Govt Exams Mock Test FREE | Online Quiz Competition

Q1. In a power system with negligible resistance, the fault current at a point is 10 p.u. The series reactance to be included at the fault point to limit the short-circuit current to 5 p.u. is

5 p.u

10 p.u.

0.1 p.u.

0.5 p.u.

Q2. A transmission line is compensated with shunt capacitance \(C_{sh}\). After shunt compensation surge impedance loading will

Decrease

Increases

Unaffected

None of the above

Q3. A string type insulator has \(4\) units with self capacitance \(C\) and shunt capacitance of \(0.3 \times C\). Find the string efficiency.

83.50%

90%

75%

70%

Q4. The surge impedance loading of a 500 km long, 400 KV transmission line is 400 ohms. The SIL(Surge Impedance Loading) is__________.

200 MW

400 MW

1600 MW

2000 MW

Q5. A 132 kV transmission line uses strings of insulators, each insulator rated at 25 kV. The string efficiency can be maximum of 60%. The least number of insulators required in a string is

10

9

8

6

Q6. The units of inertia constant are:

Joule

Hertz

Joule/sec

Sec

Q7. When a 50MVA ,11KV , 3-phase generator is subjected to a 3-phase fault, the fault current is -j5 p.u.. When it is subjected to line-line fault, the positive sequence current is -j4 p.u.. The positive and negative sequence reactances are respectively

j0.2, j0.05

j0.2, j0.25

j0.25, j0.25

j0.05.i0.05

Q8. For a given generator in economic operation mode, the incremental cost is given by \((0.022 P + 12) Rs/MWh, \frac{dP_L}{dP} = 0.18\) and plant panelty factor \(\lambda = 20\), then power generation is

200 MW

300 MW

100 MW

150 MW

Q9. For the bus admittance matrix \(Y_{bus}\) of a \(4\)-bus system given in per unit, the buses having shunt elements are
\(Y_{bus} = j\begin{bmatrix}-5 & 2 & 2.5 & 0 \\2 & -10 & 2.5 & 4 \\2.5 & 2.5 & -9 & 4 \\0 & 4 & 4 & -8 \end{bmatrix}\)

3 & 4

2 & 3

1 & 2

1, 2 & 4

Q10. Consider a solar PV plant with the following specific conditions: Analysis period: 1 year Measured average solar irradiation intensity in 1 year: 150 kWh/\(m^2\) Generator area of the PV plant: 10 \(m^2\) Efficiency factor of the PV modules: 15% Electrical energy actually exported by plant to grid: 135 kWh Calculate the performance ratio.

50%

80%

60%

75%

Quiz

Year 2024

September
Week # 2 Quiz 4

Q1. In a power system with negligible resistance, the fault current at a point is 10 p.u. The series reactance to be included at the fault point to limit the short-circuit current to 5 p.u. is

Q2. A transmission line is compensated with shunt capacitance \(C_{sh}\). After shunt compensation surge impedance loading will

Q3. A string type insulator has \(4\) units with self capacitance \(C\) and shunt capacitance of \(0.3 \times C\). Find the string efficiency.

Q4. The surge impedance loading of a 500 km long, 400 KV transmission line is 400 ohms. The SIL(Surge Impedance Loading) is__________.

Q5. A 132 kV transmission line uses strings of insulators, each insulator rated at 25 kV. The string efficiency can be maximum of 60%. The least number of insulators required in a string is

Q6. The units of inertia constant are:

Q7. When a 50MVA ,11KV , 3-phase generator is subjected to a 3-phase fault, the fault current is -j5 p.u.. When it is subjected to line-line fault, the positive sequence current is -j4 p.u.. The positive and negative sequence reactances are respectively

Q8. For a given generator in economic operation mode, the incremental cost is given by \((0.022 P + 12) Rs/MWh, \frac{dP_L}{dP} = 0.18\) and plant panelty factor \(\lambda = 20\), then power generation is

Q9. For the bus admittance matrix \(Y_{bus}\) of a \(4\)-bus system given in per unit, the buses having shunt elements are
\(Y_{bus} = j\begin{bmatrix}-5 & 2 & 2.5 & 0 \\2 & -10 & 2.5 & 4 \\2.5 & 2.5 & -9 & 4 \\0 & 4 & 4 & -8 \end{bmatrix}\)

Quiz

Year 2024

October Week # 1 Expire on 31 Oct 2024

October Week # 2 Expire on 07 Nov 2024

October Week # 3 Expire on 14 Nov 2024

October Week # 4 Expire on 21 Nov 2024

September Week # 2 Quiz 4

Q1. In a power system with negligible resistance, the fault current at a point is 10 p.u. The series reactance to be included at the fault point to limit the short-circuit current to 5 p.u. is

Q2. A transmission line is compensated with shunt capacitance \(C_{sh}\). After shunt compensation surge impedance loading will

Q3. A string type insulator has \(4\) units with self capacitance \(C\) and shunt capacitance of \(0.3 \times C\). Find the string efficiency.

Q4. The surge impedance loading of a 500 km long, 400 KV transmission line is 400 ohms. The SIL(Surge Impedance Loading) is__________.

Q5. A 132 kV transmission line uses strings of insulators, each insulator rated at 25 kV. The string efficiency can be maximum of 60%. The least number of insulators required in a string is

Q6. The units of inertia constant are:

Q7. When a 50MVA ,11KV , 3-phase generator is subjected to a 3-phase fault, the fault current is -j5 p.u.. When it is subjected to line-line fault, the positive sequence current is -j4 p.u.. The positive and negative sequence reactances are respectively

Q8. For a given generator in economic operation mode, the incremental cost is given by \((0.022 P + 12) Rs/MWh, \frac{dP_L}{dP} = 0.18\) and plant panelty factor \(\lambda = 20\), then power generation is

Q9. For the bus admittance matrix \(Y_{bus}\) of a \(4\)-bus system given in per unit, the buses having shunt elements are \(Y_{bus} = j\begin{bmatrix}-5 & 2 & 2.5 & 0 \\2 & -10 & 2.5 & 4 \\2.5 & 2.5 & -9 & 4 \\0 & 4 & 4 & -8 \end{bmatrix}\)

Record & Track Your Performance

September
Week # 2 Quiz 4

Q9. For the bus admittance matrix \(Y_{bus}\) of a \(4\)-bus system given in per unit, the buses having shunt elements are
\(Y_{bus} = j\begin{bmatrix}-5 & 2 & 2.5 & 0 \\2 & -10 & 2.5 & 4 \\2.5 & 2.5 & -9 & 4 \\0 & 4 & 4 & -8 \end{bmatrix}\)