2365 612 electrical sciences with correct answers 2025
Power generated at - correct answer25kv
Power transmitted at - correct answerStepped up from 25kv into 275/400kv and 132kv
Power distributed at - correct answer33/11kV and 230/400v
How are transformers kept cool - correct answerAir, oil or gas
MCB type B, C, D - correct answerBSEN 60898
RCD - correct answerBSEN 61008
Power factor - correct answerThe ratio of true power to apparent power. A better factor means
current use age is reduced so a smaller cable size can be used and lower demand needed
Pf - correct answerTrue power (kW) % Apparent power (kVA)
How to create a leading power factor - correct answerTo correct a lagging power factor we can
use a capacitor (bulk and load connection) or a synchronous motor
Inductance - correct answerhow easily a certain material will induce an electromotive force
(emf) within a circuit.
AC makes it flux any times a second so producing inductive reactance
Inductive Reactance (Xl) - correct answerThe opposition to current of AC caused by inductance
of a circuit, expressed in ohms. 2pieFL
Power generated at - correct answer25kv
Power transmitted at - correct answerStepped up from 25kv into 275/400kv and 132kv
Power distributed at - correct answer33/11kV and 230/400v
How are transformers kept cool - correct answerAir, oil or gas
MCB type B, C, D - correct answerBSEN 60898
RCD - correct answerBSEN 61008
Power factor - correct answerThe ratio of true power to apparent power. A better factor means
current use age is reduced so a smaller cable size can be used and lower demand needed
Pf - correct answerTrue power (kW) % Apparent power (kVA)
How to create a leading power factor - correct answerTo correct a lagging power factor we can
use a capacitor (bulk and load connection) or a synchronous motor
Inductance - correct answerhow easily a certain material will induce an electromotive force
(emf) within a circuit.
AC makes it flux any times a second so producing inductive reactance
Inductive Reactance (Xl) - correct answerThe opposition to current of AC caused by inductance
of a circuit, expressed in ohms. 2pieFL
