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diff --git a/3472/CH41/EX41.1/Example41_1.sce b/3472/CH41/EX41.1/Example41_1.sce
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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 3: ELECTROLYTIC AND ELECTRO-METALLURGICAL PROCESSES
+
+// EXAMPLE : 3.1 :
+// Page number 747-748
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+l = 20.0      // Length of shaft(cm)
+d = 10.0      // Diameter of shaft(cm)
+thick = 1.5   // Layer of nickel(mm)
+J = 195.0     // Current density(A/sq.m)
+n_I = 0.92    // Current efficiency
+g = 8.9       // Specific gravity of nickel
+
+// Calculations
+Wt = %pi*l*d*thick/10*g*10**-3        // Weight of nickel to be deposited(kg)
+ece_nickel = 1.0954                   // Electro-chemical equivalent of nickel(kg/1000 Ah)
+Q_I = Wt*1000/(ece_nickel*n_I)        // Quantity of electricity required(Ah)
+time = Q_I/(%pi*l*d*10**-4*J)         // Time taken(hours)
+
+// Results
+disp("PART IV - EXAMPLE : 3.1 : SOLUTION :-")
+printf("\nQuantity of electricity = %.f Ah", Q_I)
+printf("\nTime taken for the process = %.f hours", time)
diff --git a/3472/CH41/EX41.2/Example41_2.sce b/3472/CH41/EX41.2/Example41_2.sce
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+++ b/3472/CH41/EX41.2/Example41_2.sce
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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 3: ELECTROLYTIC AND ELECTRO-METALLURGICAL PROCESSES
+
+// EXAMPLE : 3.2 :
+// Page number 748
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+no_cells = 600.0    // Number of cells employed for copper refining
+I = 4000.0          // Current(A)
+V = 0.3             // Voltage per cell(V)
+hour = 90.0         // Time of plant operation(hours)
+ece_cu = 1.1844     // Electro-chemical equivalent of copper(kg/1000 Ah)
+
+// Calculations
+Ah_week  = I*hour                           // Ah per week per cell
+Ah_year = Ah_week*52                        // Ah per year per cell
+Wt = no_cells*ece_cu*Ah_year/(1000*10**3)   // Weight of copper refined per year(tonnes)
+energy = V*I*no_cells*hour*52/1000          // Energy consumed(kWh)
+consumption = energy/Wt                     // Consumption(kWh/tonne)
+
+// Results
+disp("PART IV - EXAMPLE : 3.2 : SOLUTION :-")
+printf("\nAnnual output of refined copper = %.f tonnes", Wt)
+printf("\nEnergy consumption = %.1f kWh/tonne\n", consumption)
+printf("\nNOTE: ERROR: Substitution & calculation mistake in the textbook solution")
diff --git a/3472/CH41/EX41.3/Example41_3.sce b/3472/CH41/EX41.3/Example41_3.sce
new file mode 100644
index 000000000..f00c3bb61
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+++ b/3472/CH41/EX41.3/Example41_3.sce
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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 3: ELECTROLYTIC AND ELECTRO-METALLURGICAL PROCESSES
+
+// EXAMPLE : 3.3 :
+// Page number 748
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+hour = 24.0         // Time(hour)
+I = 3500.0          // Average current(A)
+n = 0.9             // Current efficiency
+valency = 3.0       // Aluminium valency
+w = 27.0            // Atomic weight of aluminium
+ece_Ag = 107.98     // Electro-chemical equivalent of silver
+Wt_dep = 0.00111    // Silver deposition by one coulomb(gm)
+
+// Calculations
+chemical_eq_Al = w/valency                    // Chemical equivalent of aluminium
+eme_Al  = Wt_dep/ece_Ag*chemical_eq_Al        // Electro-chemical equivalent of aluminium(gm/coulomb)
+Wt_Al_liberated = I*hour*3600*n*eme_Al/1000   // Weight of aluminium liberated(Kg)
+
+// Results
+disp("PART IV - EXAMPLE : 3.3 : SOLUTION :-")
+printf("\nWeight of aluminium produced from aluminium oxide = %.1f kg", Wt_Al_liberated)