# Mechanical Engineering Questions And Answers :: Heat Transfer: part1

Mechanical Engineering : Heat Transfer QUESTIONS AND ANSWERS :: part1 : 1 to 5

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2014 and IES 2014 examinations :

 1.The time constant of a thermocouple is the time taken to attain the final temperature to be measured the time taken to attain 50% of the value of initial temperature difference the time taken to attain 63.2% of the value of initial temperature difference determined by the time taken to reach 100�C from 0�C none of the above. ANSWER : : the time taken to attain 63.2% of the value of initial temperature difference Explanation :
 2.Thermal conductivity of water in general with rise in temperature increases decreases remains constant may increase or decrease depending on temperature none of the above. ANSWER : : may increase or decrease depending on temperature Explanation :
 3.Which of the following is the case of heat transfer by radiation blast furnace heating of building cooling of parts in furnace heat received by a person from fireplace all of the above. ANSWER : : heat received by a person from fireplace Explanation :
 4.Heat transfer takes place as per - zeroth law of thermodynamics first law of thermodynamic second law of the thermodynamics Kirchhoff law (e) Stefan's law. opt 5 ANSWER : : second law of the thermodynamics Explanation :
 5.Thermal conductivity of air with rise in temperature increases decreases remains constant may increase or decrease depending on temperature none of the above. ANSWER : : increases Explanation :

More Heat Transfer QUESTIONS AND ANSWERS available in next pages

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