Chemical Engineering
2021 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE CH 2021 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.
Question 45
Open questionCHNAT2 marksNeeds review
Consider a solid slab of thickness 2L and uniform cross section A. The volumetric rate of heat generation within the slab is
(W m
). The slab loses heat by convection at both ends to air with heat transfer coefficient
. Assuming steady state, one-dimensional heat transfer, the temperature profile within the slab along the thickness is given by:
where
is the thermal conductivity of the slab and
is the surface temperature. If
K, ambient air temperature
K, and Biot number (based on L as the characteristic length) is 0.5, the maximum temperature in the slab is ________ K (round off to nearest integer).Log in to check the answer
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Open questionCHNAT2 marksNeeds review
A distillation column handling a binary mixture of A and B is operating at total reflux. It has two ideal stages including the reboiler. The mole fraction of the more volatile component in the residue (
) is 0.1.The average relative volatility
is 4. The mole fraction of A in the distillate (
) is ________ (round off to 2 decimal places).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 47
Open questionCHNAT2 marksNeeds review
In a batch drying experiment, a solid with a critical moisture content of 0.2 kg H
O/kg dry solid is dried from an initial moisture content of 0.35 kg H
O/kg dry solid to a final moisture content of 0.1 kg H
O/kg dry solid in 5 h. In the constant rate regime, the rate of drying is 2 kg H
O/(m
·h).The entire falling rate regime is assumed to be uniformly linear. The equilibrium moisture content is assumed to be zero.
The mass of the dry solid per unit area is ________ kg/m
(round off to nearest integer).Log in to check the answer
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