Test
/ /
NERC Questions With Answers
/ // // // //
A /
transmission
/ /
line
/ /
is
/ /
operating
/ /
with
/ //
a /
voltage
/ /
phase
/ /
angle different of 30 degrees between the sending Vs and
/ // // // // // // // // //
the
// /
receiving
/ /
bus
/ /
Vr.
/ /
If
/ /
the
/ /
receiving
/ /
end
/ /
load
/ /
is
/ /
suddenly
/ /
increased,
/ /
the
/ /
,/ voltage /
/ phase /
/ angle /
/ difference /
/ will /
/ be? - // /
/ CORRECT /
/ ANSWERS(S)✔✔The /
/ phase /
/ angle /
/ will /
/ increase. /
/ When load is increased phase angle will increase.
// // // // // // //
A /
load
/ /
has
/ //
a /
power
/ /
factor
/ /
of
/ /
0.9
/ /
lagging.
/ /
If
/ /
the
/ /
load
/ /
draws
/ /
100
/ /
MVA,
/ /
,/ what /
/ is /
/ the /
/ MW draw? - CORRECT ANSWERS(S)✔✔90 pf= mw/mva
// // // // // //
The high side of a delta- // // // // //
wye /
connection
/ /
transformer
/ /
is connected to a power system with 199 kV L-
/ // // // // // // // // //
G /
high
/ /
side
/ /
voltage.
/ /
What
/ /
is
/ /
the
/ /
voltage
/ /
across
/ /
the
/ /
delta
/ /
winding
/ /
of the transformer? - CORRECT ANSWERS(S)✔✔Vl-
/ // // // // //
l= square root of 3 times Vl-g 1.73x191= 345kV
// // // // // // // //
If //
a /
transmission
/ /
, line
/ /
is
/ /
carrying
/ /
400
/ /
MW
/ /
and
/ /
300 MVAR what is the MVA? - CORRECT ANSWERS(S)✔✔3-
/ // // // // // // // //
4-5 triangle 500 MVA
// // //
The /
prime
/ /
mover
/ /
is
/ /
the
/ /
component
/ /
of
/ /
the
/ /
generator
/ /
that
/ /
creates
/ /
the
/ /
rotational
/ /
force.
/ /
In
/ //
a /
typical
/ /
coal
/ /
fired
/ /
steam
/ /