Power System Analysis MCQs Quizlet (Bank of Solved Questions Answers)
1. For absolute stability of the system we use which criteria?
a) equal area
b) half set
c) transient area
d) none of these
2. The value of the zero sequence impedance is…
a) Z 0 = 0
b) Z 0 = Z + 3 Zn
c) Z 0 = Z + 2 Zn
d) Z 0 = Z
3. In transmission line, crona loss is dependent on …
a) length of conductor
b) diameter of the conductor
c) material of the conductor
d) height of hte conductor
4. Bumdled conductors are used to reduce …
a) decrease the capacitance
b) surface electric stress
c) increase electric stress
d) none of these
5. Z bus matrix is normally named as …
a) full matrix
b) half matrix
c) unit matrix
d) none of these
6. When will corona occurs between two transmission corona?
a) carry dc power
b) high potential difference
c) small current
d) none of these
7. In which of the following connections, zero sequence currents does not flow?
a) star
b) delta
c) sigma
d) mesh
8. We use earthing switch for …
a) discharging residual energies
b) charging residual energies
c) measuring energies
d) none of these
9. For medium transmission lines we use which relays?
a) admittance relays
b) mho relays
c) impedance relays
d) none of these
10. What is corona?
a) complete breakdown of air
b) partial braekdown of air
c) sparking between lines
d) none of these
11. Capacitor start motor will gives relatively high ….
a) starting couple
b) starting torque
c) starting impedance
d) none of these
12. Why we use hollow conductors in transmission lines?
a) reduce corona
b) improve stability
c) increase corona
d) all of these