IOCL Junior Operator Electrical MCQ || IOCL Junior Operator General Science Questions and Answers61. What type of solder is recommended for use with Zinc chloride (acidic) flux?1 . Electrician’s solder 2 . Tinman’s solder and Fine solder 3 . Electrician’s fine solder 4 . Coarse solder Answer and SolutionAnswer: "Tinman’s solder and Fine solder "Tinman’s solder” and “Fine solder” listed under the “Type of solder” column for Zinc chloride (acidic) flux. Discuss62. Which flux is used for soldering zinc and galvanized iron?1 . Rosin 2 . Hydrochloric acid 10% diluted with water 90% 3 . Sal ammonia rosin 4 . Tallow Answer and SolutionAnswer: "Hydrochloric acid 10% diluted with water 90% "Diluted hydrochloric acid is suitable flux for “Zinc” and “Galvanised iron.” Discuss63. What type of solder is recommended for use with Sal ammonia rosin flux?1 . Electrician’s solder 2 . Electrician’s fine solder 3 . Tinman’s solder 4 . Coarse solder Answer and SolutionAnswer: "Coarse solder "“Coarse solder” is recommended solder type for Sal ammonia rosin flux. Discuss64. What metals are suitable for soldering with Sal ammonia rosin flux?1 . Zinc and galvanized iron 2 . Copper, brass, tin plate, gun-metal 3 . Cast iron and mild steel 4 . Electrical conductors only Answer and SolutionAnswer: "Copper, brass, tin plate, gun-metal "Copper, brass, tin plate, gun-metal are suitable for soldering with Sal ammonia rosin flux. Discuss65. Which flux is specifically used for joining electrical conductors?1 . Rosin 2 . Zinc chloride (acidic) 3 . Hydrochloric acid 10% diluted with water 90% 4 . Sal ammonia rosin Answer and SolutionAnswer: "Rosin "Rosin” is used for “Joining electrical conductors.” Discuss66. Which flux is described as "acid free"?1 . Zinc chloride (acidic) 2 . Hydrochloric acid 10% diluted with water 90% 3 . Sal ammonia rosin 4 . Tallow Answer and SolutionAnswer: "Tallow " Tallow or turpentine flux is acid free flux. This means it does not contain acids, which are typically used in other types of fluxes to remove oxides and impurities from metal surfaces. Acid-free fluxes like tallow or turpentine are less corrosive and might be used in situations where acids could damage materials or cause unwanted reactions. Discuss67. What is Tallow flux used for?1 . Soldering zinc 2 . Soldering cast iron 3 . Joining electrical conductors and general soldering 4 . Soldering brass only Answer and SolutionAnswer: "Joining electrical conductors and general soldering "Tallow flux used for Joining electrical conductors and general soldering. Discuss1234567
