ا مجير طال 01. Select the correct answer 1 The thickness of the layer of insulation on the conductor, in cables, depends upon a. reactive power b. power factor C. voltage d. current carrying capacity 2. In comparison to overhead transmission, in underground systems a. Voltage loss is less b. Fault correction is easier c. Value of charged current is less d. Initial cost of the system is low 3. The insulation resistance of a cable of length 10 km is 1 Mega ohm. Its resistance for 50 km length will be a. 1 Mega ohm b. 5 Mega ohm c. 0.2 Mega ohm d. 50 Mega ohm u bwo cores of a 3-core

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سبار مجير طال
01. Select the correct answer
1) The thickness of the layer of insulation on the conductor, in
cables, depends upon
a, reactive power
b. power factor
C. voltage
d. current carrying capacity
2. In comparison tO overhead transmission, in underground
systems
a. Voltage loss is less
b. Fault correction is easier
c. Value of charged current is less
d. Initial cost of the system is low
). The insulation resistance of a cable of length 10 km is 1 Mega
ohm. Its resistance for 50 km length will be
a. 1 Mega ohm
b. 5 Mega ohm
c. 0.2 Mega ohm
d. 50 Mega ohm
4, The capacitance measured between any two cores of a 3-core
cable with sheath earthed is 3 µF. The capacitance per phase will
be
a. 1.5 µF
b. 6 μF
c. 1 µF
d. None of the above
5.A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by
one of relative permittivity 2, the capacitance of the cable will become
C(A) One half
(B) Double
(C) Four times
(D) None of the above
Transcribed Image Text:سبار مجير طال 01. Select the correct answer 1) The thickness of the layer of insulation on the conductor, in cables, depends upon a, reactive power b. power factor C. voltage d. current carrying capacity 2. In comparison tO overhead transmission, in underground systems a. Voltage loss is less b. Fault correction is easier c. Value of charged current is less d. Initial cost of the system is low ). The insulation resistance of a cable of length 10 km is 1 Mega ohm. Its resistance for 50 km length will be a. 1 Mega ohm b. 5 Mega ohm c. 0.2 Mega ohm d. 50 Mega ohm 4, The capacitance measured between any two cores of a 3-core cable with sheath earthed is 3 µF. The capacitance per phase will be a. 1.5 µF b. 6 μF c. 1 µF d. None of the above 5.A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become C(A) One half (B) Double (C) Four times (D) None of the above
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