EE Powerline PB
Which of the following will take least time in starting from cold condition to full load operation
Nuclear powerplant
Steam powerplant
Hydroelectric powerplant
Gas turbine plant
Which of the following relays are used for phase fault on long time?
Impedance relay
Reactance relay
MHO relay
Overcurrent relay
Which is not a consideration in surge arrester?
Arrester class
Current rating
Voltage rating
Insulation coordination
What is the unit of relative permeability
Henry
Henry per meter
Henry per meter squared
It is dimension entity
If the torque angle d is continuously increases, system will become
Stable
Unstable
Oscillatory stable
Asymptotic stable
In an oscillating LC circuit, the total stored energy is U and the maximum charge on the capacitor is !. When the charge on the capacitor is Q/2, the energy stored in the inductor is:
U/2
4 U/3
U/4
3U/4
This amthlab command clears all data and variables stored in memory
Cle
Delete
Clear
Deallocate
Regarding Thevenin's equivalent, which of the following is not correct?
The voltage source in the Thevenin equivalent circuit is open circuit voltage of the network when load is disconnected
The thevenin equivalent resistance is the resistance of the network when all voltage sources are short circuited
The thevenin equivalent resistance is calculated when all voltage sources are open circuited
Thevenin equivalent is the voltage equivalent of the network
Which of the following insulation colors identify the grounded conductor of a branch circuit?
Black
Green
Yellow
White
Which of the following materials have a very high permeabilities?
Paramagnetic materials
Non-magnetic
Ferromagnetic materials
Diamagnetic materials
Which is not a qualification for member of BEE?
Natural born Filipino
Have BSEE degree
At least 10 years practice
At least 40 years old
In a star connected system, the line current is
0.707 times the phase current
Equal to the phase current
1.732 times the phase current
1.414 times the phase current
Which powerplant cannot have a single unit of 100 MW?
Hydro-electric powerplant
Diesel powerplant
Steam power plant
Nuclear powerplant
The heating value of coal largely depends on
Ash Content
Moisture content
Volatile matter
Size of coal particle
Which power plant has a minimum running/operating cost?
Diesel powerplant
Hydro electric powerplant
Coal fired thermal powerplant
Oil fired thermal powerplant
An instrument having current coil and a potential coil
Voltmeter
Wheatstone bridge
Ammeter
Wattmeter
What is IEEE device number for undervoltage relay
59
57
27
87
Which of the following is not a distance Relay?
Impedance relay
Reactacne relay
MHOs Relay
Overcurrent relay
Which of the following is not a cause of noise in communication system?
Heat agitation of electrical component
Manufactured electrical equipment
Atmosphere
Other communication signal
Which of the following equipment used to limit short-circuit current level in substation?
Isolator
Coupling capacitor
Lightning switch
Series reactor
Current limiting reactor are used to:
Improve the voltage regulation
Bring down the fault level to minimum capacity
Improve efficiency
Improve the power factor
Which material ahs the least resistance
Copper
Glass
Aluminum
Porcelain
Buchholz's relay is used in
Motor protection
Line protection
Generator protection
Transformer protection
Which of the following is an instrument transformer
Distribution transformer
Potential transformers
Power transformers
Either of the above
For handling greater currents induction wattmeter's are used in conjunction with
Potential transformers
Current transformers
Power transformers
Either of the above
What is the type of relay that detect excessive current?
Differential relay
Reverse current relay
Overcurrent relay
Overvoltage relay
Which of the following is are drawbacks of SF6 circuit breaker?
Sealing problem of gas
Presence of moisture in the system is dangerous
Either of the above
Both of the above
A magnet moves inside a coil. Which of the following factors can affect the induced emf in the coil? I. The speed at which the magnet moves II. The magnet filed of the magnet II. The number of turns in the coil
I only
I and II only
II and III only
I, II and III
What is ANSI device number for AC time overcurrent Relay?
50
52
51
87
What is the moisture limit of transformer oil?
3-10ppm
60-75ppm
40-50ppm
30-35ppm
When the sole purpose of alternating current is to produce heat. The selection on ___ value of the current
Average
Root Mean Square
Instantaneous
Maximum
What is the maximum number of bends permitted in rigid conduit?
4 quarter bends
3 quarter bends
2 quarter bends
6 quarter bends
Surge impedance of transmission line is given by
(C/L)^1/2
1/(LC)^1/2
(LC)^1/2
(L/C)^1/2
The permeability of material means
Strength of permanent magnet
Strength of an electromagnet
The magnetization left in the iron after exciting the field
The conductivity of a material for magnetic lines of force
APPLIANCE receptacle outlet installed in a DWELLING UNIT for specific appliance, such as laundry equipment, shall be installed within ____ mm for the intended location of the appliance
1200
2000
1500
1800
Two wattmeter method can be used to measure 3-phase power for
Balanced and unbalanced load
Balanced load only
Unbalanced load only
Single phase load
What is the type of communication that only one of the two party can transmit at a time?
Full duplex
Bicomm
Half duplex
Simplex
For constant transmission efficiency, the voltage is increased n times, the size of conductor will be ____
Reduced to (1/n) times of the original
Reduced to (1/n^2) times of the original
Increased to n^2 times of the original
Increased to n^2 times of the original
Which of the following protective relay/s operates in the principle of Kirchhoff's current law?
Overcurrent relay
Undercurrent relay
Reverse current relay
Differential relay
Which of the folliwing will effect of the electric shock in the human body depends on
Voltage flowing in the body
Current flowing in the body
Line power
Resistance in the line
Protection used for personnael against electric shock is
AFCI
Fuse
GFCI
Circuit breaker
Tropical storm is going to the Philippine area of responsibility (PAR), What alaert is to be raised in accordance to the Philippine Distribution Code?
Red alert
Blue alert
Yellow alert
Orange Alert
The direction of magnetic lines
From south to North
From one end of magnetic
From north pole to south pole
None of the above
A common utilities tariff practice to penalize consumers whose power factor falls bekiw ___ and give incentive for power factor above___
80%,90%
75%, 90%
85%, 85%
75%, 85%
Power loss is important for the design of
Feeder
Motor
Generator
Transmission Line
Which is NOT a characteristic of an ideal transformer?
Finite permeability
No losses
Infinite permeability
No leakage flux
The total cost of a diesel power plant per KW of installed capacity is less than that of steam power plant by
5 to 10%
20 to 30%
40 to 50%
70 to 80%
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