Engineering :: Energy Conversion
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111. |
The insulators for overhead lines are generally made of |
A. |
Copper |
B. |
Aluminium |
C. |
Wood |
D. |
Porcelain |
E. |
Plastic |
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Answer: Option D
Explanation:
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112. |
By increasing sag in the suspended transmission line |
A. |
Tension in the line decreases |
B. |
Tension in the line increases |
C. |
Current carrying capacity of conductor increases |
D. |
Current carrying capacity of conductor decreases |
E. |
None of the above |
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Answer: Option A
Explanation:
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113. |
Sag is provided in overhead transmission lines so that |
A. |
Repairs can be done easily |
B. |
Corona can be reduced |
C. |
Skia effect can be reduced |
D. |
Safe tension is not exceeded |
E. |
None of the above |
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Answer: Option D
Explanation:
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114. |
The string efficiency in an ac system is |
Answer: Option E
Explanation:
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115. |
A 66 kV transmission line carrying power to a distance of 120 kilometre will be termed as |
A. |
Tiny transmission line |
B. |
Very short transmission line |
C. |
Short transmission line |
D. |
Medium transmission line |
E. |
Long transmission line |
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Answer: Option D
Explanation:
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116. |
In a medium transmission line the effect of |
A. |
resistance is negligible |
B. |
capacitance is negligible |
C. |
inductance is negligible |
D. |
resistance and inductance is negligible but effect of capacitance is taken into account |
E. |
resistance, capacitance and inductance is taken into account |
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Answer: Option E
Explanation:
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117. |
A 132 kV transmission line carrying power through a distance of 250 kilometers will be termed as |
A. |
Very short transmission line |
B. |
Short transmission line |
C. |
Long transmission line |
D. |
Trunk line |
E. |
None of the above |
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Answer: Option C
Explanation:
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118. |
In a long transmission line, the effect of |
A. |
resistance and capacitance is taken into account but effect of inductance is neglected |
B. |
resistance and inductance is taken into account but effect of capacitance is neglected |
C. |
capacitance and inductance is taken into account but effect of resistance is neglected |
D. |
resistance, capacitance and inductance is taken into account |
E. |
resistance, capacitance and inductance is neglected |
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Answer: Option D
Explanation:
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119. |
the main cause of power loss in a transmission line is |
A. |
Resistance |
B. |
capacitance is negligible |
C. |
Inductance |
D. |
Both inductance and capacitance |
E. |
None of the above |
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Answer: Option A
Explanation:
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120. |
In any transmission line |
A. |
?BC = 1 - AD |
B. |
AB = CD + 1 |
C. |
AB - CD = -1 |
D. |
AC = BD + 1 |
E. |
AC - BD = -1 |
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Answer: Option A
Explanation:
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