The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as External energy Entropy Internal energy Enthalpy TRUE ANSWER : ? YOUR ANSWER : ?
An adiabatic wall is one which Prevents thermal interaction Discourages thermal interaction Encourages thermal interaction Permits thermal interaction TRUE ANSWER : ? YOUR ANSWER : ?
One kg of carbon produces ___ kg of carbon dioxide. 3/7 11/7 4/11 11/3 TRUE ANSWER : ? YOUR ANSWER : ?
The condition for the reversibility of a cycle is The working parts of the engine must be friction free All the processes, taking place in the cycle of operation, must be extremely slow 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 TRUE ANSWER : ? YOUR ANSWER : ?
According to kinetic theory of gases, the absolute zero temperature is attained when Pressure of the gas is zero Volume of the gas is zero Specific heat of gas is zero Kinetic energy of the molecules is zero TRUE ANSWER : ? YOUR ANSWER : ?
The efficiency of Carnot cycle depends upon Pressure ratio Cut-off ratio and compression ratio Temperature limits Volume compression ratio TRUE ANSWER : ? YOUR ANSWER : ?
Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats) All of these (p1 v1 - p2, v2)/(γ - 1) [m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)] [m R (T1 - T2)] /(γ - 1) TRUE ANSWER : ? YOUR ANSWER : ?
When the gas is cooled at constant pressure, Both temperature and volume decreases Its temperature increases but volume decreases Its volume increases but temperature decreases Both temperature and volume increases TRUE ANSWER : ? YOUR ANSWER : ?
One molecule of oxygen is __________ times heavier than the hydrogen atom. 16 32 14 12 TRUE ANSWER : ? YOUR ANSWER : ?