If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

DGVCL Exam Paper (11-12-2011)
If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

50 MVA

60 MVA

10 MVA

20 MVA

50 MVA

60 MVA

10 MVA

20 MVA

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DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

Tripping fault current

Trapping high frequency waves entering into generator/transformer unit.

Trapping power frequency waves

All of these

Tripping fault current

Trapping high frequency waves entering into generator/transformer unit.

Trapping power frequency waves

All of these

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DGVCL Exam Paper (11-12-2011)
In the protection of transformers, harmonic restraint is used to guard against

Lightning

Unbalanced protection

Switching over voltages

Magnetizing inrush current

Lightning

Unbalanced protection

Switching over voltages

Magnetizing inrush current

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DGVCL Exam Paper (11-12-2011)
The insulation coordination for UHV lines (above 500 kV) is done based on

Switching surges

Lightning surges

Voltage level of the line

Lightning and switching surges

Switching surges

Lightning surges

Voltage level of the line

Lightning and switching surges

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DGVCL Exam Paper (11-12-2011)
Due to skin effect

Uniform current flows through the conductor

Portion of the conductor near the surface carries less current and the core of the conductor carries more current

Current flows through the half cross section of the conductor

Portion of the conductor near the surface carries more current and the core of the conductor carries less current

Uniform current flows through the conductor

Portion of the conductor near the surface carries less current and the core of the conductor carries more current

Current flows through the half cross section of the conductor

Portion of the conductor near the surface carries more current and the core of the conductor carries less current

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DGVCL Exam Paper (11-12-2011)
All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

DC

Negative cycle of sine wave

Positive cycle of sine wave

AC

DC

Negative cycle of sine wave

Positive cycle of sine wave

AC

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

DGVCL Exam Paper (11-12-2011) In carrier current protection, the purpose of the wave trap is for

DGVCL Exam Paper (11-12-2011) In the protection of transformers, harmonic restraint is used to guard against

DGVCL Exam Paper (11-12-2011) The insulation coordination for UHV lines (above 500 kV) is done based on

DGVCL Exam Paper (11-12-2011) Due to skin effect

DGVCL Exam Paper (11-12-2011) All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

DGVCL Exam Paper (11-12-2011)
If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

DGVCL Exam Paper (11-12-2011)
In the protection of transformers, harmonic restraint is used to guard against

DGVCL Exam Paper (11-12-2011)
The insulation coordination for UHV lines (above 500 kV) is done based on

DGVCL Exam Paper (11-12-2011)
Due to skin effect

DGVCL Exam Paper (11-12-2011)
All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?