Materials related questions.
Results
#1. The best known conductor of electricity is….?
incorrect
#2. Melting point of silver is….?
incorrect
#3. Brass is an alloy of…..?
incorrect
#4. Bronze is an alloy of….?
#5. ACSR Stands for….?
#6. Super conductor shows the resistance of….?
#7. Melting point of aluminium is….?
#8. Semiconductor shows the co-efficient of resistance is….?
incorrect
resistance decreases with increase in temperature showing exponentially.
#9. Material used for making cable shields is….?
incorrect
#10. Variable resistors are made by….?
incorrect
#11. High resistivity material is….?
#12. Material showing lowest resistivity is….?
#13. When trivalent impurity is added to intrinsic semiconductor to form…..?
#14. Example of trivalent impurity is….?
#15. Thermistors shows…..?
#16. The heating element of irons are made of….?
#17. Example of semiconductor is….?
#18. The most malleable, ductile low resistivity material is….?
#19. Which is not a semiconductor?
#20. A pure semiconductor at ordinary conditions, behaves as….?
#21. AAAC stand for….?
#22. Melting point of manganin is…..?
#23. Constantan(eureka) is an alloy of….?
incorrect
high resistive material
#24. Filament of incandescent lamps are made up of….?
incorrect
tungsten also called wolfram
#25. Which metal shows liquid form at room temperature?
incorrect
mercury in silver white colour
#26. The properties of fuse element is….?
#27. Fuse element made of….?
#28. Minimum current at which fuse element is melt is calles?
#29. Ratio of fusing current to the current rating of fuse element is called?
#30. The maximum value of the fault current actually reached before the fuse melts is called….?
#31. Fusing factor is always …..?
#32. The colour bands of a resistor are read as brown, black, orange, silver. then the value of the resistor is….?
#33. The most commonly used electrical conductor is….?
#34. An electrical joint should provide at….?
#35. Solder is a mixture of….?
#36. Fusing factor of HRC fuse is….?
#37. Fusing factor of LRC fuse is…?
#38. Minimum voltage which when applied to an insulating material will result in the destruction of its insulating properties called…..?
#39. When temperature increases the dielectric strength of insulator is….?
#40. Humidity ……the dielectric strength of insulator ?
#41. Factors agfecting dielectric losses are….?
#42. Class …… insulation has their operating temperature 155°C?
#43. Reluctivity analogous to….?
#44. Reluctance is analogous to….?
#45. Class ……insulation has their operating temperature is 180°C?
#46. When supply frequency increases, dielectric strength of an insulator is….?
#47. Chloroprene rubber is also called….?
#48. Chloroprene rubber is also called….?
#49. Alloy of nickel and iron called?
#50. Alloy of nickel and iron called?
#51. Resistivity of silver is ….?
#52. Example of pentavalent impirity is….?
#53. When forward biasing applied across PN junction increase the width of depletion layer will…..?
#54. Cut in voltage of silicon is…?
ge=0.3
#55. Cut in voltage of silicon is…?
ge=0.3
#56. The process by which the light energy is obtained by applying electrical energy called….?
#57. The loss appearing in the form of heat due to reversal of electric stresses compelling molecular rearrangement is known as…..?
#58. While soldering ICs maximum temperature should not exceed….?
#59. Application of paper in indulating material is restricted to temperatures upto….?
#60. Dielectric constant of vaccum is….?
#61. Dielectric loss is propotional to…?
#62. Dielectric loss is propotional to…?
#63. The dielectric strength of air under normal conditions in KV/cm is about….?
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