1. If the supply frequency of a transmission line increases, the skin effect
(a) is increases
(b) is decreases
(c) remain same
(d) become very low [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
2. If the length of a transmission line increases, its capacitive reactance
(a) decreases
(b) increases
(c) remain same
(d) becomes very high [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
3. If the spacing between the conductors of overhead transmission line increases, its inductance is
(a) decreases
(b) increases
(c) remain same
(d) none of above [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
4. The potential across the various discs of suspension string is different due to
(a) self capacitance
(b) shunt capacitance
(c) skin effect
(d) corona losses [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
5. If shunt capacitance of a string of suspension insulators is increases, then its string efficiency is
(a) decreases
(b) increases
(c) remain same
(d) none of the above [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
6. When the string efficiency is increased, then the voltage across the discs nearest to the conductor
(a) increases
(b) decreases
(c) remain the same
(d) none of above [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
7. If the spacing between conductor is increased, the inductance of transmission line
(a) increases
(b) decreases
(c) remains same
(d) none of the above [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
8. If the spacing between conductors is increased, the capacitance of transmission line
(a) increases
(b) decreases
(c) remains same
(d) none of the above [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
9. In overhead lines, if the string efficiency is maximum which means
(a) self capacitance is zero.
(b) shunt capacitance is maximum.
(c) shunt capacitance is zero.
(d) self capacitance is maximum. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
10. In order to improve power factor of a distribution system, the synchronous capacitors are installed at the
(a) receiving end
(b) sending end
(c) intermediate point
(d) substation [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] A [/accordion-item][/accordion]
11. Static capacitors used in transmission line are rated in terms of
(a) kW
(b) kWh
(c) kVAR
(d) farad [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
12. Transposition of transmission line is done to
(a) decrease skin effect.
(b) decrease I2R losses.
(c) balance line voltage drop.
(d) decrease corona. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] C [/accordion-item][/accordion]
13. The constants of the transmission lines are
(a) resistance
(b) inductance
(c) capacitance
(d) all of the above [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] D [/accordion-item][/accordion]
14. Feeder are designed mainly from the point of view of
(a) voltage drop in it.
(b) its current carrying capacity.
(c) operating frequency.
(d) operating voltage. [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]
15. For 66 kV lines the number of insulator discs used are
(a) 2
(b) 5
(c) 8
(d) 10 [accordion clicktoclose=true tag=h4][accordion-item title=”Answer” state=closed] B [/accordion-item][/accordion]