## Power System MCQ

###### 1.**The charging current in a transmission line**

- Lags the voltage by 90
^{0} - Leads the voltage by 45
^{0} - Leads the voltage by 90
^{0} - Leads the voltage by 180
^{0}

Answer: 3

###### 2. **As the transmission voltage increases, the percentage resistance drop**

**As the transmission voltage increases, the percentage resistance drop**

- Increase
- Decrease
- Remain same
- None

Answer: 2

###### 3. **The coefficient of reflection for current for current for an open ended line is**

**The coefficient of reflection for current for current for an open ended line is**- 1
- 0.5
- -1
- 0

Answer: 3

###### 4. **Ferranti effect on long overhead line is experienced when it is**

**Ferranti effect on long overhead line is experienced when it is**- Lightly loaded
- On full load at upf
- On full load at 0.8pf
- On full load at zfp

Answer: 1

###### 5. **For an overhead line, the surge impedance in taken as**

**For an overhead line, the surge impedance in taken as**- 40 ohm
- 80 ohm
- 100 ohm
- 400 ohm

Answer: 4

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###### 6. **For a good voltage profile under no load conditions a long line needs,**

**For a good voltage profile under no load conditions a long line needs,**- Shunt capacitors at receiving end
- Shunt reactors at receiving end
- Shunt resistance at receiving end
- Shunt capacitor at sending end

Answer: 2

###### 7. **Corona loss is on hilly areas than as plains areas**

**Corona loss is on hilly areas than as plains areas**- less
- Same
- more
- None

Answer: 3

###### 8. **In any transmission line, AD-BC=**

**In any transmission line, AD-BC=**- 1
- 0
- -1
- 2

Answer: 1

###### 9. **If the p.f of load decrease, the line losses,**

**If the p.f of load decrease, the line losses,**- Increase
- Decrease
- Remain same
- None

Answer: 1

###### 10. **The nature of line constants in the rigorous solution of transmission line is**

**The nature of line constants in the rigorous solution of transmission line is**- Distributed parameter
- Lumped parameter
- Both
- None

Answer: 1

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