EE OBJS

100問 • 1年前

問題一覧

The effect of the dielectric is to

Increase the working voltage

What will happen to an insulating medium if subjected to a voltage more than its basic impulse insulation level? It will ___

Punctured

What type of motor is used for food mixer

Universal

Receptacle outlet shall be located not more than ___ mm above countertop

500

A diesel power plant is best suited as

Standby plant

what is the minimum distance between receptacle outlets in meters of a show window?

In Philippine distribution code purposes, which of the following is not belong ?

To ensure that distribution system will be operated by only one distribution company

The resistance of conductor increases

When length of a conductor increased

which type of the DC motors is not directly connected to the load

Shunt

In the DC motor which one is not considered in determining the speed ?

Thickness of armature lamination

what is the device used and connected to a generator to prevent motorizing?

reverse power relay

Dwelling units at least one receptacle outlet for hallways more than ___ m

A device use for switching carrying and interrupting a system for a both fault and pull load condition

Circuit breaker

Factor in determining specific resistance

Nature of material

Appliances receptacle outlet in dwelling unit for specified appliances shall be installed __ mm of the intended location

1800 mm

What is the minimum ampacity of feeders with motor and other load connected

125% motor FL current plus other current

Installation of wire is based on

Peak

Outdoors outlets one family dwelling shall be installed not more than __ mm at the grade level at the front or back of the family dwelling

2000

What is the best conductor of electricity

Graphite

In Philippine grid code, which notice issued by system operator when the contingency reserve is less than the capacity of the largest generating unit for power import from a single interconnection, whichever is higher

Yellow alert

In Philippine grid code, which alert issued by system of a operator when the contingency reserve is zero, a generation deficiency exists, or there is critical loading or imminent overloading of transmission lines and equipment

Red alert

In Philippine grid code, which notice issued by system operator when peace and order problems exists, which may affect the grid operations.

Security alert

In Philippine grid code, which note is issued by system operator a weather disturbance has entered the Philippine area of responsibility

Weather disturbance alert

Refers to the condition and the loading of transmission lines or substation equipment is between 90% and 100% of the continuous rating

critical loading

In Epira law, a voltage level exceeding 1000 votes up to 34.5 kV is classified as:

Medium voltage

The grid shall be considered at normal state when the loading levers of the transmission line and substation equipment are below __ of their continuous rating

90%

The grid shall be considered normal state when the frequency is within limits of __ and __

59.7 Hz & 60.3 Hz

The component of contingency reserve, which is synchronized to the grid and ready to take on load

Spinning reserve

Spinning reserve is also called

Hot standby reserve

Refers to a generating unit that has fast start capability and can synchronize with the grid to provide its declared capacity for a minimum period of 8 hours

Back up reserve

Back up reserve is also called

Cold standby reserve

Generating capacity that is intended to take care of the loss of the largest synchronize generating unit or the power import from a single grid interconnection, whichever is larger

contingency reserve

if the transmission voltage is increased, the percentage resistance drop will

Decrease

The power transmission capacity of the transmission line is

Proportional to the square of the voltage

The material used for fuse wire must have

Low melting point and high specific resistance

The Buchholz relay is used to protect the

Oil immersed transformer against all internal faults

to protect the power transformer (Y - Y, woth neutral grounded) against fault, the CT will have,

Delta - Delta connection

The location of the lightning arrester is

Near the transformer

Which of the following distribution systems gives the greater reliabilty

Ring system

The power intended to be available even under emergency condition is called

Cold reserve

Series capacitor are used to

Compensate for line inductive reactance

The short circuit in any windings of the transformer is the result of

Impulse voltage

Which of the following relays are used for phase fault on long line?

Impedance relays

The protection from negative sequence current is provided for

Generators

AC system has the following disadvantage over DC system

Charging carbon exists

The voltage regulation is an important factor for the design of

Feeder

Which of the following breaker has a reability and minimum of maintenance

SF6 circuit breaker

If the capacitance of the transmission line is increased, the transmitted power will

Increase

Which of the following method may be used to inject reactive power in the transmission line?

shunt capacitor

the guard wire is firmly connected with

earth wire

the load must not be connected directly on

transmission line

The lighting arrester is installed

at the top of the building

Incase of pin type insulators the petticoats are provided to

to drip out the rainwater and to increase the possible conducting length of the path

If the specific resistance of the conductor is increased, what effect does is the result on the skin effect

decreasing

The capacitor bank is installed

To improve the power factor and voltage magnitude

Pole mounting substation are also known as

outdoor type

A circuit breaker serves the purpose of

all of the above

As compared to steam stations, Hydro power station hub

Both A & B

In Practice the cost of energy transformation is minimal for

Steam power plant

The peak load demand of an industrial area is met by

Diesel power plant

Diversity factor is that

Reciprocal of A

Demand factor for a domestic fan and refrigerator is approximately

0.75 and 1.0

The surge impedance of a transmission line differs from its characteristics impedance, as surge impedance consider line

resistance of finite value

Booster transformers are used to increase the voltage at ...... of a transmission line

intermediate points

The transfer of real power between interconnected stations is affected by

capacitance

Shunt conductance in power transmission lines is due to leakage over the

insulators

Voltage gradient in a cable is highest at the

surface of the conductor

The real part of propagation constant of a transmission line is

attenuation constant

For a span of length of 21. horizontal tension at supports as T weight of the conductor per unit length is w, the maximum value of sag will be

wl^2/ 2T

The sag of the transmission line is affected by

both A and B

Most commonly used supports for high tension lines is

Latticed steel poles

When horizontal tension H increases by 20%, the tension T changes by a

increase of 20%

A transmission line is a circuit with

distributed parameters of R, L, C and G

When the conductor of a three-phase circuit are not spaced equilaterally, the transposition is done to.

