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GATE Questions of THERMODYNAMICS 2014

Gate Questions for Thermodynamics likely to be asked for Gate 2014 is given here. Sample Questions given here will be helpful for all writing XE paper in Gate 2014. Model Question Papers with Answers for Thermodynamics have been prepared affter evaluating previous years questions for engineering sciences in Gate.

THERMODYNAMICS   (XE) - GATE 2014 - SAMPLE QUESTIONS

For a pure substance, at the triple point
(A) only solid and liquid phases co-exist in equilibrium 
(B) only liquid and vapour phases co-exist in equilibrium
(C) only solid and vapour phases co-exist in equilibrium
(D) solid, liquid and vapour phases co-exist in equilibrium

The slope of a Mollier diagram at constant pressure indicates 
(A) enthalpy (B) entropy (C) internal energy (D) temperature

The exergy (or availability) of a system at a specified state 
(A) depends on the conditions of the system alone
(B) depends on the conditions of the environment alone
(C) depends on the conditions of both the system and environment 
(D) depends neither on the conditions of the system nor the environment 

Consider two Carnot heat engines A and B operating in series. Engine A receives heat from a 
reservoir at 1750 K and rejects heat to another reservoir at temperature T. Engine B receives an 
amount of energy same as that rejected by Engine A from the reservoir at temperature T. Engine B 
then rejects heat to another reservoir at 320 K. In both cases, the engines produce some amount of 
work. If the thermal efficiencies of both the engines are the same, then the temperature T is 
approximately
(A) 848 K (B) 748 K (C) 648 K (D) 548 K


The fuel air mixture in a pertrol engine is ignited with a spark plug at the end of compression 
stroke. This process
(A )increases the entropy of the fuel air mixture but decreases the entropy of the spark plug
(B) decreases the entropy of the fuel air mixture but increases the entropy of the spark plug
(C )decreases the entropy of the fuel air mixture and of the spark plug
(D) increases the entropy of the fuel air mixture and of the spark plug


The measured temperature of a system is 30 degree C.Its exact absolute temperature in K is
(A) 303.00 (B)303.10 (C) 303.15 (D) 303.16

For an ideal gas as a working fluid for a given heat input Q, the process that gives the maximum 
work among the following four processes is
(A) isothermal (B) constant volume (C) constant pressure (D) isentropic

At a location where the atmospheric pressure is 98 kPa and the ambient temperature is 30oC, the humidity ratio is 0.01 kg/kg of dry air. A high pressure front moves over the location which changes only the atmospheric pressure to 102kPa,while the humidity ratio remains same.
Q. What is the partial pressure of water vapour in kPa to the first decimal place accuracy before the
high pressure front moves in? 
Q. What is the relative humidity of air under the influence of high pressure front to integer precision in %? 

Related  Gate 2014
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