MCQ
4521. Which of the following method is used for changing power factor from leading to lagging?
shunt capacitor
series capacitor
shunt reactor
any of the above
4522. Proximity effect depends on--
frequency
distance between the conductors
relative permeability
all of the above
4523. Maximum power transfer capability of transmission line can be increased by-
Parallel transmission lines
Using series capacitance
Using bundled conductors
all of the above
4524. Skin effective is more in case of
communication lines
same in both cases
power lines
none of the above
4525. Skin effect depends on-
frequency
conductivity
relative permeability
all of the above
4526. Apart from the skin effect the non-a of the current distribution is also caused by--
bundled conductors
ferranti effect
proximity effect
all of the above
4527. For flat voltage profile system, voltage regulation is-
0%
100%
200%
50%
4528. Ferranti effect will not occur in which of the following transmission lines-
long transmission lines
short transmission lines
medium transmission lines
all of the above
4529. Find the number of strands of ACSR conductor for 3-layer transmission line.
1
7
19
29
4530. Transmission lines are transposed to reduce-
ferranti effect
skin effect
proximity effect
all of above
4531. If skin depth is more, then skin effect is--
more
less
either 1 or 2
none of the above
4532. If sparsity of a 5 bus transmission line is 0.4. Find the number of transmission lines--
6
5
8
3
4533. Under over excitation synchronous phase modifier works as-
shunt capacitor
series capacitor
shunt reactor
any of the above
4534. Which of the following methods is/are used for reactive or voltage compensation?
shunt capacitor
generation excitation control
series capacitor
all of the above
4535. Maximum power transfer in a transmission line can be obtained by—
increasing voltage level
reducing reactance
either 1 or 2
none of the above
4536. A 3-layer and diameter of each strand is d, then find the total diameter of ACSR conductor.
2d
d
3d
5d
4537. Ferranti effect can be compensated by which of the following?
series capacitor
shunt capacitor
all of the above
none
4538. Under excited synchronous phase modifier works as-
shunt capacitor
shunt reactor
series capacitor
any of the above
4539. Stability of a transmission line can be increased by—
shunt capacitor
shunt reactor
series reactor
both 1 and 2
4540. In transmission lines distribution constants--
resistance
inductance and capacitance
inductance and resistance
both 1 and 2