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