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WorksheetsNAE-EE
Total questions: 132
Worksheet time: 1hrs 6mins
Name
Class
Date
1.
Which of the following is NOT a property of magnetic field lines?
a)
A_The field is stronger where the lines are closer together.
b)
B_The lines intersect surfaces of equal intensity at right angles.
c)
C_Magnetic field lines have no beginning and no ends.
d)
D_The lines cross themselves only at right angles.
e)
,
2.
Which of the following effects are generally less for an alternating current than for a direct current?
a)
A_heating effects
b)
B_chemical effects
c)
C_magnetic effects
d)
D_impedance
e)
,
3.
Which of the following cannot have a single unit of 100 MW?
a)
A_Hydro power plant
b)
B_Steam power plant
c)
C_Diesel power plant
d)
D_Nuclear power plant
e)
,
4.
n the left hand rule, thumb always represents direction of the _____
a)
A_voltage
b)
B_force on conductor
c)
C_current
d)
D_magnetic field
e)
,
5.
What is/are the main reason/s for using high voltage in the transmission of power in the grid system?I. to transmit bulk power with minimum line lossesII. Increase system reliability
a)
A_II only
b)
B_both I and II
c)
C_either I or II
d)
D_I only
e)
,
6.
Which of the following insulators will be selected for high voltage applications?
a)
A_strain type
b)
B_disc type
c)
C_suspension type
d)
D_pin type
e)
,
7.
The dc armature winding in which the coil sides are placed a pole pitch apart is called ______ winding.
a)
A_Multiplex
b)
B_Full-pitch
c)
C_Fractional pitch
d)
D_Pole-pitch
e)
,
8.
The effect of series capacitor on a transmission line is to improve
a)
A_steady state stability
b)
B_transient stability
c)
C_A and B both
d)
D_none of these
e)
,
9.
In two-wattmeter method, the reading of one of the wattmeters will be zero when
a)
A_load in one of the phases is zero
b)
B_power factor is unity
c)
C_power factor is 0.5
d)
D_neutral is earthed
e)
,
10.
The electric motor generally used in household food mixer.
a)
A_Shaded Pole
b)
B_Universal
c)
C_Split Phase
d)
D_Capacitor Start
e)
,
11.
What type of transformer bank is used to convert 2-phase to 3-phase power?
a)
A_wye-delta
b)
B_scott-T
c)
C_wye-delta
d)
D_delta-delta
e)
,
12.
By increasing the transmission voltage double of its original value, the same power can be dispatched keeping the line loss
a)
A_Equal to its original value
b)
B_Half of the original value
c)
C_Double the original value
d)
D_One-fourth of original value
e)
,
13.
The highest speed attained by a dc shunt motor is
a)
A_equal to infinity at rated flux
b)
B_higher than no load speed at rated flux
c)
C_equal to no load speed at rated flux
d)
D_lower than no load speed at rated flux
e)
,
14.
Chemicals with lower flash points present a greater _______
a)
A_Personal hazard
b)
B_Flammability hazard
c)
C_Explosion hazard
d)
D_Skin hazard
e)
,
15.
The product of rms values of current and voltage is called
a)
A_real power
b)
B_apparent power
c)
C_reactive power
d)
D_polar curves
e)
,
16.
An electric current can neither be _______ nor ________.
a)
A_felt, seen
b)
B_seen, touched
c)
C_seen, produced any effect
d)
D_produced, felt
e)
,
17.
Ohm's law is not applicable to
a)
A_vacuum tubes
b)
B_carbon resistors
c)
C_high voltage circuits
d)
D_circuits with low current densities
e)
,
18.
Which medium has the highest value of dielectric strength?
a)
A_glass
b)
B_porcelain
c)
C_mica
d)
D_quartz
e)
,
19.
Which of the following buses constitute the maximum number in a power system?
a)
A_Slack bus
b)
B_P Q bus
c)
C_P V bus
d)
D_All of these
e)
,
20.
