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