LOOKSFAM NI APOSTOL
Electrical Engineering
Alternators in a hydro
ANSWER
Terms
In the transformer
High tension,
near the core
Neglected for a short line
Capacitance
Curve representing Ohm’s
Linear
law
Overcurrent protective
4 quarter
bends
bends
application
Torque angle continuously
Suspension
type
Very low frequencies as
Capacitive
almost purely
One of the advantages in
Reduce
alternators
harmonics
Effect of corona
Increased
energy loss
Directional power relay
Energy radiated
Liquid electrolyte
Low Capital
The speed of
DC shunt motor is opened
the motor will
become very
high
Ideal full-wave with nonVHF
ASCR (n-1) layer
3n2 – 3n + 1
Electric power from the
Tidal power
sea water
1,800 mm
Equal
parallel
Open circuit test
Core loss
Conventional source of
Coal energy
energy
Magnitude of stator back
Specific
Increases
Channels 2 and 13
Current in L and C at
Peak load
gravity
High Capital
account
Two grounding electrodes
Luminous flux
plants
Half duplex
High cost
Effect of earth is taken into
32
continuously
Low Cost
Peak load plants
0.707 of peak
value
Efficiency is secondary
time
Base Load plants
Sinusoidal
Unstable
increases
One party transmit at a
Loss free RLC circuit
Rms value of pure cosine
Maximum number of
Insulators for high voltage
power plant
Current flow
device is
Medium speed
DC excitation
only
80%
inductive
Bring about
Dummy coil in DC
mechanical
machines
balance of
armature
Purpose of Insulating
Interrupter
EXCEPT:
Hollow spherical conductor Electric field is
zero
Residual magnetism
Self-excited
generator
Delta connected circuit;
Reduced by
Device to measure the
Resistance
one resistor is open
1/3
temperature of the motor
temperature
Reference to armature
Series
winding
Compact arrangement of
Switch gear
detector
Primary disadvantages of
Excessive use
FM over AM
of spectrum
space
switching devices
NOT INCLUDED:
Collection
Voltage regulation is one
Technical Performance
Efficiency
of the important factors
Standards
Not a factor in the
System
Impedance
Least time in starting from
Gas turbine
selection of fuse rating for
cold
power plant
protection
IEEE device number for an 27
Fiber optic cable is based
Under-voltage relay?
Voltage remains the same,
To adjust the power of the
Governor
the current will:
I. Decrease
alternator, adjust the
Feeder
Reflection
II only
II.
Square root of
Increase
L/C
Electrons build up
Purpose of reactor in short
To lessen the
pressure at one point
circuit
current in
Power factor should be
Not less than
short circuit
maintained at the
85%
3W
connection point
Surge impedance
Maximum output power of
a cellular transmitter
Not considered in the
Insulation
level
For constant transmission
Reduced to
selection of surge arrester
efficiency, Voltage is
(1/n^2) times
In full-wave rectification, if
increased n times, the size
of the original
the input is 60 Hz, then
120 Hz
output has a frequency of
of the conductor would be
Copper loss of a
Current flow
Short- circuit
transformer
Specific gravity of a lead-
State of
acid cell
charge
Power transmission
Proportional
Commonly used light
Charge
capacity of the
to the square
sensor in a modern fax
couple device
transmission
of the voltage
machine
Positive sequence
Three-phase
Standard candle emits a
impedance
fault
total luminous flux of
Positive and Negative
Line to Line
Space station with
sequence impedance
12. 57
Satellite
communication equipment
Impurities in an electrolyte
Local action
Alternator becomes more
Increases
lagging
Alternators becomes more
which have high
Decreases
leading
In a commutator
capacitance
Mica is harder
of a copper wire having
than copper
twice diameter of another
Conservator
What kind of device is a
diode
temperature
If the line frequency is 60
70 to 80
disconnects the auxiliary
Material commonly used
Paper
Saturation of
voltage builds up till
iron
voltage cables
Slip rings are made of
For a series RLC circuit at
Maximum,
For proper parallel
resonance, the current
unity
operation, ac polyphase
Becomes
same
doubled, its capacitance
doubled
Series field of a short
shunt compound dc
Wye delta starting is
58 %
Voltage rating
The reciprocal of
with
permeability
These days DC motors are Electric
The rms value and mean
widely used in
tractions
value is the same
Breather mounted on
Calcium
Maximum efficiency of
transformer contains
Load
generator is excited by