In order to transfer the load from one alternator to another alternator, when they are operating in parallel
a)
A_field current is increased
b)
B_field current is decreased
c)
C_speed is decreased
d)
D_prime mover power input is increased
e)
,
21.
KCL works on the principle of which of the following
a)
A_law of conservation of charge
b)
B_law of conservation of energy
c)
C_both
d)
D_none of these
e)
,
22.
Series capacitors are used to
a)
A_improve the line voltage
b)
B_compensate for line inductive reactance
c)
C_compensate for line capacitive reactance
d)
D_none of these
e)
,
23.
Which of the following distribution systems gives the greater reliability?
a)
A_radial system
b)
B_ring system
c)
C_DC three wire system
d)
D_open loop system
e)
,
24.
The transformer oil used in transformers provide
a)
A_cooling and lubrication
b)
B_insulation and lubrication
c)
C_insulation and cooling
d)
D_insulation, cooling and lubrication
e)
,
25.
To protect the Δ-Δ power transformer against fault, the CT will have
a)
A_Δ-Δ connection
b)
B_Δ-Y connection
c)
C_Y-Δ connection
d)
D_Y-Y connection
e)
,
26.
For a detection of the occurrence of the severe synchronizing power surges
a)
A_impedance relays are best suited
b)
B_reactance relays are best suited
c)
C_MHO relays are best suited
d)
D_split-phase relays are best suited
e)
,
27.
If the capacitance of the transmission line is increased, the transmitted power will
a)
A_remain same
b)
B_increase
c)
C_decrease
d)
D_tend to zero at the receiving end
e)
,
28.
Which of the following tests are conducted for transformer oil?I. dielectricII interfacial tensionIII. color of oilIV. neutralization numberV. power factorVI. specific gravity
a)
A_I, II, III and IV
b)
B_I, II, III and V
c)
C_II, III, IV and V
d)
D_I, II, V and VI
e)
,
29.
Peak load plants are designed to supply power at
a)
A_low capital cost and low operating cost
b)
B_high capital cost and low operating cost
c)
C_low capital cost and high operating cost
d)
D_high capital cost and high operating cost
e)
,
30.
Which is not a standard distribution voltage in the Philippines?
a)
A_13.2 kV
b)
B_13.8 kV
c)
C_34.5 kV
d)
D_69 kV
e)
,
31.
What is the maximum number of conductors in a raceway that does not need to be derated?
a)
A_2
b)
B_3
c)
C_4
d)
D_5
e)
,
32.
When peace and order problem exist, National Grid Corporation of the Philippines (NGCP) issues
a)
A_security alert
b)
B_imminent danger alert
c)
C_decrease in length
d)
D_none of these
e)
,
33.
Which increases the resistance of a conductor?
a)
A_increase in size
b)
B_increase in length
c)
C_decrease in length
d)
D_none of these
e)
,
34.
A type of electronics communication in which only one party transmits at a time.
a)
A_Full duplex
b)
B_Half duplex
c)
C_Bicom
d)
D_Simplex
e)
,
35.
21 is the device function number for this relay.
a)
A_Undervoltage relay
b)
B_Overvoltage relay
c)
C_Distance relay
d)
D_Directional power relay
e)
,
36.
AC system has the following disadvantages over DC system.
a)
A_skin effect exist
b)
B_line regulation is more
c)
C_charging current exist
d)
D_proximity effect exist
e)
,
37.
RA 7832 concerns on _______
a)
A_pilferage of electricity, theft of transmission materials and capping of system loss
b)
B_pilferage of electricity, theft of transmission materials and rationalizing of system loss
c)
C_pilferage of electrical energy
d)
D_pilferage of electricity and electrical materials
e)
,
38.
PDC in EPIRA means
a)
A_Philippine Distribution Company
b)
B_Philippine Distribution Corporation
c)
C_Philippine Distribution Commission
d)
D_Philippine Distribution Code
e)
,
39.
