The positive, negative and zero sequence per unit impedance of two generators connected in parallel are X1 = 0.12 pu, X2 = 0.096 pu and X0 = 0.036 pu. For LG fault at generator terminals (with 1 pu voltage) the positive sequence current will be

Power Systems
The positive, negative and zero sequence per unit impedance of two generators connected in parallel are X1 = 0.12 pu, X2 = 0.096 pu and X0 = 0.036 pu. For LG fault at generator terminals (with 1 pu voltage) the positive sequence current will be

7.936 pu

10.936 pu

8.936 pu

9.936 pu

7.936 pu

10.936 pu

8.936 pu

9.936 pu

ANSWER DOWNLOAD EXAMIANS APP

Power Systems
Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

75%

90%

50%

86%%

75%

90%

50%

86%%

ANSWER DOWNLOAD EXAMIANS APP

Power Systems
Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero

if both 2 and 3 are satisfied

if the mutual couplings between transmission lines are absent

if the shunt admittances at the buses are ignored

always

if both 2 and 3 are satisfied

if the mutual couplings between transmission lines are absent

if the shunt admittances at the buses are ignored

always

ANSWER DOWNLOAD EXAMIANS APP

Power Systems
What type of back up protection is used for alternators?

IDMT relay.

Impedance relay.

Mho relay.

Buchholz relay.

IDMT relay.

Impedance relay.

Mho relay.

Buchholz relay.

ANSWER DOWNLOAD EXAMIANS APP

Power Systems
A power station supplies the peak load of 50 MW, 40 MW and 70 MW to three localities. The annual load factor is 0.50 p.u. and the diversity factor of the load at the station is 1.55 the maximum demand on the station and average load respectively will be

52 MW.

53 MW.

51.61 MW.

57.5 MW.

52 MW.

53 MW.

51.61 MW.

57.5 MW.

ANSWER DOWNLOAD EXAMIANS APP

Power Systems
Gas coolled reactor

use heavy water as coolant as well as moderator.

both B and C.

use coolant at pressure of 14-28 Kg/cm2 and at temperature of 700°-800° c.

use CO2. or helium as coolant and graphite the moderator.

use heavy water as coolant as well as moderator.

both B and C.

use coolant at pressure of 14-28 Kg/cm2 and at temperature of 700°-800° c.

use CO2. or helium as coolant and graphite the moderator.

ANSWER DOWNLOAD EXAMIANS APP

Power Systems

Power Systems The positive, negative and zero sequence per unit impedance of two generators connected in parallel are X1 = 0.12 pu, X2 = 0.096 pu and X0 = 0.036 pu. For LG fault at generator terminals (with 1 pu voltage) the positive sequence current will be

Power Systems Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

Power Systems Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero

Power Systems What type of back up protection is used for alternators?

Power Systems A power station supplies the peak load of 50 MW, 40 MW and 70 MW to three localities. The annual load factor is 0.50 p.u. and the diversity factor of the load at the station is 1.55 the maximum demand on the station and average load respectively will be

Power Systems Gas coolled reactor

Power Systems
The positive, negative and zero sequence per unit impedance of two generators connected in parallel are X1 = 0.12 pu, X2 = 0.096 pu and X0 = 0.036 pu. For LG fault at generator terminals (with 1 pu voltage) the positive sequence current will be

Power Systems
Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency?

Power Systems
Which of the following statements is/are true? The elements of each row of a Y bus matrix for load flow studies in power system add up to zero

Power Systems
What type of back up protection is used for alternators?

Power Systems
A power station supplies the peak load of 50 MW, 40 MW and 70 MW to three localities. The annual load factor is 0.50 p.u. and the diversity factor of the load at the station is 1.55 the maximum demand on the station and average load respectively will be

Power Systems
Gas coolled reactor