EE

Hazel Lynn Ramos · 95問 · 2年前

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Kirchoff's current law is applicable to only

junctions in a network

The condition in the Ohm's law is that

the temperature should remain constant

What is a crucial requirement for the transformer oil?

Moisture-free

Overhead system can be designed for operation up to ___.

400 kV

Which type of resistor used to protect electronic circuits from excessive flow of current?

Varistor

Which chemical is commonly used in a breather of electrical systems?

Silica gel

GMC was created by the Energy Regulatory Commission to monitor the compliance of the users of the Grid to the PGC. What does the GMC stands for?

Grid Management Committee

What is the maximum rating of overcurrent protection device for 20A Air conditioning unit?

35A

Fleming's left-hand rule is used for ____, while Fleming's right-hand rule is used for _____.

electric motors, electric generators

How many percent is the maximum continuous load for branch circuit conductor?

80%

The power circuit for bathroom can also supply: i. one luminaire and one receptacle for the same bathroom ii. Two receptacle for the same bathroom and two or more for another bathroom iii. Two receptacle and two luminaire for the same bathroom and two more receptacle and luminaire for another bathroom.

I only

When you place a measuring meter in parallel to the load, the instrument is a/an______.

Voltmeter

In the left hand rule, point finger always represent

Magnetic field

Ampere-hour of a battery depends on ____ of the plates.

Area

When the sole purpose of ac is to produce heat, the selection is based on ____.

RMS value

In EPIRA LAW, what is the maximum long duration voltage variation?

10%

In PEC, the allowable voltage drop for lightning circuit is ____ and ____ in feeder, respectively.

3%, 5%

If an electrical network having one or more than one voltage source, is transformed into equivalent electrical network with a single voltage source (which is short circuit current of previous circuit) with parallel internal resistance of the network with all current source replaced by their internal resistance. The above illustration is called

Norton's theorem

Which is not the basic Rule of PEC 2009?

Construction Rule

Regarding Thevenin's equivalent, which of the following is not correct?

The Thevenin's equivalent resistance is calculated when all voltage sources are open circuited

What is the minimum vertical clearance of service conductor over residential and commercial driveways?

3700 mm

What is the minimum height of receptacle for outdoor outlets?

2000mm

In paralleling A & B transformers, increasing the per unit impedance of transformer A will lead to_____________.

increase load on transformer

It is the total number of sustained customer power interruption within a given period divided by the total number of customers served within the same period.

SAIFI

In RA 7920, What does CPE stands for?

Continuing Professional Education

In Philippine Distribution code, large customer consumes not less than ____ MW

1.0

Who is not a current member of the Board of Electrical Engineering?

Renato Cayetano

Nuclear reactor generally employs

fission

Board of Electrical Engineering is composed of one Chairman and how many members?

What is the minimum size of grounding rod?

16mm

A location not normally subject to dampness or temporarily subject to dampness or wetness in the case of building under construction.

Dry location

A system or circuit conductor that is intentionally grounded.

Grounded conductor

A device intended for the protection of personnel that function to energize a circuit or portion thereof within the established period of time when current to the ground exceeds the values established for class A device.

GFCI

What effect on current flow does reversing the direction of movement conductor in the magnetic field of a generator have

it reverse the direction of current flow

Interpoles are connected ____ with the armature and compensating windings are connected in _______ with the armature

series, series

A Conservator consist of

an air-tight metal drum fixed at the top of the tank

In transformers the purpose of breather is to

extracts the moisture of the air

The advantages of star connection for the same phase voltage is that it gives

extra step up voltage

For an unbalance load, which connection is suitable

4 - wire star connection

The main power sources for a satellite are

solar cell

The conductor used to connect the grounding electrode(s) to the equipment grounding conductor, or to both, at the service, at each building or structure where supplied by feeder(s) or branch circuit(s), or at the source of separately derived system.

Grounding Electrode Conductor

When one electrical circuit controls another electrical circuit through a relay, the circuit is _____ circuit

Relay Control Circuit

Two wattmeter can be used to measure 3-phase power for a

balanced and unbalanced load

The main function of communication satellite is as a(n)

Repeater

Tap changer of transformer is located where?

HV side

In PEC it is defined as installations underground or in concrete slabs or masonry in direct contact with the earth, and locations subject to saturation with water or other liquids such as vehicle washing areas, and location exposed to weather and unprotected.

Wet location

In Philippine Distribution Code, the utility requires the consumer to operate at a power factor not less than _______ percent.

85%

Location of Disconnecting means for air conditioner I. Within insight from II. Can be mounted above the unit III. Can be mounted inside the unit

I only

Based load plants are designed to supply power at _________.

high capital cost and low operating cost

The amplitude modulation generated at a very low voltage or power amplifier is _____________ modulation.

low-level

Which of the following type of fault that used only the equivalent positive impedance of the circuit in the short-circuit calculation?

Three-phase fault

Which of the following define the meaning of load factor?

The ratio of average load to maximum load.

If the magnetic flux through a certain region is changing with time __________.

an emf exist around the boundary

In a capacitor start motor, the capacitor is replaced by an inductor having the same reactance as in capacitor. Then the motor will ___________.

not start

The current is zero in a conductor when NO potential difference is applied because___________.

for every electron with a given velocity there is another with a velocity of equal magnitude and opposite direction

Which of the following transformer has only one winding?

autotransformer

Which of the following AC device is used to measure the angle between the voltage and its current?

phase angle meter

A resistor with resistance R1 and a resistor with resistance R2 are connected in parallel to an ideal battery with emf V. What is the rate of thermal energy generation in the resistor with resistance R1?