What device is used to measure the temperature of a motor winding while the motor is in operation?
a)
A_Seismic probe
b)
B_Resistance temperature detector
c)
C_Thermocouples
d)
D_Proximity probe
e)
,
40.
The amount of frequency deviation from the carrier center of frequency in an FM transmitter is proportional to the __________
a)
A_shape
b)
B_amplitude
c)
C_frequency
d)
D_phase
e)
,
41.
If the resistance in a series RC circuit is increased, the magnitude of the phase angle
a)
A_increases
b)
B_remains the same
c)
C_decreases
d)
D_changes in an indeterminate manner
e)
,
42.
Nuclear reactors generally employ
a)
A_fusion
b)
B_fission
c)
C_both fusion and fission
d)
D_none of these
e)
,
43.
Which of the following is not a factor in calculating the feeder conductor size?
a)
A_ambient temperature
b)
B_branch-circuit protection
c)
C_voltage drop
d)
D_demand factors
e)
,
44.
In the transformers
a)
A_high tension winding is used near the core
b)
B_high tension winding is used away from the core
c)
C_low tension winding is used near the core
d)
D_low tension winding is used away from the core
e)
,
45.
The curve representing Ohm’s law is
a)
A_a parabola
b)
B_linear
c)
C_a sine function
d)
D_a hyperbola
e)
,
46.
The overcurrent protective device is caused to operate by ______
a)
A_voltage surge
b)
B_current flow
c)
C_voltage drop
d)
D_impedance
e)
,
47.
Which of the following insulators will be selected for high voltage application?
a)
A_strain type
b)
B_disc type
c)
C_suspension type
d)
D_pin type
e)
,
48.
If the torque angle continuously increases, system will become
a)
A_stable
b)
B_unstable
c)
C_oscillatory stable
d)
D_asymptotic stable
e)
,
49.
The condition in Ohm’s Law is that
a)
A_ratio V/I should be constant
b)
B_current should be proportional to voltage
c)
C_the temperature should remain constant
d)
D_the temperature should vary
e)
,
50.
Which of the following shall be included in the calculation of the reliability standard indices of the distributor asset by the Philippine Distribution Code?
a)
A_Outages that occur on the secondary lines of the distribution system
b)
B_Planned outages where the customers have been notified at least three(3) days prior to the loss of power
c)
C_Outages that occur on the primary lines of the distribution system
d)
D_Outages that occur in the transmission line
e)
,
51.
A type of electronics communication in which only one party transmits at a time.
a)
A_Full duplex
b)
B_Half duplex
c)
C_Bicom
d)
D_Simplex
e)
,
52.
Base load plants are designed to supply power at
a)
A_low capital cost and low operating cost
b)
B_high capital cost and low operating cost
c)
C_low capital cost and high operating cost
d)
D_high capital cost and high operating cost
e)
,
53.
Peak load plants are designed to supply power at
a)
A_low capital cost and low operating cost
b)
B_high capital cost and low operating cost
c)
C_low capital cost and high operating cost
d)
D_high capital cost and high operating cost
e)
,
54.
If the effect of earth is taken into account, then the capacitance of line to ground
a)
A_decreases
b)
B_increases
c)
C_remains unchanged
d)
D_becomes infinite
e)
,
55.
The effective resistance of conductor is increased by
a)
A_skin effect
b)
B_proximity effect
c)
C_corona effect
d)
D_both (a) and (b)
e)
,
56.
A two terminal pair of network of a transmission line can be represented by a
a)
A_Л- network
b)
B_T-network
c)
C_either (A) or (B)
d)
D_tree network
e)
,
57.
In television system, channels 2 and 13 are classified as
a)
A_VHF
b)
B_UHF
c)
C_SHF
d)
D_EHF
e)
,
58.
Which of the following methods of generating electric power from the sea water is more advantageous?
a)
A_water power
b)
B_ocean power
c)
C_tidal power
d)
D_none of these
e)
,
59.
