Thermodynamics Test Questions


Q.  When heat is transferred from body A which is at temperature T1 to body B which at temperature T2 and there is no heat loss to the surrounding, what will be the change in entropy (dS) of the universe? (Given T1 > T2)

a. dS will remain constant
b. dS will be positive
c. dS will be negative
d. dS will either positive or negative


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  What is used as an intercooler in multistage compression of vapour compression refrigeration system?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  When two refrigerating cycles are used in series with two different refrigerants, the system is known as
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  What is the desirable characteristic of a refrigerant?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Which refrigerant is widely used in refrigeration facilities of food as cooling of fresh vegetables, dairy products, meat and fish and similar process industries?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  When dry bulb temperature (DBT) and wet bulb temperature (WBT) are measured, greater the difference between DBT and WBT,
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  What is sensible cooling of air?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  When the humidity ratio of air increases the air is said to be
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  How is the natural draught produced for exhaust gases?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Macroscopic thermodynamics ______
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Which among the following systems undergo/es work transfer?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Which of the following is/are mode/s of storage of internal energy in a system?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  A process of application of breaks in a vehicle is
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  A process becomes reversible when
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Carnot cycle is
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  Which of the following is a reversed heat engine?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  According to the Carnot's theorem, the efficiency of a reversible heat engine operating between a same given constant temperature source and a given constant temperature sink is
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  If a reversible heat engine A is operating between the temperature levels T1 and T2 and another reversible heat engine B of different capacity is also operating between the same temperature difference T1 and T2, then the efficiency of reversible heat engine B is
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  An electric current I is passing through a resistor in contact with a reservoir. The internal energy of the resistor is constant. Heat generated is absorbed by surrounding at temperature T0. What will be the effect on entropy of the universe?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  How is heat transfer associated with entropy transfer?
Category: Mechanical Engineering Questions,   Published by: teswesm
MCQs:  What is the entropy transfer associated with work?
Category: Mechanical Engineering Questions,   Published by: teswesm