autotransformer starting
Reluctivity
Square wave
40.6 %
half-wave rectifier is
Degaussing
metallic parts are
Ideal transformer
Zero
assumption do not include
reactance of
demagnetized is called
Synchronous motors are
Copper
alternators must have the
If the length of a cable is
The process which
120 Hz
In shunt generator the
constrained by
amplitude is
Nonlinear
Hz
for insulation in high
equivalent to
Four times
copper wire is
to variation of atmospheric
Centrifugal switch
Ceramic
Current carrying capacity
Changes in volume in
transformer cooling oil due
Present day capacitors
the winding
Not self-
Voltage applied across its
Increase by
starting
armature is increased by
about 10%
It is difficult to magnetize
Low
10 percent
steel because of its
permeability
Open circuit in the rotor of
Motor will not
SCIM
start
Synchronous speed during Induction
Joule found out that the
The square of
hunting, the damping bars
heat produced in a current
the current
generation
develop
carrying conductor is
At leading p.f. the
proportional to
armature flux in an
Aids
Device function number for 51
alternator
overcurrent relay
Rating of power circuit
In a series RL circuit, the
breakers used to be the
Duty cycle
Is equal to
inductor current
basis in replacing its
The specific resistance p
1m and cross-
contact
is defined as
section of
Resistor was reduced by
75%
1m2 at 20*C
50%. The power
Master control center for a
Mobile
consumed by the resistor
cellular telephone system
telephone
The effect of the dielectric
Reduce the
switching
is to
working
office
voltage
Color reserved for use in
equipment grounding
Green
conductor
Which of the following is
One KWHR
3,413
Current flowing in the
AC
armature conductors
A diversity factor of 2 gives 50
Radar
not a full-duplex
a saving of
Two-wattmeter reading is
Fault to the extinction of
Total clearing
2 is to 1.
arc is known as
time
Once residual magnetism
For an RL circuit, the
power factor cannot be
0, 1
less than
R.A. 7638
The capacitor of power
of a shunt generator is lost
To an external
it may be restored by
battery
connecting its shunt field
Philippine
Not a standard branch
Energy Plan
circuit ampere rating
KVAR
Converts energy of water
factor correction
25 A
Turbine
to mechanical energy
In a balanced three phase
And so are
Instrument connected
wye connected circuit the
the line
across the load
line voltage is equal
currents
Transformer are used to
When power factor is unity
Zero
change the value of the
the reactive power is
0.866
following, EXCEPT:
Voltmeter
Power
An act to ensure and
accelerate the total
Wave winding is best
RA 9136
suited for ___ voltage, ___
electrification of the
current
Philippines
Relative permittivity of
Sparking occurs when a
vacuum
load is switch off because
Inductance
the circuit has high
Use of
not the method of arc
rectifiers
Fault MVA
dispersion
The unit of elastance is
Daraf
Capacitor in a series RC
Plant can never have
Peak
circuit at steady state is:
Potentially lethal electric
Sensitivity of a voltmeter is
In a series RLC circuit, the
The current in RLC circuit,
XL – XC
Minimum
The heat required to raise
Maximum allowable
1 gram of water at 1*C is
3%
Maximum
i.e. at resonance is
series RLC circuit
voltage drop for lighting
Ohms/Volt
impedance at resonance is
Silver
manufacturing of fuse wire
The net reactance in a
Open circuit
expressed as
0.1 A
current
A material best suited for
Unity
Which of the following is
Fault level means
100% load factor
High and Low
Heating value of coal
Calorie
Ash content
circuit
largely depends on
Maximum allowable
Heating effect of current
Vacuum
has an undesirable side
cleaner
voltage drop for feeder
The positive electrode is
5%
Anode
called
Barrier potential of a
0.7 V
Ideal current
source
Minimum rms value if they
Triangular
have same peak value of
wave
Unity p.f.
for ___ voltage, ___current
Most reliable power plant
Steam
supplies the negative
Tuned Circuit
halfwave
Instrument measure the
Megger
insulation of a powerline
UHF
the frequency range of
Varmeter when paired with Power
of a synchronous motor
Lap winding is best suited
Thermocouple
Cellular phone operate in
voltage
Minimum armature current
Not a source of power
In a diode modulator, what
silicon diode
Active element of a circuit
effect in
Low, High
other devices measured
Human body is
Conductor