When installing two grounding electrodes, the minimum distance between them is
a)
A_1,800 mm
b)
B_2,000 mm
c)
C_1,500 mm
d)
D_2,400 mm
e)
,
60.
The current flowing in L and C at parallel resonance are
a)
A_zero
b)
B_equal
c)
C_infinite
d)
D_Difference
e)
,
61.
What does PEMC in EPIRA stands for
a)
A_Philippine Energy Market Corporation
b)
B_Private Energy Marketing Company
c)
C_Philippine Electricity Market Corporation
d)
D_Philippine Electrical Marketing Corporation
e)
,
62.
Open circuit test on transformer is conducted to determine
a)
A_hysteresis loss
b)
B_copper loss
c)
C_core loss
d)
D_eddy current loss
e)
,
63.
Which of the following power plant is a conventional source of energy?
a)
A_Solar energy
b)
B_Geothermal energy
c)
C_Coal energy
d)
D_Wind energy
e)
,
64.
PDC in EPIRA means
a)
A_Philippine Distribution Commission
b)
B_Philippine Distribution Code
c)
C_Philippine Distribution Corporation
d)
D_Philippine Distribution Company
e)
,
65.
What is the maximum plug and cord rating of a 30 A branch circuit?
a)
A_24 A
b)
B_30 A
c)
C_26 A
d)
D_28 A
e)
,
66.
Alternators installed in a hydro power station, are of
a)
A_low speed
b)
B_high speed
c)
C_medium speed
d)
D_very high speed
e)
,
67.
Which of the following is NOT INCLUDED in the Technical Performance Standards for Distribution and Supply set by the Philippine Distibution Code?
a)
A_Power Quality
b)
B_Reliability
c)
C_Collection Efficiency
d)
D_System Efficiency
e)
,
68.
Which plant takes the least time in starting from cold conditions to full load operation?
a)
A_Steam turbine power plant
b)
B_Hydro power plant
c)
C_Gas turbine power plant
d)
D_Nuclear power plant
e)
,
69.
To adjust the power of the alternator, adjust the ________
a)
A_power factor
b)
B_governor
c)
C_field current
d)
D_frequency
e)
,
70.
What is the purpose of reactor in short circuit?
a)
A_To open the line in short circuit
b)
B_To decrease the circuit resistance
c)
C_To lessen the current in short circuit
d)
D_To increase the current in short circuit
e)
,
71.
For constant transmission efficiency, voltage is increased n times, the size of the conductor would be _____
a)
A_reduced to (1/n) times of the original
b)
B_reduced to (1/n²) times of the original
c)
C_increased to n² times of the original
d)
D_increased to n times of the original
e)
,
72.
Copper loss of a transformer are determined by means of a/an _______ test
a)
A_open-circuit
b)
B_polarity
c)
C_short-circuit
d)
D_inductive-circuit
e)
,
73.
The power transmission capacity of the transmission is ________
a)
A_inversely proportional to the voltage
b)
B_directly proportional to the voltage
c)
C_proportional to the square of the voltage
d)
D_proportional to the cube of the voltage
e)
,
74.
The undervoltage relays are usually used for what protection of the electrical equipment?
a)
A_feeder protection
b)
B_motor protection
c)
C_transformer protection
d)
D_bus-bar protection
e)
,
75.
Which of the following type of fault used only the equivalent positive sequence impedance of the circuit in the short-circuit calculation?
a)
A_Line to Line
b)
B_Line to ground
c)
C_Double line to ground
d)
D_Three-phase fault
e)
,
76.
What device is used to measure the temperature of a motor winding while the motor is in operation?
a)
A_Seismic probe
b)
B_Resistance temperature detector
c)
C_Thermocouples
d)
D_Proximity probe
e)
,
77.
