RMBE2024 PEESub

In pursuant to Republic Act No. 11361 or Anti-Obstruction of Power Line. The

penalty of arresto mayor (First Offense) will cost?

• 100,000

• 200,000

• 50,000

• 70,000

Nine identical wires, each of diameter d and length L, are connected in series.

The combination has the same resistance as a single similar of wire of length

L but whose diameter is:

• 3d

• d/3

• 9d

• d/9

Which of the following statements about induction motors is FALSE?

• Squirrel-cage induction motors operate at essentially constant speeds.

• They have no commutators and no windings on the armature

• They have no slip rings, no brushes, and no excited field current

• They are used to increase the line power factor

A DC system can be protected from lightning by including a thyrite tube in the

circuit that connects the high-voltage line with the ground. Which of the

following is FALSE regarding a thyrite tube?

• Its fusable link melts at high voltages

• It maintains a very high resistance at or below the system operating

  voltage

• Its resistance becomes low at very high voltages

• It has a very fast recovery time with regard to voltage change.

A cylindrical copper rod has a resistance R. It is reformed to twice its original

length with NO change of volume. What is the new resistance?

• 6R

• 4R

• 2R

• 8R

Which of the following transformer winding connection is MOST suitable for

unbalance load?

• Open Delta

• Delta

• Four-Wye

• Three Wye

A three-phase, 345-kV transmission line has a series impedance of (4.0 + j60.0)

Ω and a shunt admittance of j 2.0 x 10-3 S. Using 100 MVA and the line voltage

as base values, calculate the per-unit shunt admittance of the line.

• j3.57 pu

• j4.76 pu

• j5.95 pu

• j2.38 pu

A capacitor in an LC oscillator has a maximum potential difference of 15 V and

a maximum energy of 360 μJ. At a certain instant the energy in the capacitor is

40 μJ. At that instant what is the potential difference across the capacitor?

• 5 V

• 10 V

• 20 V

• 15 V

ACSR conductor having 7 steel strands surrounded by 25 aluminum conductors will

be specified as?

• 25|7

• 7|25

• 32|25

• 7|32

Rapid stopping of a motor by momentarily connecting the motor in reverse

direction is called

• Plugging

• Jogging

• Inching

• Sequence operation