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Thermodynamics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q41 ⇒ First law of thermodynamics furnishes the relationship between heat, work and properties of the system [other wrong options] [Discuss in forum] heat and work various properties of the system various thermodynamic processes heat and internal energy. |
Q42 ⇒ The amount of heat required to raise the temperature of 1 kg of water through one Kelvin is called. kilo-Joule [other wrong options] [Discuss in forum] specific heat at constant volume specific heat at constant pressure none of these |
Q43 ⇒ Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant pressure [other wrong options] [Discuss in forum] temperature volume internal energy entropy. |
Q44 ⇒ The value of one bar (in S. I. units) is equal to. 1 x 105 N/m2 [other wrong options] [Discuss in forum] 1 x 102 N/m2 1 x 103 N/m2 1 x 104 N/m2 |
Q45 ⇒ In an isothermal process, the internal energy remains constant [other wrong options] [Discuss in forum] increases decreases first increases and then decreases first decreases and then increases. |
Q46 ⇒ A cycle consisting of two constant pressure and two isentropic processes is known as. none of these [other wrong options] [Discuss in forum] Carnot cycle Stirling cycle Otto cycle |
Q47 ⇒ Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant volume [other wrong options] [Discuss in forum] pressure temperature internal energy entropy. |
Q48 ⇒ A definite area or a space where some thermodynamic process takes place is known as. thermodynamic system [other wrong options] [Discuss in forum] thermodynamic cycle thermodynamic process thermodynamic law |
Q49 ⇒ According to first law of thermodynamics heat and work are mutually convertible [other wrong options] [Discuss in forum] mass and energy are mutually convertible Carnot engine is most efficient mass and light are mutually convertible heat flows from hot substance to cold substance. |
Q50 ⇒ Total heat of a substance is also known as enthalpy [other wrong options] [Discuss in forum] internal energy entropy thermal capacity thermal conductance. |
Q51 ⇒ First law of thermodynamics all of the above. [other wrong options] [Discuss in forum] enables to determine change in internal energy of the system does not help to predict whether the system will or not undergo a change does not enable to determine change in entropy provides relationship between heat, work and internal energy |
Q52 ⇒ Addition of heat at constant pressure to a gas results in raising its temperature and doing external work [other wrong options] [Discuss in forum] raising its temperature raising its pressure raising its volume doing external work. |
Q53 ⇒ Carnot cycle has maximum efficiency for reversible engine [other wrong options] [Discuss in forum] irreversible engine new engine petrol engine diesel engine. |
Q54 ⇒ Measurement of temperature is based on zeroth law of thermodynamics [other wrong options] [Discuss in forum] thermodynamic properties first law of thermodynamics second law of thermodynamics joule's law. |
Q55 ⇒ Carnot cycle efficiency depends upon temperature range of operation [other wrong options] [Discuss in forum] properties of the medium/substance used condition of engine working condition effectiveness of insulating material around the engine. |
Q56 ⇒ Carnot cycle efficiency is maximum when final temperature is 0°K [other wrong options] [Discuss in forum] initial temperature is 0°K difference between initial and final temperature is 0°K final temperature is 0°C initial temperature is minimum possible. |
Q57 ⇒ An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be 650°K [other wrong options] [Discuss in forum] 600°K 625°K 700°K 750°K. |
Q58 ⇒ If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly entropy [other wrong options] [Discuss in forum] temperature enthalpy internal energy all of the above. |
Q59 ⇒ If a system after undergoing a series of processes, returns to the initial state then sum of heat and work transfer will be zero [other wrong options] [Discuss in forum] process is thermodynamically in equilibrium process is executed in closed system cycle its entropy will change due to irreversibility no work will be done by the system. |
Q60 ⇒ An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is possible, but with lot of sophistication [other wrong options] [Discuss in forum] feasible impossible possible desirable. |
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