Which of the following is a primary disadvantage of FM over AM?
a)
A_Lower efficiency
b)
B_Noise susceptibility
c)
C_Higher cost and complexity
d)
D_Excessive use of spectrum space
e)
,
78.
Which of the following that the voltage regulation is one of the important factors consider in the electrical power design?
a)
A_generator
b)
B_transmission line
c)
C_feeder
d)
D_transformer
e)
,
79.
Which of the following principle will the operation of fiber-optic cable is based?
a)
A_dispersion
b)
B_refraction
c)
C_reflection
d)
D_absorption
e)
,
80.
When electronics build up pressure at one point, it is called _______
a)
A_ganging
b)
B_current flow
c)
C_impedance
d)
D_pressure filing
e)
,
81.
Which of the following type of fault used only the equivalent positive and negative sequence impedance of the circuit in the short-circuit calculation?
a)
A_Double line to ground
b)
B_Line to line
c)
C_Three-phase
d)
D_Line to ground
e)
,
82.
Based on the Philippine Distribution Code, all users of the distribution system must maintain a certain power factor at the connection point in order to maintain power quality in the system. What power factor should be maintained at the connection point?
a)
A_Not less than 65%
b)
B_Not less than 70%
c)
C_Not less than 85%
d)
D_Not less than 75%
e)
,
83.
Which of the following is NOT considered in the selection of surge arrester?
a)
A_Voltage rating
b)
B_Current rating
c)
C_Class of Arrester
d)
D_Insulation level
e)
,
84.
It is difficult to magnetize steel because of its
a)
A_high density
b)
B_high retentivity
c)
C_low permeability
d)
D_high permeability
e)
,
85.
Present day capacitors which have high capacitance in small size use a dielectric of
a)
A_paper
b)
B_rubber
c)
C_ceramic
d)
D_mylar
e)
,
86.
What kind of device is a diode?
a)
A_Bilateral
b)
B_Linear
c)
C_Unipolar
d)
D_Nonlinear
e)
,
87.
In a shunt generator the voltage builds up till constrained by
a)
A_speed limitation
b)
B_armature heating
c)
C_saturation of iron
d)
D_insulation restrictions
e)
,
88.
For proper parallel operation, ac polyphaser alternators must have the same
a)
A_speed
b)
B_kVA rating
c)
C_voltage rating
d)
D_excitation
e)
,
89.
The series field of a short-shunt compound dc generator is excited by ______ current
a)
A_shunt
b)
B_armature
c)
C_load
d)
D_external
e)
,
90.
For which of the following sinusoids, the rms value and mean value is the same?
a)
A_sine wave
b)
B_triangular wave
c)
C_square wave
d)
D_half wave rectified
e)
,
91.
The maximum efficiency of a half–wave rectifier is
a)
A_40.6%
b)
B_80.6%
c)
C_50%
d)
D_20.3%
e)
,
92.
10¹³ ergs/sec is equal to how many kW?
a)
A_1,000
b)
B_250
c)
C_100
d)
D_10
e)
,
93.
Ideal transformer assumptions do not include
a)
A_no leakage flux
b)
B_no saturation of force
c)
C_zero resistance of the winding
d)
D_zero reactance of the winding
e)
,
94.
Heating effect of current has an undesirable side effect in
a)
A_Electric oven
b)
B_immersion heater
c)
C_electric iron
d)
D_vacuum cleaner
e)
,
95.
When the sole purpose of an alternating current is to produce heat, the selection of conductor is based on _______ value of the current.
a)
A_average
b)
B_instantaneous
c)
C_root mean square
d)
D_peak
e)
,
96.
Which of the following is not included in the evaluation of the Technical Performance of a Distribution System according to Philippine Distribution Code (PDC)?
a)
A_Power Quality
b)
B_Reliability
c)
C_Collecting Efficiency
d)
D_System Efficiency
e)
,
97.
Which is not a characteristic of an ideal transformer?
a)
A_finite permeability
b)
B_infinite permeability
c)
C_no losses
d)
D_no leakage flux
e)
,
98.
