1. Capacitance in equivalent circuit of a transmission line is due to
(A) leakage of current.
(B) presence of magnetic flux.
(C) difference in potential of line.
(D) current in the line.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
2. Due to sag the conductor between two support takes the form of
(A) catenary
(B) triangle
(C) ellipse
(D) semi-circle.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] A [/accordion-item][/accordion]
3. In power system, presence of earth wire results
(A) increase in line capacitance
(B) increase in line inductance
(C) decrease in line capacitance
(D) decrease in line inductance
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] A [/accordion-item][/accordion]
4. Phase modifier is normally installed in case of
(A) short transmission lines.
(B) medium length lines.
(C) long lines.
(D) for any length of wire.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
5. Coincidence factor is reciprocal of the
(A) power factor
(B) diversity factor.
(C) load factor.
(D) utilization factor.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] B [/accordion-item][/accordion]
6. The purpose of Gaurd Ring in the transmission system is to
(A) reduce the earth capacitance of the lowest unit
(B) increases the earth capacitance of the lowest unit
(C) reduces the transmission losses
(D) none of the above
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] A [/accordion-item][/accordion]
7. The most expensive bus bar scheme is
(A) single bus bar scheme
(B) ring bus bar scheme
(C) double bus bar double breaker scheme
(D) main and transfer scheme
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
8. Guard ring transmission line
(A) improves power factor
(B) reduces earth capacitance of the lowest unit
(C) reduces transmission losses
(D) improves regulation.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] B [/accordion-item][/accordion]
9. Neglecting losses in a transmission system, if the voltage is doubled, for the same power transmission, the weight of conductor material required will be
(A) four times
(B) double
(C) half
(D) one fourth.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] D [/accordion-item][/accordion]
10. Electro-mechanical voltage regulators are generally used in
(A) reactors.
(B) generators.
(C) transformers.
(D) all of the above.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] B [/accordion-item][/accordion]
11. In outdoor substation, the lightening arresters is placed nearer to
(A) the isolator
(B) the current transformer
(C) the power transformer
(D) the current breaker.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]
12. Stability of a system is not affected by
(A) reactance of line
(B) losses
(C) reactance of generator
(D) output torque.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] B [/accordion-item][/accordion]
13. Localization of cable faults done by
(A) short circuit tests.
(B) murray loop tests.
(C) vurley loop tests.
(D) both murray and vurley test.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] D [/accordion-item][/accordion]
14. Transient disturbances arc due to
(A) switching operations
(B) load variations
(C) faults
(D) any of the above.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] D [/accordion-item][/accordion]
15. If receiving end voltage of open circuited or lightly loaded line is more then sending end voltage, the effect is called
(A) corona effect.
(B) seeback effect.
(C) ferranti effect.
(D) raman effect.
[accordion clicktoclose=true tag=h4][accordion-item title=”Answer ⇓” state=closed] C [/accordion-item][/accordion]