Engineering Thermodynamics The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion) v2/v1 v1/v2 (v1 + v2)/v2 (v1 + v2)/v1 v2/v1 v1/v2 (v1 + v2)/v2 (v1 + v2)/v1 ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits? O₂, N₂, water vapour O₂, N₂, steam, CO₂ O₂, N₂, H₂, air SO₂, NH₃, CO₂, moisture O₂, N₂, water vapour O₂, N₂, steam, CO₂ O₂, N₂, H₂, air SO₂, NH₃, CO₂, moisture ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will Increase/decrease depending on application Decrease Remain unchanged Increase Increase/decrease depending on application Decrease Remain unchanged Increase ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics In closed cycle gas turbine, the air is compressed Isentropically None of these Isothermally Polytropically Isentropically None of these Isothermally Polytropically ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics Carnot cycle efficiency is maximum when Difference between initial and final temperature is 0°K Final temperature is 0°K Initial temperature is 0°K Final temperature is 0°C Difference between initial and final temperature is 0°K Final temperature is 0°K Initial temperature is 0°K Final temperature is 0°C ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats) 1 - (1/ rγ - 1) 1 + (1/ rγ - 1) 1 + rγ - 1 1 - rγ - 1 1 - (1/ rγ - 1) 1 + (1/ rγ - 1) 1 + rγ - 1 1 - rγ - 1 ANSWER DOWNLOAD EXAMIANS APP