MCQ PracticeAdvantages of use of preheated combustion air areSubject: Chemical EngineeringTopic: Furnace TechnologyASaving in fuel consumptionBReduction in scale lossesCIncrease in flame temperatureDAll of the aboveCorrect Answer: DPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the