Q. The term ‘rahat’ refers to which of the following?
Answer: An irrigation apparatus
Notes: Agriculture and irrigations were the two areas which underwent deep technological changes after the advent of Turkish rule. Earlier Arghatta/Arahatta consisted of one wheel with pots of clay attached around the rim of the wheel. It was used to extract water from the shallow waters or open surfaces, but not over wells. It underwent a technological upgrade in which the earthen pots fitted around the rim of the wheel were replaced by a chain of pots which was long enough to reach the water level of the well. The chain was made of double ropes with open ends between which the pots were secured with timber strips. This was the Ghatiyantra (pot-machine). But, the use of terms Arghatta and Arahatta (modern rahat) continued.