Engineering Thermodynamics According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as Temperature None of these Absolute temperature, if volume is kept constant Volume, if temperature is kept constant Temperature None of these Absolute temperature, if volume is kept constant Volume, if temperature is kept constant ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The change of entropy, when heat is absorbed by the gas, is Positive Positive or negative Negative None of these Positive Positive or negative Negative None of these ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be 30 Nm 300 Nm 300,000 Nm 3000 Nm 30 Nm 300 Nm 300,000 Nm 3000 Nm ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics In order that a cycle be reversible, following must be satisfied All of these When heat is being absorbed, temperature of hot source and working substance should be same Free expansion or friction resisted expansion/compression process should not be encountered When beat is being rejected, temperature of cold source and working substance should be same All of these When heat is being absorbed, temperature of hot source and working substance should be same Free expansion or friction resisted expansion/compression process should not be encountered When beat is being rejected, temperature of cold source and working substance should be same ANSWER DOWNLOAD EXAMIANS APP
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) (v1 + v2)/v2 v2/v1 v1/v2 (v1 + v2)/v1 (v1 + v2)/v2 v2/v1 v1/v2 (v1 + v2)/v1 ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The condition of perfect vacuum, i.e., absolute zero pressure can be attained at A temperature of 273 °K A temperature of 0°C A temperature of - 273.16°C A negative pressure and 0°C temperature A temperature of 273 °K A temperature of 0°C A temperature of - 273.16°C A negative pressure and 0°C temperature ANSWER DOWNLOAD EXAMIANS APP
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