SLA Industrial Visit At Substation 133KV/33KV

Q.1) Electricity Generated at

• 33KV Single Phase

• 11KV Single Phase

• 133KV Three Phase

• 11 KV Three Phase

Q.2) What was the purpose of the lightning arrester installed at the visited substation

• Prevent devices from High Voltage Damage

• prevent lightning damage to the apparatus because of high voltages

• Prevent devices from Short Circuit Current

• Prevent devices from over Load Current

Q.3) What was the purpose of the Coupling Capacitor installed at the visited substation

• Remove Low frequency Signal

• Boost the charging Current

• Remove High Frequency Signal

• Boost the Voltage

Q.4) In Step Down Transformer Secondary Voltage (V2) Less than Primary Voltage (V1) because

• N1=N2

• N2>N1

• N2<N1

• V2>V1

Q.5) In an optical fiber cable, how does the signal travel?

• In the form of Voltage Pulses

• In the form of Current Pulses

• In the form of Light

• In the form of Sound Pulses

Q.6) What is the voltage of the three-phase supply at DP

• Single Phase 230 v ,50Hz

• 630 v ,50Hz

• Three Phase (RYB) 420V, 50Hz

• Three Phase

  (RYB)

  630v,50Hz

Q.7)What class of fire extinguisher is suitable for extinguishing electrical fires?

• Class A

• Class B

• Class C

• Class D

Q.8)Which class of fire extinguisher is designed for fires involving ordinary combustible materials such as wood, paper, and cloth?

• Class A

• Class B

• Class C

• Class D

Q.9) Why do conductors used at substations have steel at the center and aluminum at the outer side?

• Aluminum is costly Material

• Skin Effect (AC Current flowing through conductor Mostly prefer to flow over surface rather than center of conductor

• Steel is conductor

• Aluminum is conductor than Steel

Q.10) What is Function of CT

• Step down High Value current for Measurement

• offer High Resistance

• Step up Current

• Step Up Frequency