Engineering Thermodynamics - Practice Test

[#296] The pressure exerted by an ideal gas is ________ of the kinetic energy of all the molecules contained in a unit volume of gas.

(A) One-third

(B) Three-forth

(C) One-half

(D) Two-third

Correct Answer

(D) Two-third

[#297] For which of the following substances, the gas laws can be used with minimum error

(A) Dry steam

(B) Wet steam

(C) Saturated steam

(D) Superheated steam

Correct Answer

(D) Superheated steam

[#298] The condition for the reversibility of a cycle is

(A) The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process

(B) All the processes, taking place in the cycle of operation, must be extremely slow

(C) The working parts of the engine must be friction free

(D) All of the above

Correct Answer

(D) All of the above

[#299] If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant

(A) Volume

(B) Pressure

(C) Temperature

(D) Enthalpy

Correct Answer

(A) Volume

[#300] The unit of universal gas constant is

(A) Watt/K

(B) Dyne/°C

(C) Erg/K

(D) None of the above

Correct Answer

(C) Erg/K

Engineering Thermodynamics - Study Mode

[#296] The pressure exerted by an ideal gas is ________ of the kinetic energy of all the molecules contained in a unit volume of gas.

Correct Answer

[#297] For which of the following substances, the gas laws can be used with minimum error

Correct Answer

[#298] The condition for the reversibility of a cycle is

Correct Answer

[#299] If value of n is infinitely large in a polytropic process pVn = C, then the process is known as constant

Correct Answer

[#300] The unit of universal gas constant is

Correct Answer