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DGVCL Exam Paper (11-12-2011)
Hysteresis in an instrument means
The reliability of the instrument
The change in the same reading when the input is first increased and then decreased
The repeatability of the instrument
The inaccuracy due to change in temperature
The reliability of the instrument
The change in the same reading when the input is first increased and then decreased
The repeatability of the instrument
The inaccuracy due to change in temperature
Answer
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Related Question
DGVCL Exam Paper (11-12-2011)
In a series RLC circuit at resonance
Current is minimum and power factor is unity
Current is maximum and power factor is 0.5
Current is minimum and power factor is 0.5
Current is maximum and power factor is unity
Current is minimum and power factor is unity
Current is maximum and power factor is 0.5
Current is minimum and power factor is 0.5
Current is maximum and power factor is unity
Answer
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DGVCL Exam Paper (11-12-2011)
First zone distance relay protects the transmission line section upto
25 % of its full length
80 % of its full length
Its full length
50 % of its full length
25 % of its full length
80 % of its full length
Its full length
50 % of its full length
Answer
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DGVCL Exam Paper (11-12-2011)
The mutual inductance between two unity coupled coils of 9 H and 4 H is
13 H
2.2 H
36 H
6 H
13 H
2.2 H
36 H
6 H
Answer
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DGVCL Exam Paper (11-12-2011)
DC series motors are best suited for traction work because
Torque and speed are inversely proportional to the square of the armature current
Torque and speed are proportional to the square of the armature current
Its torque is proportional to the square of the armature current and speed is inversely proportional to torque
Its torque is proportional to the square of the armature current and speed is directional proporational to torque
Torque and speed are inversely proportional to the square of the armature current
Torque and speed are proportional to the square of the armature current
Its torque is proportional to the square of the armature current and speed is inversely proportional to torque
Its torque is proportional to the square of the armature current and speed is directional proporational to torque
Answer
Explanation
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Torque in d.c motor = k* φ * Ia
In series motor φ α Ia
Tα I²
N α 1/φ
N α 1/T
DGVCL Exam Paper (11-12-2011)
The circuit breaker generally used in railway traction is
Bulk Oil CB
Air break CB
Vacuum CB
Minimum Oil CB
Bulk Oil CB
Air break CB
Vacuum CB
Minimum Oil CB
Answer
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