This is the Multiple Choice Questions Part 9 of the Series in DC Circuits as one of the Electrical Engineering topic. In Preparation for the REE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electrical Engineering field, Electrical Engineering Books, Journals and other Electrical Engineering References.

#### Continue Practice Exam Test Questions Part 9 of the Series

NETWORK THEOREMS

**Choose the letter of the best answer in each questions.**

โ MCQ in DC Circuits Part 8 | REE Board Exam

401.ย The central terminal of a dry cell is said to be

A.ย positive

B.ย negative

C.ย neutral

D.ย charged

Answer: **Option A**

Solution:

402.ย Aย 24ย Vย batteryย ofย internalย resistanceย rย =ย 4ย โฆย is connectedย toย aย variableย resistanceย R,ย theย rateย of heatย dissipationย inย theย resistorย isย maximumย when theย currentย drawnย fromย theย batteryย isย I.ย Current drawn from the battery will be I/2 when R is equal to

A.ย 8 โฆ

B.ย 12 โฆ

C.ย 16 โฆ

D.ย 20 โฆ

Answer: **Option B**

Solution:

403.ย Whatย isย theย otherย termย usedย forย rechargeable battery?

A.ย primary

B.ย lead-acid

C.ย storage

D.ย nickel-cadmium

Answer: **Option C**

Solution:

E.ย ย NETWORK THEOREMS

404.ย REE Board Exam April 1997

Aย circuitย consistingย ofย threeย resistorsย rated:ย 10 ohms,ย 15ย ohmsย andย 20ย ohmsย areย connectedย in delta.ย Whatย wouldย beย theย resistanceย ofย the equivalent wye connected load?

A.ย 0.30, 0.23 & 0.15 ohm

B.ย 3.0, 4.0 & 5.0 ohms

C.ย 3.33, 4.44 & 6.66 ohms

D.ย 5.77, 8.66 & 11.55 ohms

Answer: **Option C**

Solution:

405.ย EE Board Exam October 1994

Theย equivalentย wyeย element ofย aย 3ย equal resistors each equal to R and connected in delta is

A.ย R

B.ย 3R/2

C.ย R/3

D.ย 3R

Answer: **Option C**

Solution:

406.ย EE Board Exam April 1988

A Barangay power station supplies 60 kW to a load overย 2,500ย ft,ย 100ย mm^{2},ย two-conductorย copper feeder,ย theย resistanceย ofย whichย isย 0.078ย ohmย per 1000 ft. The bus bar voltage is maintained constant at 600 V. Determine the load current.

A.ย 105 A

B.ย 108 A

C.ย 110 A

D.ย 102 A

Answer: **Option B**

Solution:

407.ย EE Board Exam October 1986

Anย LRTย car,ย 5ย kmย distanceย fromย theย Tayuman station,ย takesย 100ย Aย overย aย 100ย mmย hardย drawn copperย trolleyย wireย havingย aย resistanceย ofย 0.270 ohmย perย km.ย Theย railย andย groundย returnย hasย a resistance of 0.06 ohm per km. If the station voltage is 750 V, what is the voltage of the car?

A.ย 585 V

B.ย 590 V

C.ย 595 V

D.ย 580 V

Answer: **Option A**

Solution:

408.ย EE Board Exam April 1989

The LRT trolley system 10 miles long is fed by two substationsย thatย generateย 600ย voltsย andย 560ย volts, respectively. The resistance of the trolley wire and rail return is 0.3 ohm per mile. If the car is located 4 miles from the 600 volt station draws 200 A from the line.ย Howย muchย isย theย currentย suppliedย byย each station?

A.ย 133.33 A, 66.67 A

B.ย 123.67 A, 76.33 A

C.ย 117.44 A, 82.56 A

D.ย 125.54 A, 63.05 A

Answer: **Option A**

Solution:

409.ย EE Board Exam April 1992

In Manila, the LRT runs between Gil Puyat Station andย Tayumanย Station,ย whichย isย 4ย kmย apartย and maintainsย voltagesย ofย 420ย voltsย andย 410ย volts respectively. The resistance of go and return is 0.05 ohm per km. The train draws a constant current of 300ย Aย whileย inย motion.ย Whatย areย theย currents suppliedย byย theย twoย stationsย ifย theย trainย isย atย the distance of minimum potential?

