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    Ree Exam Reviewer Refresher

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    Jan Henry Jebulan
    A three phase transmission line that is 40 km long has a resistance of 6 ohms and inductance of 20 ohms per phase. The shunt capacitance is negligible. Determine the sending end voltage required to supply 381MVA at 0.8 power factor lagging.

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    Ree Exam Reviewer Refresher

    Uploaded by

    Jan Henry Jebulan
    344 views3 pages
    A three phase transmission line that is 40 km long has a resistance of 6 ohms and inductance of 20 ohms per phase. The shunt capacitance is negligible. Determine the sending end voltage required to supply 381MVA at 0.8 power factor lagging.

    Original Title

    REE EXAM REVIEWER REFRESHER

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    A three phase transmission line that is 40 km long has a resistance of 6 ohms and inductance of 20 ohms per phase. The shunt capacitance is negligible. Determine the sending end voltage required to supply 381MVA at 0.8 power factor lagging.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    344 views3 pages

    Ree Exam Reviewer Refresher

    Uploaded by

    Jan Henry Jebulan
    A three phase transmission line that is 40 km long has a resistance of 6 ohms and inductance of 20 ohms per phase. The shunt capacitance is negligible. Determine the sending end voltage required to supply 381MVA at 0.8 power factor lagging.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 3

    MC^ A 220Kv three phase transmission line is 40 km long.

    The resistance is 6 ohms and the inductance


    per phase is 20 ohms. The shunt capacitance is negligible. Determine the sending end line voltage when
    supplying 381MVA at 0.8 power factor lagging at 220Kv.

    230+j15.4kV
    245+j10.4kV
    143.82+j12.4kV
    240+j15.4kV

    MC^ What is the permitted lighting fixture in clothes closet?

    Pendant
    Recessed mounted*
    Open lights
    Partially enclosed lamp

    MC^ Three resistances of 4, 9, and 11 are connected in series and then in parallel. Find the effective
    resistance in parallel connection.

    11
    24
    25
    2.2

    MC^ A 100V dc shunt motor draws 27-ampere at rated load has 0.25 ohm armature resistance and 50
    ohms shunt field resistance. Find the starting resistance needed to start the motor to limit the starting
    torque to 200% of the rated torque.

    1.25 ohms
    2 ohms
    2.25 ohms
    1.75 ohms*

    MC^ A water heater has 5.5 ohms resistance draws 40.5 A. Calculate the daily kWHr if it is used 1.5
    hr/day.

    9
    13.5*
    25.5
    27

    MC^ The initial rate of rise of current through a coil of L=2H when suddenly connected to a dc supply of
    12 volt is _______ Amp/sec.

    5 Amp/sec
    2 Amp/sec
    4 Amp/sec
    6 Amp/sec

    MC^ Three 5 ohms resistance are connected in wye, find the equivalent delta connected reistance
    25 ohms
    2.22 ohms
    20 ohms
    15 ohms*

    MC^ The resistance phasor of a series RC circuit points to the right. The capacitive reactance phasor
    points _______ while the diagonal of the rectangle having the two phasors as sides represents the ____

    Up, impedance
    Down, impedance*
    Left, current
    Up, total voltage

    MC^ What is the power if V and I are 90 degrees out of phase?

    Infinity
    Maximum
    Zero*
    Constant

    MC^ If the height of the transmission tower is decreased, the capacitance of the line will

    increase*
    decrease
    remain same
    decrease exponentially

    MC^ The voltage regulation is negative when the load is

    Capacitive*
    Inductive
    Resistive
    Inductive and resistive

    MC^ What is the value of a resistor with color Red, Red, Orange?

    22 kilo-ohms*
    24 kilo-ohms
    28 kilo-ohms
    25 kilo-ohms

    MC*Which is NOT a cause for overvoltage in power system?

    Resonance
    Lightning
    Fault*
    Switching

    MC^ A three phase transformer rated 69kV/13.2Kv is connected in wye-delta. What is the turn ratio?
    40/14.2*
    40/7.62
    69/13.2
    69/7.62

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