1
GATE ME 1993
Subjective
+5
-0
An electric hot plate is maintained at a temperature of $${350^ \circ }C,$$ and is used to keep a solution boiling at $${95^ \circ }C.$$ The solution is contained in cast iron vessel of wall thickness $$25mm,$$ which is enameled inside to a thickness of $$0.8mm$$. The heat transfer coefficient for the boiling solution is $$5.5$$ $$kW/{m^2}K$$ and the thermal conducti-vities of cast iron and enamel are $$50$$ and $$1.05W/mK,$$ respectively. Calculate the $$OHTC$$ and the rate of heat transfer per unit area.
2
GATE ME 1993
MCQ (Single Correct Answer)
+2
-0.6
The radiative heat transfer rate per unit area $$\left( {W/{m^2}} \right)$$ between two plane parallel gray surfaces (emissivity $$=0.9$$) maintained at $$400K$$ and $$300K$$ is ($${{\sigma _b} = }$$ Stephen Boltzmann constant $$5.67 \times {10^{ - 8}}\,\,W/{m^2}{K^4}$$)
A
$$992$$
B
$$812$$
C
$$464$$
D
$$567$$
3
GATE ME 1993
Subjective
+5
-0
For a small project with five jobs, the following data is given GATE ME 1993 Industrial Engineering - Pert and Cpm Question 5 English
(i) Draw the project network in activity on arc mode
(ii) Under $$PERT$$ assumptions, determine the distribution of project duration.
4
GATE ME 1993
MCQ (Single Correct Answer)
+1
-0.3
The outside diameter of a hollow shaft is twice its inside diameter. The ratio of its torque carrying capacity to that of a solid shaft of the same material and the same outside diameter is
A
$$15/16$$
B
$$3/4$$
C
$$1/2$$
D
$$1/16$$
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