A.ย 175 A, 125 A

B.ย 183 A, 117 A

C.ย 164 A, 136 A

D.ย 172 A, 123 A

Answer: **Option A**

Solution:

410.ย EE Board Exam October 1986

Anย LRTย car,ย 5ย kmย distanceย fromย theย Tayuman station,ย takesย 100ย Aย overย aย 100ย mmย hardย drawn copperย trolleyย wireย havingย aย resistanceย ofย 0.270 ohmย perย km.ย Theย railย andย groundย returnย hasย a resistance of 0.06 ohm per km. If the station voltage is 750 V, what is the efficiency of transmission?

A.ย 78%

B.ย 81%

C.ย 74%

D.ย 79%

Answer: **Option A**

Solution:

411.ย EE Board Exam April 1988

A barangay powerย station supplies 60 kW to a load overย 2,500ย ftย ofย 0002-conductorย copperย feederย the resistance of which is 0.078 ohm per 1,000 ft. The bus bar voltage is maintained constant at 600 volts. Determineย theย maximumย powerย whichย canย be transmitted.

A.ย 220.35 kW

B.ย 230.77 kW

C.ย 242.73 kW

D.ย 223.94 kW

Answer: **Option B**

Solution:

412.ย EE Board Exam April 1991

Twelve similar wires each of resistance 2 ohms are connected so as to form a cube. Find the resistance between the two diagonally opposite corners.

A.ย 1.45 ohms

B.ย 1.66 ohms

C.ย 2.01 ohms

D.ย 1.28 ohms

Answer: **Option B**

Solution:

413.ย EE Board Exam April 1991

Twelve similar wires each of resistance 2 ohms are connected so as to form a cube. Find the resistance between the two corners of the same edge.

A.ย 1.133 ohms

B.ย 1.102 ohms

C.ย 1.125 ohms

D.ย 1.167 ohms

Answer: **Option D**

Solution:

414.ย EE Board Exam October 1991

Twelveย identicalย wiresย eachย ofย resistanceย 6ย ohms are arranged to form the edge of a cube. A current of 40 mA is led into the cube at one corner and out atย the other diagonally oppositeย corners.ย Calculate theย potentialย differenceย developedย betweenย these corners.

A.ย 0.20 V

B.ย 0.28 V

C.ย 0.22 V

D.ย 0.24 V

Answer: **Option A**

Solution:

415.ย EE Board Exam August 1976

Find the value of the voltage V.

A.ย 12.34 V

B.ย 11.24 V

C.ย 12.19 V

D.ย 11.66 V

Answer: **Option A**

Solution:

416.ย EE Board Exam April 1982

Referring to the circuit diagram below, if the charger voltageย isย 130ย volts and the batteryย voltageย isย 120 volts, solve for the current I_{b}.

A.ย -0.215 A

B.ย 0.215 A

C.ย -0.306 A

D.ย 0.306 A

Answer: **Option A**

Solution:

417.ย EE Board Exam August 1977

In the figure below R_{1}ย = 1 ohm, R_{2}ย = 1 ohm, R_{3}ย = 3 ohms, I_{2} = 2 A and V_{B} = 120 V. Find E_{g}.

A.ย 182.41 V

B.ย 153.32 V

C.ย 164.67 V

D.ย 157.22 V

Answer: **Option C**

Solution:

418.ย EE Board Exam October 1980, April 1984

Inย theย dcย circuitย asย shown,ย theย highย resistance voltmeter gives a reading of 0.435 volt. What is the value of the resistance R?

A.ย 4 ohms

B.ย 5 ohms

C.ย 3 ohms

D.ย 2 ohms

Answer: **Option C**

Solution:

419.ย EE Board Exam April 1980

Determine I in the figure.

A.ย 0.028 A

B.ย 0.010 A

C.ย 0.025 A

D.ย 0.014 A

Answer: **Option D**

Solution:

420.ย ECE Board Exam April 1999

Inย Kirchhoffโsย currentย law,ย whichย terminalย ofย a resistanceย elementย isย assumedย toย beย atย aย higher potential (more positive) than the other?

A.ย Theย terminalย whereย theย currentย exitsย the resistance elements

B.ย Theย terminalย whereย theย currentย entersย the resistance elements

C.ย Either A or B can be arbitrarily selected

D.ย Theย terminalย closestย toย theย nodeย being analyzed

Answer: **Option B**

Solution:

421.ย ECE Board Exam April 2000

Accordingย toย Kirchhoffโsย currentย law,ย whatย isย the algebraic sum of all currents entering and exiting a node.

