sawal sirf 3 wap7 ka nhi hai dost.. sawal trained staff ka hai mostly. Shuruwat me sabko wap 4 hi mil rha kyun?? iski wajah yahi hai ki 3phaser loco train is a process which goes from WAP 1-4 type of loco... 12th bhi karni hogi to 10th pehle karni padegi bas wahi hisaab kitab hai ye nhi ki eloco kam hai..