MCQs on Voltage Transistor, Z-Transform ROC, S-Plane, Turbine Elements, Faults

Q#1 Voltage transistor is important to chek--------------------?
a) Working saturation
B) Work Cutt Off
C) Defecive

Q#2 Which fault occures due to lightening and thunder storms
(A) L-L (B) L-G C) L-L-G (D) NONE

Q#3 In aerodynamic turbine which element is NOT there
(A) STATOR (B) COMPRESSOR (C) FUEL INTAKE (D) FAN

Q#4 To have variable speed we use
(A) INDUCTION MOTOR (B) TRACTION MOTOR (C) SHUT MOTOR (D) NONE

Q#5 In Z-Transform R.O.C must concentrated at
(A) POLE (B) ZERO (C) ORIGIN (D) Z=1-

Q# 6 Superposition theoram converts its circuits into ---------------- circuits?
(A) NORTON (B) THEVANON (C) BOTH A & B (D) JORDON

Q# 7 Electric flux density at surface is zero than inside sphere --------------- is continuous?

Q# 8 Horizontal line to S-plane is called?
Answer-----------------?

if i am wrong plz guide me also
Q.2 b
Q.3 c
Q.4 b
Q.5 c
Q.6 c
Q.7 magnetic field
Q.8 sorry