A.ย zero

B.ย a negative value

C.ย the algebraic sum of all currents

D.ย a positive value

Answer: **Option A**

Solution:

422.ย ECE Board Exam November 1997

Findย theย Theveninโsย impedanceย equivalentย across R_{2} of a linear close circuit having 10 volts supply in series withย the resistors (R_{1}ย =ย 100 ohms and R_{2} =200 ohms).

A.ย 6.66 ohms

B.ย 6.666 kohms

C.ย 66.6 ohms

D.ย 666 ohms

Answer: **Option C**

Solution:

423.ย ECE Board Exam April 1999

What is a node?

A.ย A terminal point for a loop current

B.ย Aย connectionย pointย betweenย twoย orย more conductors

C.ย A formula

D.ย A mathematical fiction

Answer: **Option B**

Solution:

424.ย ECE Board Exam November 1998

Ifย aย resistanceย elementย isย partย ofย twoย loops,ย how manyย voltageย dropsย mustย beย calculatedย forย that component?

A.ย Two

B.ย Three

C.ย One

D.ย None

Answer: **Option A**

Solution:

425.ย ECE Board Exam April 1998

How many nodes are needed to completely analyze a circuit according to Kirchhoffโs current law?

A.ย One

B.ย Two

C.ย One less than the total number of nodes in the circuit

D.ย All nodes in the circuit

Answer: **Option D**

Solution:

426.ย ECE Board Exam November 1996

Findย theย Theveninโsย impedanceย equivalentย across R_{2}ย of a linear close circuit having 10 volt supply in series with two resistors (R_{1}=50 ohms and R_{2} = 200 ohms).

A.ย 400 ohms

B.ย 40 ohms

C.ย 4 ohms

D.ย 4 kohms

Answer: **Option B**

Solution:

427.ย ECE Board Exam November 1995

In order to match the load to the generator means making load resistance ______.

A.ย lower than generatorโs internal resistance

B.ย increasedย toย moreย generatorโsย internal resistance

C.ย decreased

D.ย equal to generatorโs internal resistance

Answer: **Option D**

Solution:

428.ย Aย circuitย containsย aย 5ย Aย currentย sourceย inย parallel withย anย 8ย ohmย resistor.ย Whatย isย theย Theveninโs voltage and Theveninโs resistance of the circuit?

A.ย 40 V, 8 ฮฉ

B.ย 5/8 V, 40 ฮฉ

C.ย 5 V, 8 ฮฉ

D.ย 5/8 V, 8 ฮฉ

Answer: **Option A**

Solution:

429.ย In the Nortonโs equivalent circuit, the source is a

A.ย ย ย constant voltage source

B.ย ย ย constant current source

C.ย constant voltage, constant current

D.ย none of these

Answer: **Option B**

Solution:

430.ย Theย superpositionย theoremย requiresย asย many circuits to be solved as there are

A.ย ย ย meshes

B.ย ย ย source

C.ย nodes

D.ย all of these

Answer: **Option B**

Solution:

431.ย Three resistors of 6-ohm resistance are connected inย delta.ย Insideย theย deltaย anotherย 6-ohmย resistors areย connectedย inย wye. Findย itsย resistance between any two corners.

A.ย 2 ohms

B.ย 3 ohms

C.ย 4 ohms

D.ย 1 ohm

Answer: **Option C**

Solution:

432.ย Aย 2-wireย dcย distributionย lineย hasย sendingย end voltageย ofย 240ย Vย andย totalย lineย resistanceย ofย 0.4 ohm. The maximum kW that can be transmitted by the line is ____.

A.ย 108

B.ย 72

C.ย 36

D.ย 144

Answer: **Option C**

Solution:

433.ย An active element in a circuit is one which ____.

A.ย receives energy

B.ย supplies energy

C.ย both receives and supplies energy

D.ย none of these

Answer: **Option B**

Solution:

434.ย An passive element in a circuit is one which ____.

A.ย supplies energy

B.ย receives energy

C.ย ย both receives and supplies energy

D.ย none of these

Answer: **Option B**

Solution:

435.ย An electric circuit contains ____.

