51. Series capacitive compensation in EHV transmission lines is used to
(a) reduce the line loading
(b) improve the stability of the system
(c) reduce the voltage profile
(d) improve the protection of the line
Ans: b
52. A lossless radial tranemission line with surge impedance loading
(a) takes negative VAr at sending end and zero VAr at receiving end
(b) takes positive VAr at sending end and zero VAr at receiving end
(c) has flat voltage profile and unity power factor at all points along it
(d) has sending end voltage higher than receiving end voltage and unity power factor at sending end
Ans: a
53. The X:R ratio of 220 kV line as compared to 400 kV line is
(a) greater
(b) smaller
(c) equal
(d) it could be anything
Ans: b
54. If a line is 100 % series compensated it may result into series resonance at power frequency of
(a) 50 Hz
(c) 150 Hz
(b) 100 Hz
(d) none of the above
Ans: a
55. A 60 Hz, 320 km loesless line has Bending end voltage 1.0 p.u, The receiving end voltage on no load is
(a) 1.1 p.u.
(b) 1.088 p.u.
(c) 1.116 p.u.
(d) none of the above
Ans: b
56. With 100 % series compensation of line.
(a) the circuit is series resonant at power frequency
(b) low transient voltage
(c) high transient current
(d) both (a) and (c)
Ans: d
57. For certain geometry and operating voltage of the uncompensated transmission line, the ratio of power transfer capability to the surge inpedance loading with increase in length
(a) increases
(b) remains unchanged
(c) decreases
(d) uncertain
Ans: c
58. The effect of series capacitance compensation is
(a) to decrease the virtual surge impedance
(b) to decrease the effective length of the line
(c) to increase virtual surge impedance loading
(d) all of the above
Ans: d
59. For a long uncompensatedline the limit to the line loading ill governed by
(a) thermal limit
(b) voltage drop
(c) stability limit
(d) corona loss
Ans: c
60. For any fixed degree of inductive shunt compensation, additional series capacitive compensation
(a) increase the effective length of line
(b) increase virtual surge impedance line
(c) decrease virtual surge impedance loading of the line
(d) none of the above
Ans: d
Read More Questions:
Power Systems MCQs Part1
Power Systems MCQs Part2
(a) reduce the line loading
(b) improve the stability of the system
(c) reduce the voltage profile
(d) improve the protection of the line
Ans: b
52. A lossless radial tranemission line with surge impedance loading
(a) takes negative VAr at sending end and zero VAr at receiving end
(b) takes positive VAr at sending end and zero VAr at receiving end
(c) has flat voltage profile and unity power factor at all points along it
(d) has sending end voltage higher than receiving end voltage and unity power factor at sending end
Ans: a
53. The X:R ratio of 220 kV line as compared to 400 kV line is
(a) greater
(b) smaller
(c) equal
(d) it could be anything
Ans: b
54. If a line is 100 % series compensated it may result into series resonance at power frequency of
(a) 50 Hz
(c) 150 Hz
(b) 100 Hz
(d) none of the above
Ans: a
55. A 60 Hz, 320 km loesless line has Bending end voltage 1.0 p.u, The receiving end voltage on no load is
(a) 1.1 p.u.
(b) 1.088 p.u.
(c) 1.116 p.u.
(d) none of the above
Ans: b
56. With 100 % series compensation of line.
(a) the circuit is series resonant at power frequency
(b) low transient voltage
(c) high transient current
(d) both (a) and (c)
Ans: d
57. For certain geometry and operating voltage of the uncompensated transmission line, the ratio of power transfer capability to the surge inpedance loading with increase in length
(a) increases
(b) remains unchanged
(c) decreases
(d) uncertain
Ans: c
58. The effect of series capacitance compensation is
(a) to decrease the virtual surge impedance
(b) to decrease the effective length of the line
(c) to increase virtual surge impedance loading
(d) all of the above
Ans: d
59. For a long uncompensatedline the limit to the line loading ill governed by
(a) thermal limit
(b) voltage drop
(c) stability limit
(d) corona loss
Ans: c
60. For any fixed degree of inductive shunt compensation, additional series capacitive compensation
(a) increase the effective length of line
(b) increase virtual surge impedance line
(c) decrease virtual surge impedance loading of the line
(d) none of the above
Ans: d
Read More Questions:
Power Systems MCQs Part1
Power Systems MCQs Part2
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