Power System Lab Quiz-2

What is the value in y2 when the code show below executes?

x1 = [ 5 3 1 7 9]; [y1 y2]=min(x1); 

• 5
• 3
• 1
• 7

What is the value of jj after the Matlab code below executes?

jj=0; for ii=1:2:5 jj=jj+5; end

• 1
• 5
• 15
• 2

What value does the variable q contain after the Matlab code below executes?
q=[1 3 5];
q=a*a;
q=q+2;

• [1 3 5]
• [3 11 27]
• error message
• [3 5 7]

After executing the following script file in MATLAB 
x = [2:4 ; ‐1:1 ; 1 2 3]; 
y=x(2,:); 
size(y') 
the displayed result is

• 1  2
• 1  3
• 2  1
• 3  1

The range of accelerating factor is

• 10 to 20
• 20 to 30
• 15.5 to 20.2
• 1.6 to 1.8

The advantage of Newton Raphson method is

• Large number of iteration
• Less computation time
• Large computer memory is required

The draw back of NR method as compare to Gauss-Seidel method is/are?

• large requirement of computer memory
  
• large number of iterations
• less computation time
• large computation time

In a Gauss Seidel load flow method, the number of iterations may be reduced if the correction in voltage at each bus is multiplied by

• Gauss constant
  
• Acceleration factor
• Blocking factor
• Lagrange multiplier

Incremental cost of two generators I_c1 = 0.2 P₁+60, I_c2 = 0.3 P₂+40 and the ratings of the generator are 150 and 250 MW. Find the load sharing of each generator for a load of 200 MW?

• P₁ = 120 MW, P₂ = 80 MW
  
• P₁ = 80 MW, P₂ = 120 MW
  
• P₁ = 100 MW, P₂ = 100 MW
  
• P₁ = 60 MW, P₂ = 140 MW

Match the following format codes
1. %s        -      1. integer value
2. %d        -      2. compact form of %f
3. %f         -      3. string value 
4. %g        -      4. floating point value

• 2  1  4  3
• 4  2  3  1
• 1  3  2  4
• 3  1  4  2