A.ย active elements only

B.ย passive element only

C.ย both active and passive elements

D.ย none of these

Answer: **Option C**

Solution:

436.ย Aย linearย circuitย isย oneย whoseย parametersย (e.g. resistances etc.) ____.

A.ย change with change in current

B.ย change with change in voltage

C.ย ย doย notย changeย withย changeย inย voltageย and current

D.ย none of these

Answer: **Option C**

Solution:

437.ย In the circuit shown in Fig. 3.1, the number of nodes is ____.

A.ย one

B.ย two

C.ย three

D.ย four

Answer: **Option B**

Solution:

438.ย Inย theย circuitย shownย inย Fig.ย 3.1,ย thereย areย ____ junctions.

A.ย three

B.ย four

C.ย two

D.ย none of these

Answer: **Option B**

Solution:

439.ย The circuit shown in Fig. 3.1 has ____ branches.

A.ย two

B.ย four

C.ย three

D.ย none of these

Answer: **Option C**

Solution:

440.ย The circuit shown in Fig. 3.1 has ____ loops.

A.ย two

B.ย four

C.ย three

D.ย none of these

Answer: **Option C**

Solution:

441.ย Inย theย circuitย shownย inย Fig.ย 3.1,ย thereย areย ___ meshes.

A.ย two

B.ย three

C.ย four

D.ย none of these

Answer: **Option A**

Solution:

442.ย To solve the circuit shown in Fig. 3.2 by Kirchhoffโs laws, we require ______.

A.ย one equation

B.ย two equations

C.ย three equations

D.ย four equations

Answer: **Option C**

Solution:

443.ย Toย solveย theย circuitย shownย inย Fig.ย 3.2ย byย nodal analysis, we require ____

A.ย one equation

B.ย two equation

C.ย three equations

D.ย none of these

Answer: **Option A**

Solution:

444.ย Toย solveย theย circuitย shownย inย Fig.ย 3.2ย by superposition theorem, we require ____

A.ย one circuit

B.ย two circuits

C.ย three circuits

D.ย none of these

Answer: **Option B**

Solution:

445.ย To solve the circuit shown in Fig. 3.2 by Maxwellโs mesh current equation, we require

A.ย one equation

B.ย three equations

C.ย two equations

D.ย none of these

Answer: **Option C**

Solution:

446.ย In the circuit shown in Fig. 3.3, the voltage at node B wrt D is calculated to be 15 V. The current in the 3 ฮฉ resistor will be

A.ย 2 A

B.ย 5 A

C.ย 2.5 A

D.ย none of these

Answer: **Option B**

Solution:

447.ย The current in 2 ฮฉ horizontal resistor in Fig. 3.3 is ____.

A.ย 10 A

B.ย 5 A

C.ย 2 A

D.ย 2.5 A

Answer: **Option D**

Solution:

448.ย Inย orderย toย solveย theย circuitย shownย inย Fig.ย 3.3ย by nodal analysis, we require

A.ย one equation

B.ย two equation

C.ย three equations

D.ย none of these

Answer: **Option A**

Solution:

449.ย The superposition theorem is used when the circuit contains

A.ย a single voltage source

B.ย a number of passive source

C.ย passive elements only

D.ย none of these

Answer: **Option B**

Solution:

450.ย Fig.ย 3.4(b)ย showsย theย Theveninโsย equivalentย circuit of Fig. 3.4(a). The value of Theveninโs voltage V_{th} is ____.

A.ย 20 V

B.ย 24 V

C.ย 12 V

D.ย 36 V

Answer: **Option B**

Solution:

โ MCQ in DC Circuits Part 10 | REE Board Exam

#### Questions and Answers in DC Circuits

Following is the list of practice exam test questions in this brand new series:

**MCQ in DC Circuits**

**MCQ from Number 1 โ 50**Answer key:

**included**

**MCQ from Number 51 โ 100**Answer key:

**included**

**MCQ from Number 101 โ 150**Answer key:

**included**

**MCQ from Number 151 โ 200**Answer key:

**included**

**MCQ from Number 201 โ 250**Answer key:

**included**

**MCQ from Number 251 โ 300**Answer key:

**included**

**MCQ from Number 301 โ 350**Answer key:

**included**

**MCQ from Number 351 โ 400**Answer key:

**included**

**MCQ from Number 401 โ 450**Answer key:

**included**

**MCQ from Number 451 โ 500**Answer key:

**included**

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