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. Which electrical effect does a single-phase energy meter work on? Heating effect Electrostatic effect Induction effect Chemical effectQuestion 2 of 37Question 3 of 37 3. Which is an absolute instrument? Energy meter Voltmeter Ammeter Tangent galvanometerQuestion 3 of 37Question 4 of 37 4. What is the purpose of the 3rd terminal in advanced megohm meters? Pass excess voltage to ground Get higher ohmic values Pass excess current to ground Get accurate readings without oscillationQuestion 4 of 37Question 5 of 37 5. What type of instrument is this? Permanent magnet moving coil Dynamometer type moving coil Repulsion type moving iron Attraction type moving ironQuestion 5 of 37Question 6 of 37 6. Why do moving iron instruments have non-uniform scales? Deflecting force ∝ 1/current Deflecting force ∝ current Deflection ∝ current² Deflection ∝ 1/current²Question 6 of 37Question 7 of 37 7. Why do moving coil meters have uniform scales? Deflecting torque ∝ current² Deflecting torque ∝ current Deflecting torque ∝ 1/current Deflecting torque ∝ 1/current²Question 7 of 37Question 8 of 37 8. Which instrument accurately measures resistances of 1 ohm and below? Analog multimeter Series type ohm meter Shunt type ohm meter Megohm meterQuestion 8 of 37Question 9 of 37 9. How to achieve maximum accuracy in analog instrument measurements? Keep high input impedance Keep low input impedance Provide correct damping system Use short connecting leadsQuestion 9 of 37Question 10 of 37 10. Why is damping force required in moving coil instruments? Returns needle to zero position Stops needle without oscillations Helps deflecting force act fast Makes needle movement fasterQuestion 10 of 37Question 11 of 37 11. Which type of energy meter works with neutral connection? Three phase two element Single phase single element Three phase three element Three phase two element with CT & PTQuestion 11 of 37Question 12 of 37 12. Calculate the shunt resistance needed to measure 10mA with a 1mA meter: 300Ω 0.3Ω 30Ω 3ΩQuestion 12 of 37Question 13 of 37 13. In which position should instruments with gravity control be used? Any position Horizontal position Vertical position Inclined positionQuestion 13 of 37Question 14 of 37 14. What material is used for shunt resistances? Nichrome Eureka Manganin CopperQuestion 14 of 37Question 15 of 37 15. What type of instrument is this? Indicating instrument Recording instrument Absolute instrument Integrating instrumentQuestion 15 of 37Question 16 of 37 16. Which measuring error is caused by magnetic field effects? Switching error Human error Influence error Device errorQuestion 16 of 37Question 17 of 37 17. Which instruments typically use air friction damping? Induction type instruments Moving coil instruments Moving iron instruments Dynamometer type instrumentsQuestion 17 of 37Question 18 of 37 18. What type of frequency meter is this? Ratio meter type Weston type Mechanical resonance type Electro dynamic typeQuestion 18 of 37Question 19 of 37 19. What is the function of an integrating instrument? Displays the quantity Registers the quantity Measures the quantity Indicates the quantityQuestion 19 of 37Question 20 of 37 20. What type of scale is this? Coarse scale Non-linear scale Extended scale Linear scaleQuestion 20 of 37Question 21 of 37 21. What is the function of soft iron core in moving coil instruments? Controls needle movement Strengthens deflection force Ensures uniform magnetic flux distribution Provides maximum sensitivityQuestion 21 of 37Question 22 of 37 22. What is the unit of instrument sensitivity? Ohm metre Ohm/metre Ohm/volt Volt/ohmQuestion 22 of 37Question 23 of 37 23. Why are two straight holes provided in an energy meter's aluminum disc? Power factor correction Arrest creeping error Reduce disc weight Prevent flux leakageQuestion 23 of 37Question 24 of 37 24. What type of meter is this? AC and DC multirange ammeter AC multirange ammeter AC and DC multirange voltmeter DC multirange voltmeterQuestion 24 of 37Question 25 of 37 25. Which material is used to make control springs in measuring instruments? Silver Tinned copper Phosphor bronze SteelQuestion 25 of 37Question 26 of 37 26. What type of wattmeter is this? Three element 4-wire wattmeter Three phase two element with CT & PT Three element 3-phase wattmeter Two element 3-phase wattmeterQuestion 26 of 37Question 27 of 37 27. Which instrument is an example of an integrating instrument? Energy meter Tangent galvanometer DC voltmeter AC voltmeterQuestion 27 of 37Question 28 of 37 28. Which quantity is measured by an electrodynamometer type instrument? Voltage Power Current ResistanceQuestion 28 of 37Question 29 of 37 29. Which error occurs due to incorrect instrument positioning during reading? Influence error Switching error Device error Human errorQuestion 29 of 37Question 30 of 37 30. Which meter measures motor revolutions per minute? Tachometer Energy meter Ampere hour meter Center zero ammeterQuestion 30 of 37Question 31 of 37 31. What is the purpose of the variable resistor connected across a shunt-type ohmmeter? Adjust current to safe value Avoid draining of battery Adjust pointer to zero position Minimize error in readingQuestion 31 of 37Question 32 of 37 32. Which force is required to move the pointer from zero position in an indicating instrument? Air friction damping Eddy current damping Deflecting force Controlling forceQuestion 32 of 37Question 33 of 37 33. How is creeping error controlled in energy meters? Adjusting brake magnet position Increasing inductive load Reducing rated voltage Drilling two diametrically opposite holes on discQuestion 33 of 37Question 34 of 37 34. How to identify a moving iron type instrument? One terminal colored red Terminals marked (+) and (-) Only (+) terminal marked No terminal markingQuestion 34 of 37Question 35 of 37 35. What happens if a CT's secondary is kept open? Secondary winding burns VA capacity reduces VA capacity increases Primary winding burnsQuestion 35 of 37Question 36 of 37 36. What error occurs when an energy meter disc rotates continuously without load? Friction error Creeping error Phase error Speed errorQuestion 36 of 37Question 37 of 37 37. In which position should spring-controlled instruments be used? Vertical position only Any position Horizontal position only Inclined position onlyQuestion 37 of 37 Loading...