4091. Work done in case of free expansion is
A. Indeterminate
B. Zero
C. Negative
D. None of these
✅ The correct answer is option B.
Chemical Engineering
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4092. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A. 0
B. 1
C. ∞
D. None of these
✅ The correct answer is option B.
4093. Which of the following liquid metals has the highest thermal conductivity?
A. Molten sodium
B. Molten lead
C. Mercury
D. Molten potassium
✅ The correct answer is option A.
4094. A/an __________ is used for changing the direction of a pipeline.
elbow
union
flange
disc compensator
✅ The correct answer is option A.
4095. Vertical vessels are not supported by
brackets
skirts
columns
saddles
✅ The correct answer is option D.
4096. Floating head heat exchangers are used for the
heat transfer between corrosive fluids.
cases where temperature difference between the shell and the tubes is more (>50°C).
co-current heat transfer systems.
counter-current heat transfer systems.
✅ The correct answer is option B.
4097. Which of the following lengths of heat exchanger tubes are normally not used in practice ?
2.5 metres
6 metres
10 metres
0.5 metre
✅ The correct answer is option C.
4098. The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)
-q
-q/(1-q)
-q/(q-1)
none of these
✅ The correct answer is option B.
4099. The buckling tendency of compression members is always in the direction of the
least radius of gyration.
axis of the load.
perpendicular to the axis of the load.
none of these.
✅ The correct answer is option A.
4100. Two iron pipes of the same nominal diameter but different schedule numbers will have the same
inside diameter
outside diameter
wall thickness
none of these
✅ The correct answer is option A.