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Mass Transfer
Tricky Mass Transfer
Quiz 1
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Q.1
Find the time taken to drytoof moisture (dry basis) if critical moisture content is 30%. If the weight of the wet solid is 5 kg and the product of area and the constant rate is 0.5 kg/min.
a) 20 sec
b) 40 sec
c) 60 sec
d) 80 sec
Q.2
Find the period if the initial and the final moisture content areand 40%. Also the critical moisture content is 30%.
a) Constant rate period
b) Falling rate period
c) Unsaturated period
d) None of the mentioned
Q.3
Find the period if the initial and the final moisture content areand 20%. Also the critical moisture content is 30%.
a) Constant rate period
b) Falling rate period
c) saturated period
d) None of the mentioned
Q.4
At the constant drying period of a batch process, the rate of drying varies accordingly.
a) True
b) False
Q.5
Find the change in moisture content from the given data
a) 0.21
b) 0.12
c) 0.48
d) 0.84
Q.6
Find the initial moisture content for the batch process if the final moisture content is(dry basis) and the constant moisture content is 40%. (Includes constant and falling rate period)
a) 35
b) 30
c) 60
d) None of the mentioned
Q.7
Find the final moisture content for the batch process if the initial moisture content is(dry basis) and the constant moisture content is 40%. (Includes constant and falling rate period)
a) 45
b) 50
c) 60
d) None of the mentioned
Q.8
Falling rate period of a batch process starts at
a) Saturated drying surface
b) Unsaturated drying surface
c) Both unsaturated and saturated region
d) None of the mentioned
Q.9
If the time taken for the moisture removal is obtained from the formula
a) True
b) False
Q.10
There will be a change in the rate of drying of a batch process after the constant drying process.
a) True
b) False
Q.11
Find the Constant rate representation
a) X
b) Y
c) Z
d) A
Q.12
Find the representation of critical moisture content value
a) A
b) B
c) Z
d) Y
Q.13
Find the equilibrium content value
a) A
b) B
c) C
d) Y
Q.14
Falling rate period of the batch drying curve = _______ + ___________
a) Internal movement, unsaturated surface drying
b) Internal movement, saturated surface drying
c) External movement, unsaturated surface drying
d) External movement, saturated surface drying
Q.15
Find the region if the final and the initial moisture content areand(Dry basis) and the critical moisture content is 45%.
a) Constant rate
b) Falling rate
c) Internal movement
d) None of the mentioned
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