Engineering Questions with Answers - Multiple Choice Questions
Separation Processes MCQ’s – Equilibrium Stage Model for Leaching and Washing
1 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.2295
Calculate the number of ideal countercurrent washing stages required.
a) 2.5
b) 2.6
c) 2.8
d) 2.95
View Answer
Answer: d
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 2.95.
2 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.35
Calculate the number of ideal countercurrent washing stages required.
a) 2.5
b) 4.1
c) 2.2
d) 6.14
View Answer
Answer: b
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 4.1.
3 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.1165
Calculate the number of ideal countercurrent washing stages required.
a) 2.0
b) 2.6
c) 2.8
d) 2.95
View Answer
Answer: a
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 2.0.
4 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.55
Calculate the number of ideal countercurrent washing stages required.
a) 4.6
b) 6.4
c) 7.2
d) 2.95
View Answer
Answer: c
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 7.2.
5 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.256
Calculate the number of ideal countercurrent washing stages required.
a) 3.18
b) 2.6
c) a)8
d) 3.67
View Answer
Answer: d
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 3.18.
6 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.318
Calculate the number of ideal countercurrent washing stages required.
a) 2.5
b) 2.6
c) 3.8
d) 3.18
View Answer
Answer: c
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 3.8.
7 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.108
Calculate the number of ideal countercurrent washing stages required.
a) 6.13
b) 2.45
c) 1.95
d) 2.95
View Answer
Answer: c
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 1.94.
8 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.44
Calculate the number of ideal countercurrent washing stages required.
a) 2.5
b) 5.3
c) 5.4
d) 5.5
View Answer
Answer: b
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 5.3.
9 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.24
Calculate the number of ideal countercurrent washing stages required.[/expand] a) 3.0
b) 3.7
c) 2.8
d) 3.95
View Answer
Answer: a
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 3.0.
10 - Question
If YN+1= 0.0005
XN= 0.001
Y2= 0.01174
YL=XL= 0.05
L/V= 0.29
Calculate the number of ideal countercurrent washing stages required.
a) 3.5
b) 3.6
c) 3.8
d) 3.95
View Answer
Answer: a
Explanation: N= log(XN-YN+1/YL-Y2)/log(L/V), hence N= 3.5.