Tata is a household name in a way few companies are.From the salt on the dining table to the car in the driveway, from the tea in the morning to the software running behind some of the world's biggest businesses, the Tata name has become part of everyday life. It has built steel plants and power stations, iconic hotels and an airline. It owns Jaguar Land Rover, makes jewellery and watches, and is now spending billions of rupees to build semiconductors. (Credits: Reuters) advertisementRead Full StoryBut some difficult questions are now gathering behind that familiar name.Air India, brought back into…