V2/R1

The grounded conductor is a/an ___________ grounded conductor.

intentionally

The resistance of a rod does NOT depend on _________.

the shape of its cross-sectional area

A common utility's tariff practice to penalize industrial consumers whose power factor falls below ______ and give incentive for power factor above ______.

85% , 85%

One primary and one secondary terminal of the two-winding transformer are connected to an ohm-meter instrument. What will be the reading on this instrument?

Infinity

When the amplitude of the oscillator in a series RLC circuit is doubled, the __________.

current amplitude is doubled

Which of the following protective device operates on the principle of Kirchoff's Current Law?

Differential Protective Relay

Which of the following will the effect of the electric shock in the human body depend on?

current flowing in the body

The coulomb force F, acts on two charges a distance, r, apart. What is F proportional to?

1/r^2

An LC series circuit with an inductance L and a capacitor C has an oscillation frequency of f. Two inductors, each with inductance L, and two capacitors, each with capacitance C, are all wired in series and the circuit is completed. The oscillation frequency is __________.

Which of these is NOT a simplex type of electronic communication?

Telephone

A good example of kinetic energy is provided by ___________.

a tornado

Current has units of __________.

coulomb/second

The readings of the wattmeter will be the same in two-wattmeter method when _________.

power factor is unity

Modern locomotives are powered by DC motors driven by DC generators. Those are, in turn, driven by diesel engines. Which of the following is the reason for using such a configuration instead of AC general-motor sets?

The DC configuration provides high torque and good incremental power at low speeds, and performs equally well at high speeds

What is the main reason that alternating current replaced direct current for general used?

AC voltages conveniently transformed.

What can usually be assumed as the driving or source voltage for fault and voltage calculations in per unit method?

1 p.u.

Which of the following is NOT a reason why single-phase induction motor run?

Hysteresis

Which of the following is normally a controlled grounding path for current flow?

high impedance circuit

The resistance of resistor 1 is twice of resistor 2. The two are connected in SERIES and a potential difference is maintained across the combination. What is the rate of thermal energy generation in resistor 1?

Twice that in resistor 2

What is the function of the surge tank in the hydro power plant?

Relieve water hammer pressures in the penstock pipe

Which of the following is NOT a property of magnetic field lines?

The lines cross themselves only at right angle.

Is the ground can be intentional or accidental? I. True II. False

I only

In the oscillating LC circuit, then total stored energy is U. The maximum energy stored in the capacitor during one cycle is ____________.

What is the function of protective relays in the protection scheme?

sensing device

What is the electrical analog of a spring constant "k"?

1/C

The starting/ in rush current of the transformer is generally __________ times of its full load current.

Which of the following transformer's winding connection is MOST suitable for an unbalanced load?

Four-wye

Which of the following instrument is suited for high frequency?

Thermocouple

Positive charge is distributed uniformly throughout a non-conducting sphere. The highest electric potential occurs _________.

at the center

Two wires of the same material have the same length but different diameters. They are connected in SERIES to a battery. Which of the following quantity is the same for the two wires?

Current

The Tesla is a unit of ____________.

magnetic flux density

Which of the following limits the number of coils that may be placed on the armature of a DC motor or generator?

coil to coil arcing due to the breakdown of insulation

The magnetic torque exerted on a flat current-carrying loop of wire by a uniform magnetic field B is ______________________________.

maximum when the plane of the loop is parallel to B.

The government agency created under Presidential Degree 269, whose additional mandates includes preparing electrical cooperatives in operating and competing under a deregulated electricity market.

National Electrification Administration

The growth rate of the energy consumption in our country is 6.9%. In how many years will the energy consumption be quadrupled?

20 years

The nameplate of an induction motor lists 1460 rpm as the full load speed. For what frequency was the motor designed?

50 Hz

What is/are the connection of capacitor to improve the power factor of an inductive circuit? I. Parallel II. Series

I only

In an RLC circuits, the impedance at resonance is

minimum

What is the equivalent of 1MWHR?

1,000 kWHR

Generators that receives its field excitation current from internal source?

self-excited excitation

The shunt field of a compound generator is connected across both the series field and the armature. This connection is known as

long shunt

100

Which of the following is most suitable for running in parallel operations?

shunt generator

Math

Math

95問 • 2年前

ESAS Lesson Objectives 1

ESAS Lesson Objectives 1

ESAS Lesson Objectives 2

ESAS Lesson Objectives 2

ESAS Lesson Objectives 3

ESAS Lesson Objectives 3

Other Terms for ESAS

Other Terms for ESAS

Hazel Lynn Ramos · 99問 · 2年前

ESAS Matlab

ESAS Matlab

99問 • 2年前

ESAS 200 objectives 1

ESAS 200 objectives 1

ESAS 200 objectives 2

ESAS 200 objectives 2

ESAS 350 objectives 1

ESAS 350 objectives 1

ESAS 350 objectives 2

ESAS 350 objectives 2

Hazel Lynn Ramos · 44問 · 2年前

ESAS 350 objectives 3

ESAS 350 objectives 3

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EE Lesson Objectives 1

EE Lesson Objectives 1

EE Lesson Objectives 2

EE Lesson Objectives 2

EE Lesson Objectives 3

EE Lesson Objectives 3

Hazel Lynn Ramos · 100問 · 1年前

EE Terms Additional

EE Terms Additional

100問 • 1年前