Govt Exams Mock Test FREE | Online Quiz Competition

Q1. The size of jacobian matrix of a 13 bus power system with 5 voltage controlled buses and a slack bus is

21 * 21

15 * 15

19 * 19

17 * 17

Q2. A single line diagram of a power system is shown if Fig. The diagonal elements of the \(Z_{bus}\) matrix are

\(Z_{11}=j0.3\:pu\) and \(Z_{22}=j0.3\:pu\)

\(Z_{11}=j0.2\:pu\) and \(Z_{22}=j0.2\:pu\)

\(Z_{11}=j0.3\:pu\) and \(Z_{22}=j0.2\:pu\)

\(Z_{11}=j0.2\:pu\) and \(Z_{22}=j0.3\:pu\)

Q3. A given solar cell has the following specifications: Open-circuit voltage, \(V_{oc}\): 0.7 V, Short-circuit current, \(I_{sc}\): 3.5 A , Fill factor, FF: 0.6, Input power,\(P_{in}\) : 10 W, If the solar cell operates at maximum power point, calculate the efficiency.

12.70 %

14.70 %

13.70 %

15.70 %

Q4. While studying the performance of a short transmission line, only _____ of the line are taken into account.

capacitance and inductance

resistance and inductance

shunt and series capacitance

resistance and capacitance

Q5. The current drawn by the line due to corona losses is

non-sinusoidal

sinusoidal

square

triangular

Q6. In a bulk oil circuit breaker, the oil actually used for arc extinction is about

\(60 \% \) of total

\(40 \% \) of total

\(90 \% \) of total

\(10 \% \) of total

Q7. A string of eight suspension insulators is to be fitted with a grading ring as shown in Fig. If the pin to earth capacitances are all equal to \(C\), find the value of line to pin capacitance \(C_1\) that would give a uniform voltage distribution over the string.

\(C_1 = 3C\)

\(C_1 = C\)

\(C_1 = \frac{3C}{5}\)

\(C_1 = \frac{C}{7}\)

Q8. In a three phase, 5 kV, 5 MVA system, what is the base impedance?

5 Ohms

50 Ohms

500 Ohms

0.2 Ohms

Q9. A short line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is

0.5 lagging

unity

0 leading

0.707 leading

Q10. The unit of transmission line constant ‘B’ is

unit less

Siemens

ohm

per unit

Quiz

Year 2025

November
Week # 2 Quiz 5

Q1. The size of jacobian matrix of a 13 bus power system with 5 voltage controlled buses and a slack bus is

Q2. A single line diagram of a power system is shown if Fig. The diagonal elements of the \(Z_{bus}\) matrix are

Q3. A given solar cell has the following specifications: Open-circuit voltage, \(V_{oc}\): 0.7 V, Short-circuit current, \(I_{sc}\): 3.5 A , Fill factor, FF: 0.6, Input power,\(P_{in}\) : 10 W, If the solar cell operates at maximum power point, calculate the efficiency.

Q4. While studying the performance of a short transmission line, only _____ of the line are taken into account.

Q5. The current drawn by the line due to corona losses is

Q6. In a bulk oil circuit breaker, the oil actually used for arc extinction is about

Q7. A string of eight suspension insulators is to be fitted with a grading ring as shown in Fig. If the pin to earth capacitances are all equal to \(C\), find the value of line to pin capacitance \(C_1\) that would give a uniform voltage distribution over the string.

Q8. In a three phase, 5 kV, 5 MVA system, what is the base impedance?

Q9. A short line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is

Q10. The unit of transmission line constant ‘B’ is

Quiz

Year 2025

December Week # 3 Expire on 14 Jan 2025

December Week # 4 Expire on 21 Jan 2025

January Week # 1 Expire on 31 Jan 2025

January Week # 2 Expire on 07 Feb 2025

November Week # 2 Quiz 5

Q1. The size of jacobian matrix of a 13 bus power system with 5 voltage controlled buses and a slack bus is

Q2. A single line diagram of a power system is shown if Fig. The diagonal elements of the \(Z_{bus}\) matrix are

Q3. A given solar cell has the following specifications: Open-circuit voltage, \(V_{oc}\): 0.7 V, Short-circuit current, \(I_{sc}\): 3.5 A , Fill factor, FF: 0.6, Input power,\(P_{in}\) : 10 W, If the solar cell operates at maximum power point, calculate the efficiency.

Q4. While studying the performance of a short transmission line, only _____ of the line are taken into account.

Q5. The current drawn by the line due to corona losses is

Q6. In a bulk oil circuit breaker, the oil actually used for arc extinction is about

Q7. A string of eight suspension insulators is to be fitted with a grading ring as shown in Fig. If the pin to earth capacitances are all equal to \(C\), find the value of line to pin capacitance \(C_1\) that would give a uniform voltage distribution over the string.

Q8. In a three phase, 5 kV, 5 MVA system, what is the base impedance?

Q9. A short line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is

Q10. The unit of transmission line constant ‘B’ is

Record & Track Your Performance

November
Week # 2 Quiz 5