C.balance the three phases of the circuit

the transmission line inductance contributed by

the current in other conductor

Regulating transformers are used inpower system to control

load flow

the presence of earth alters the

both A and B

A two terminal pair of network of a transmission line can be represented by a

either A or B

Ferranti effect states that the receiving end voltage on no load is

C. more than that at the sending end

advantage of constant voltage transmission are:

all of the above

A transmission line has value of its A constant as

nearly equal unity

the cause of transient stability is

all of the above

Corona always causes

radio interference

Lamp flicker in secondary distribution system is controlled by

both A and B

Transient stability can be improved by the use of

all of the above

When a line to line fault occurs, the SC current of an alternator depends upon its.

synchrounous reactance

Cause of faults in power system

all of these

The various power system faults can be arranged in the order of increasing severity is

L G L L L L G L L L G

The negative sequence component of a voltage is equal to

complex conjugate of positive sequence component"

In circuit breakers, the arc is initiated by the process of

either A or B

At the open circuited end of a transmission line, the reflection coefficient is

1.0

When a wave propagate on a transmission line, it suffers reflection several times at

sending and other end

advantages lf grounding are:

C. both A and B

When the fuel input to the prime mover of an alternator is increased. it increases its

power output

The generating station with mimimum running cost is

hydro power station

power plant having the maximum efficiency is

nuclear

Tapping in on load tap changing transfomer are provided on

HV side

The cost of the power generation will decrease when the load factor

increases

Water is used only for cooling purposes in

diesel power station

100

turbo alternators usually have

2 poles

ESAS 2.0

Almeda, Abegail S. · 99問 · 2年前

ESAS 2.0

99問 • 2年前

Almeda, Abegail S.

Engineering Economy

Almeda, Abegail S. · 71問 · 2年前

Engineering Economy

71問 • 2年前

Almeda, Abegail S.

Thermodynamics

Almeda, Abegail S. · 99問 · 2年前

Thermodynamics

99問 • 2年前

Almeda, Abegail S.

PEC

Almeda, Abegail S. · 88問 · 2年前

PEC

88問 • 2年前

Almeda, Abegail S.

ESAS OBJS

Almeda, Abegail S. · 100問 · 1年前

ESAS OBJS

100問 • 1年前

Almeda, Abegail S.

ESAS OBJS

Almeda, Abegail S. · 74問 · 1年前

ESAS OBJS

74問 • 1年前

Almeda, Abegail S.

Almeda, Abegail S. · 99問 · 1年前

99問 • 1年前

Almeda, Abegail S.

Almeda, Abegail S. · 65問 · 1年前

65問 • 1年前

Almeda, Abegail S.

問題一覧

The effect of the dielectric is to

Increase the working voltage

What will happen to an insulating medium if subjected to a voltage more than its basic impulse insulation level? It will ___

Punctured

What type of motor is used for food mixer

Universal

Receptacle outlet shall be located not more than ___ mm above countertop

500

A diesel power plant is best suited as

Standby plant

what is the minimum distance between receptacle outlets in meters of a show window?

In Philippine distribution code purposes, which of the following is not belong ?

To ensure that distribution system will be operated by only one distribution company

The resistance of conductor increases

When length of a conductor increased

which type of the DC motors is not directly connected to the load

Shunt

In the DC motor which one is not considered in determining the speed ?

Thickness of armature lamination

what is the device used and connected to a generator to prevent motorizing?

reverse power relay

Dwelling units at least one receptacle outlet for hallways more than ___ m

A device use for switching carrying and interrupting a system for a both fault and pull load condition

Circuit breaker

Factor in determining specific resistance

Nature of material

Appliances receptacle outlet in dwelling unit for specified appliances shall be installed __ mm of the intended location

1800 mm

What is the minimum ampacity of feeders with motor and other load connected

125% motor FL current plus other current

Installation of wire is based on

Peak

Outdoors outlets one family dwelling shall be installed not more than __ mm at the grade level at the front or back of the family dwelling

2000

What is the best conductor of electricity

Graphite

Yellow alert

Red alert

In Philippine grid code, which notice issued by system operator when peace and order problems exists, which may affect the grid operations.

