ground Get higher ohmic values Pass excess voltage to groundQuestion 32 of 37Question 33 of 37 33. Which electrical effect does a single-phase energy meter work on? Chemical effect Electrostatic effect Induction effect Heating effectQuestion 33 of 37Question 34 of 37 34. Which force is required to move the pointer from zero position in an indicating instrument? Controlling force Eddy current damping Deflecting force Air friction dampingQuestion 34 of 37Question 35 of 37 35. What type of frequency meter is this? Weston type Ratio meter type Electro dynamic type Mechanical resonance typeQuestion 35 of 37Question 36 of 37 36. Why is damping force required in moving coil instruments? Helps deflecting force act fast Makes needle movement faster Returns needle to zero position Stops needle without oscillationsQuestion 36 of 37Question 37 of 37 37. In which position should spring-controlled instruments be used? Inclined position only Any position Horizontal position only Vertical position onlyQuestion 37 of 37 Loading...