Ybus used in power flow studies and Zbus used in short circuit studies

DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are inverse of each other

Are the same

Are transpose of each other

Have no inter relation

Are inverse of each other

Are the same

Are transpose of each other

Have no inter relation

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DGVCL Exam Paper (11-12-2011)
The effect of electric shock on the human body depends on

Voltage

Duration of contact

Current

All of these

Voltage

Duration of contact

Current

All of these

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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

10 MVA

60 MVA

50 MVA

20 MVA

10 MVA

60 MVA

50 MVA

20 MVA

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DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

Capacitor start motor

Capacitor start capacitor run motor

Universal motor

Split phase motor

Capacitor start motor

Capacitor start capacitor run motor

Universal motor

Split phase motor

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DGVCL Exam Paper (11-12-2011)
The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

90 %

80 %

Less than 90%

More than 90%

90 %

80 %

Less than 90%

More than 90%

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DGVCL Exam Paper (11-12-2011)
In a power plant, a reserve generating capacity which is not in service but is in operation is known as

Firm power

Cold reserve

Spinning reserve

Hot reserve

Firm power

Cold reserve

Spinning reserve

Hot reserve

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) Ybus used in power flow studies and Zbus used in short circuit studies

DGVCL Exam Paper (11-12-2011) The effect of electric shock on the human body depends on

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) The motor used in celling fans is

DGVCL Exam Paper (11-12-2011) The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

DGVCL Exam Paper (11-12-2011) In a power plant, a reserve generating capacity which is not in service but is in operation is known as

DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

DGVCL Exam Paper (11-12-2011)
The effect of electric shock on the human body depends on

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)
The motor used in celling fans is

DGVCL Exam Paper (11-12-2011)
The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

DGVCL Exam Paper (11-12-2011)
In a power plant, a reserve generating capacity which is not in service but is in operation is known as