Security alert

In Philippine grid code, which note is issued by system operator a weather disturbance has entered the Philippine area of responsibility

Weather disturbance alert

Refers to the condition and the loading of transmission lines or substation equipment is between 90% and 100% of the continuous rating

critical loading

In Epira law, a voltage level exceeding 1000 votes up to 34.5 kV is classified as:

Medium voltage

The grid shall be considered at normal state when the loading levers of the transmission line and substation equipment are below __ of their continuous rating

90%

The grid shall be considered normal state when the frequency is within limits of __ and __

59.7 Hz & 60.3 Hz

The component of contingency reserve, which is synchronized to the grid and ready to take on load

Spinning reserve

Spinning reserve is also called

Hot standby reserve

Refers to a generating unit that has fast start capability and can synchronize with the grid to provide its declared capacity for a minimum period of 8 hours

Back up reserve

Back up reserve is also called

Cold standby reserve

Generating capacity that is intended to take care of the loss of the largest synchronize generating unit or the power import from a single grid interconnection, whichever is larger

contingency reserve

if the transmission voltage is increased, the percentage resistance drop will

Decrease

The power transmission capacity of the transmission line is

Proportional to the square of the voltage

The material used for fuse wire must have

Low melting point and high specific resistance

The Buchholz relay is used to protect the

Oil immersed transformer against all internal faults

to protect the power transformer (Y - Y, woth neutral grounded) against fault, the CT will have,

Delta - Delta connection

The location of the lightning arrester is

Near the transformer

Which of the following distribution systems gives the greater reliabilty

Ring system

The power intended to be available even under emergency condition is called

Cold reserve

Series capacitor are used to

Compensate for line inductive reactance

The short circuit in any windings of the transformer is the result of

Impulse voltage

Which of the following relays are used for phase fault on long line?

Impedance relays

The protection from negative sequence current is provided for

Generators

AC system has the following disadvantage over DC system

Charging carbon exists

The voltage regulation is an important factor for the design of

Feeder

Which of the following breaker has a reability and minimum of maintenance

SF6 circuit breaker

If the capacitance of the transmission line is increased, the transmitted power will

Increase

Which of the following method may be used to inject reactive power in the transmission line?

shunt capacitor

the guard wire is firmly connected with

earth wire

the load must not be connected directly on

transmission line

The lighting arrester is installed

at the top of the building

Incase of pin type insulators the petticoats are provided to

to drip out the rainwater and to increase the possible conducting length of the path

If the specific resistance of the conductor is increased, what effect does is the result on the skin effect

decreasing

The capacitor bank is installed

To improve the power factor and voltage magnitude

Pole mounting substation are also known as

outdoor type

A circuit breaker serves the purpose of

all of the above

As compared to steam stations, Hydro power station hub

Both A & B

In Practice the cost of energy transformation is minimal for

Steam power plant

The peak load demand of an industrial area is met by

Diesel power plant

Diversity factor is that

Reciprocal of A

Demand factor for a domestic fan and refrigerator is approximately

0.75 and 1.0

The surge impedance of a transmission line differs from its characteristics impedance, as surge impedance consider line

resistance of finite value

Booster transformers are used to increase the voltage at ...... of a transmission line

intermediate points

The transfer of real power between interconnected stations is affected by

capacitance

Shunt conductance in power transmission lines is due to leakage over the

insulators

Voltage gradient in a cable is highest at the

surface of the conductor

The real part of propagation constant of a transmission line is

attenuation constant

For a span of length of 21. horizontal tension at supports as T weight of the conductor per unit length is w, the maximum value of sag will be

wl^2/ 2T

The sag of the transmission line is affected by

both A and B

Most commonly used supports for high tension lines is

Latticed steel poles

When horizontal tension H increases by 20%, the tension T changes by a

increase of 20%

A transmission line is a circuit with

distributed parameters of R, L, C and G

When the conductor of a three-phase circuit are not spaced equilaterally, the transposition is done to.

C.balance the three phases of the circuit

the transmission line inductance contributed by

the current in other conductor

Regulating transformers are used inpower system to control

load flow

the presence of earth alters the

both A and B

A two terminal pair of network of a transmission line can be represented by a

either A or B

Ferranti effect states that the receiving end voltage on no load is

C. more than that at the sending end

advantage of constant voltage transmission are:

all of the above

A transmission line has value of its A constant as

nearly equal unity

the cause of transient stability is

all of the above

Corona always causes

radio interference

Lamp flicker in secondary distribution system is controlled by

both A and B

Transient stability can be improved by the use of

all of the above

When a line to line fault occurs, the SC current of an alternator depends upon its.

synchrounous reactance

Cause of faults in power system

all of these

The various power system faults can be arranged in the order of increasing severity is

L G L L L L G L L L G

The negative sequence component of a voltage is equal to

complex conjugate of positive sequence component"

In circuit breakers, the arc is initiated by the process of

either A or B

At the open circuited end of a transmission line, the reflection coefficient is

1.0

When a wave propagate on a transmission line, it suffers reflection several times at

sending and other end

advantages lf grounding are:

C. both A and B

When the fuel input to the prime mover of an alternator is increased. it increases its

power output

The generating station with mimimum running cost is

hydro power station

power plant having the maximum efficiency is

nuclear

Tapping in on load tap changing transfomer are provided on

HV side

The cost of the power generation will decrease when the load factor

increases

Water is used only for cooling purposes in

diesel power station

100

turbo alternators usually have

2 poles