ELECTRICIAN 1st YEAR MODULE – Illumination July 2, 2025June 30, 2025 by admin TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<12345678910111213141516171819202122>> 0% Question 1 of 22 1. What type of lamp is this? MAT type MV lamp MA type HPMV lamp HP metal halide lamp MB type HPMV lampQuestion 1 of 22Question 2 of 22 2. Which term refers to light flow on a plane surface? Luminous intensity Lumen Illuminance Luminous fluxQuestion 2 of 22Question 3 of 22 3. Which device provides ignition voltage and acts as choke in HPSV lamps? Sodium vapor Leak transformer High pressure aluminum oxide Arc tubeQuestion 3 of 22Question 4 of 22 4. What is this type of light called? Spotlight Flood light Flash light Bulk lightQuestion 4 of 22Question 5 of 22 5. How is evaporation rate reduced in vacuum bulbs? Filling with inert gas Producing arc in bulb Increasing filament resistance Reducing filament resistanceQuestion 5 of 22Question 6 of 22 6. What is the main advantage of coiled coil lamps? Higher light output High melting point Low operating voltage Low power consumptionQuestion 6 of 22Question 7 of 22 7. In which position are MB type high pressure mercury vapour lamps operated? Inclined Any position Vertical HorizontalQuestion 7 of 22Question 8 of 22 8. How is stroboscopic effect reduced in industrial twin tube light fittings? Two capacitors in series (one per tube) Capacitor in series with one tube Capacitor in series with supply Capacitor parallel to supplyQuestion 8 of 22Question 9 of 22 9. What term refers to luminous flux per unit solid angle from a light source? Candela Lumen Illuminance Luminous intensityQuestion 9 of 22Question 10 of 22 10. What is the working temperature of filament lamp? 2300°C 2000°C 1800°C 1500°CQuestion 10 of 22Question 11 of 22 11. Which material is coated on tungsten electrode in fluorescent tube lamps? Barium and strontium oxide Silver oxide Phosphor powder Fluorescent powderQuestion 11 of 22Question 12 of 22 12. What type of reflector is this? Mirror type Parabolic type Soft light type Dispersive typeQuestion 12 of 22Question 13 of 22 13. What is the current capacity of flasher if current is 100mA per row? 300 mA 200 mA 50 mA 100 mAQuestion 13 of 22Question 14 of 22 14. What is the function of leak transformer in high pressure sodium vapour lamp circuit? Provide initial high voltage ignition Reduce starting current Increase working voltage Reduce working voltageQuestion 14 of 22Question 15 of 22 15. Why is the outer tube of high pressure metal halide lamp made of borosilicate glass? Reduce UV radiation Withstand high temperature Withstand atmospheric pressure Increase lighting effectQuestion 15 of 22Question 16 of 22 16. What is the S.I unit of luminous intensity? Candela Steradian Lux LumenQuestion 16 of 22Question 17 of 22 17. What is the purpose of ignitor in high pressure sodium vapour lamps? Increase running voltage Generate high voltage starting pulse Decrease running current Decrease starting currentQuestion 17 of 22Question 18 of 22 18. What is the unit of luminous flux? Lumen Lux Lumen/m² CandelaQuestion 18 of 22Question 19 of 22 19. Which lighting system is used for flood and industrial lighting? Semi-direct lighting Semi-indirect lighting Direct lighting Indirect lightingQuestion 19 of 22Question 20 of 22 20. Which is a cold cathode lamp? Halogen lamp Fluorescent lamp Neon sign lamp Mercury vapor lampQuestion 20 of 22Question 21 of 22 21. Which lighting design type is glare-free? Direct Semi-indirect Semi-direct IndirectQuestion 21 of 22Question 22 of 22 22. What is the unit of luminous efficiency? Lumen/watt Lumen/m² Lux LumenQuestion 22 of 22 Loading...