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