Power System - II (3150911) MCQs

MCQs of Basic Principles

Showing 101 to 110 out of 135 Questions
8 9 10 11 12 13
101.
Shunt compensation in EHV line is used to
(a) Improve stability
(b) Reduce  fault level
(c) Improve  voltage profile
(d) Substitute for synchronous phase modifier
Answer:

Option (c)

102.
Shunt capacitance in EHV line is restored to
(a) Improve stability
(b) Reduce  fault level
(c) Improve  voltage profile
(d) None of above
Answer:

Option (c)

103.
Insulation coordination for UHV lines above 500 kV is based on
(a) Lightning surges
(b) Lightning surges and switching surges
(c) Switching surges
(d) None of above
Answer:

Option (c)

104.
As compared to AC transmission DC transmission is free from
(a) Inductance
(b) Capacitance
(c) Phase displacement
(d) All of above
Answer:

Option (d)

105.
Consider below statement
1.  No distance limitation related to steady state stability
2.  No reactive power requirement from the system at the two terminals
3.  No substantial effect on fault level of two systems at the terminal in-spite of interconnection
4.  No corona problem
What are the advantages of HVDC transmission?
(a) All of above
(b) 1 and 3
(c) 2 and 4
(d) 3 and 4
Answer:

Option (a)

106.
The DC transmission is mainly at
(a) 50 kV
(b) 132 kV
(c) 254 kV
(d) 500 kV
Answer:

Option (d)

107.
For a 400 kV line, the spacing between phase conductors is around
(a) 20 m
(b) 14 m
(c) 11 m
(d) 8 m
Answer:

Option (c)

108.
In a DC transmission line
(a) It is necessary for the sending end and receiving end to be operated in synchronism
(b) The effect of inductive and capacitive reactance are greater than in AC transmission line of the same rating
(c) There are no effect due to inductive and capacitive reactance
(d) Power transfer capability is limited by stability consideration
Answer:

Option (c)

109.
HVDC transmission is preferred to EHV AC because
(a) HVDC terminal equipment are inexpensive
(b) VAR compensation is not required in HVDC
(c) System stability can be improved
(d) Harmonic problem is avoided
Answer:

Option (c)

110.
Bulk power transmission over long HVDC lines are preferred an account of
(a) Low cost HVDC terminal
(b) No harmonic
(c) Minimum line power loss
(d) Simple protection
Answer:

Option (c)

Showing 101 to 110 out of 135 Questions
8 9 10 11 12 13