Engineering Thermodynamics The fuel mostly used in blast furnace for extracting pig iron from iron ores is Pulverized coal Hard coke Bituminous coal Soft coke Pulverized coal Hard coke Bituminous coal Soft coke ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The condition for the reversibility of a cycle is The working parts of the engine must be friction free All of these The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process All the processes, taking place in the cycle of operation, must be extremely slow The working parts of the engine must be friction free All of these The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process All the processes, taking place in the cycle of operation, must be extremely slow ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The absolute zero pressure can be attained at a temperature of 0°C -273°C None of these 273 K 0°C -273°C None of these 273 K ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to 1000 K 1200 K 800 K 1400 K 1000 K 1200 K 800 K 1400 K ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle) (T1/T2) - 1 1 - (T1/T2) 1 + (T2/T1) 1 - (T2/T1) (T1/T2) - 1 1 - (T1/T2) 1 + (T2/T1) 1 - (T2/T1) ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The entropy __________ in an irreversible cyclic process. Increases Remains constant None of these Decreases Increases Remains constant None of these Decreases ANSWER DOWNLOAD EXAMIANS APP
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