MCQs of Transmission Line Parameters (Power System - I - 3140914)

Power System - I (3140914) MCQs

MCQs of Transmission Line Parameters

Showing 11 to 20 out of 103 Questions

11.

A bundled conductor line compared to a single conductor line (with same conductor cross-sectional area and same mean distance between conductors) has Self GMD, Mutual GMD and Inductance/phase

(a)	Lower, nearly same and higher
(b)	Higher, lower and nearly same
(c)	Higher, nearly same and lower
(d)	Lower, higher and higher

12.

Consider the following statements :
1. By using bundle conductors in an overhead line, the corona loss is reduced.
2. By using bundle conductors, the inductance of transmission line increases and capacitance reduces.
3. Corona loss causes interference in adjoining communication lines.
Which of these statements are correct ?

(a)	1 and 2
(b)	2 and 3
(c)	1 and 3
(d)	1, 2 and 3

13.

The component inductance due to the internal flux-linkage of a non-magnetic straight solid circular conductor per meter length, has a constant value, and is independent of the conductor-diameter, because

(a)	All the internal flux due to a current remains concentrated on the peripheral region of the conductor
(b)	The internal magnetic flux-density along the radial distance from the centre of the conductor increases proportionately to the current enclosed
(c)	The entire current is assumed to flow along the conductor axis and the internal flux is distributed uniformly and concentrically
(d)	The current in the conductor is assumed to be uniformly distributed throughout the conductor cross-section

14.

Which one of the following statements is not correct for the use of bundled conductors in transmission lines ?

(a)	Control of voltage gradient
(b)	Reduction in corona loss
(c)	Reduction in radio interference
(d)	Increase in interference with communication lines

15.

A 3-phase transmission line conductors were arranged in horizontal spacing, with d as the distance between adjacent conductors. If these conductors are rearranged to form an equilateral triangle with sides equal d, then the

(a)	Capacitance and the inductance will increase
(b)	Capacitance will increase and the inductance will decrease
(c)	Capacitance and the inductance will remain the same
(d)	Capacitance will decrease and the inductance will increase

16.

The inductance per unit length of an overhead line due to internal flux linkages

(a)	Depends on the size of the conductor
(b)	Is independent of the size of conductor and constant
(c)	Depends on the current through the conductor
(d)	Depends on distance between conductors

17.

A three-phase, 50 Hz transmission line has a capacitance of line to neutral C_n = 0.01 μF/km. The voltage of the line is 100 kV. The charging current per kilometer of line is

(a)	314/√3 A/km
(b)	314/(√3×10³) A/km
(c)	(√3×10³)/314 A/km
(d)	(√3×10³) A/km

18.

Bundle conductor in EHV transmission line results to

(a)	Reduce inductance
(b)	Increase capacitance
(c)	Increase inductance
(d)	Increase resistance

19.

Internal flux linkage due to internal flux of a conductor is

(a)	I×10^–7 Wb-T/m
(b)	0.25I×10^–7 Wb-T/m
(c)	0.5I×10^–7 Wb-T/m
(d)	0.5×10^–7 Wb-T/m

20.

Conductor radius r will have the factious radius r’ for the inductance calculation

(a)	r’ = 2r
(b)	r’ = r
(c)	r’ = 0.7778r
(d)	r’ = r/0.778

Showing 11 to 20 out of 103 Questions