ISRO Scientist or Engineer Mechanical 2013
For the following questions answer them individually
ISRO Scientist or Engineer Mechanical 2013 - Question 32
For a given heat flow and for the same thickness, the temperature drop across the material will be maximum for
ISRO Scientist or Engineer Mechanical 2013 - Question 33
Select statements from List II matching the processes in List I. Enter your answer as , B if the correct choice for (1) is (A) and that for (2) is (B)
ISRO Scientist or Engineer Mechanical 2013 - Question 34
In a radiative heat transfer, a gray surface is one
ISRO Scientist or Engineer Mechanical 2013 - Question 35
A system undergoes a state change from 1 to 2. According the second law of thermodynamicsfor the process to be feasible, the entropy change, S2 — S1 of the system
ISRO Scientist or Engineer Mechanical 2013 - Question 36
In descending order of magnitude, the thermal conductivity of (a) pure iron, (b) liquid water, (c) saturated water vapour and (d) aluminum can be arranged as
ISRO Scientist or Engineer Mechanical 2013 - Question 37
For the same inlet and outlet temperatures of hot and cold fluids, the Log Mean Temperature Difference (LMTD)is
ISRO Scientist or Engineer Mechanical 2013 - Question 38
A positive value of Joule-Thonison coefficient of a fluid means
ISRO Scientist or Engineer Mechanical 2013 - Question 39
A Carnot engine.rejects 30%of absorbed heat to a sink at $$30^\circ C$$. The temperature of the heat source is
ISRO Scientist or Engineer Mechanical 2013 - Question 40
An engine operates between temperaturelimits of 900 K and T and T and 400 K. For both to be equally efficient, the values of T will be