The specific resistance ρ is defined as
a)
A_resistance of a conductor which has a length of 1 m and cross-section of 1 m² at 20°C
b)
B_resistance of any conductor at 25°C
c)
C_resistance of any conductor at 20°C
d)
D_resistance of a conductor which has a length of 1 m and cross-section of 1 cm² at 20°C
e)
,
99.
What is the IEEE device function number 50?
a)
A_AC time overcurrent relay
b)
B_Instantaneous overcurrent relay
c)
C_AC circuit breaker
d)
D_Differential protective relay
e)
,
100.
In long transmission line, at no-load, the receiving end voltage as compared to the sending end voltage isI. higherII. lowerIII. remains the same
a)
A_I only
b)
B_II only
c)
C_Either I or II
d)
D_III only
e)
,
101.
What determines the direction of force in a conductor?
a)
A_Lenz law
b)
B_Faraday's law
c)
C_Left hand rule
d)
D_Right hand rule
e)
,
102.
The study of illumination involves
a)
A_design of lighting system
b)
B_study of lighting and wiring system
c)
C_calculation of wiring sizes for various lighting fixtures
d)
D_study of photometry and its application
e)
,
103.
A distributor is designed from the point of view of
a)
A_voltage drop
b)
B_current carrying capacity
c)
C_voltage drop and current carrying capacity
d)
D_load capacity
e)
,
104.
Cellular phones operate in the frequency range of
a)
A_EHF
b)
B_VHF
c)
C_UHF
d)
D_SHF
e)
,
105.
Varmeter when paired with other devices measures _______ factor?
a)
A_diversity
b)
B_power
c)
C_load
d)
D_demand
e)
,
106.
The type of ac distribution system commonly used to supply both light and power is the
a)
A_open delta system
b)
B_three phase delta system
c)
C_three phase wye system with neutral wire
d)
D_three phase wye system without neutral wire
e)
,
107.
If an electrical network having one or more than one voltage source is transformed into equivalent electrical network with a single current source (which is the 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
a)
A_Thevenin’s theorem
b)
B_Norton's theorem
c)
C_Reciprocity theorem
d)
D_Superposition theorem
e)
,
108.
What governs the minimum safety requirement in the Philippines for distribution and grid?
a)
A_Philippine Electrical Safety Code
b)
B_Philippine Electrical Code
c)
C_Philippine Grid Code
d)
D_Philippine Distribution Code
e)
,
109.
Which is not a source of power?
a)
A_Thermocouple
b)
B_Fuel coil
c)
C_Photovoltaic cell
d)
D_Solar cell
e)
,
110.
When the frequency of a synchronous motor increases, what happens to its speed?
a)
A_decreases
b)
B_increases
c)
C_remains the same
d)
D_none of these
e)
,
111.
What instrument measures the insulation of a powerline?
a)
A_growler
b)
B_ohmmeter
c)
C_galvanometer
d)
D_megger
e)
,
112.
The law that induces emf and current always opposes the cause producing them was discovered by
a)
Faraday
b)
Maxwell
c)
Lenz
d)
Ohm
113.
What is the maximum number of bends permitted in rigid conduits between outlets?
a)
4 Quarter Bend
b)
6 Quarter Bend
c)
2 Quarter Bend
d)
3 Quarter Bend
114.
For two alternators operating in parallel, if the load shared by one of them is to be increased, as field excitation is
a)
A. to be strengthened keeping input torque the same
b)
B. to be weakened keeping input torque the same
c)
C. to be kept constant but input torque should be increased
d)
D. to be kept constant but input torque should be decreased
115.
In a synchronous motor, the magnitude of stator back emf depends on
a)
A. load on the motor
b)
B. dc excitation only
c)
C. both the speed and rotor flux
d)
D. none of theses
116.
What size of branch circuit is required for a window air conditioner with a nameplate rating of 8 A if the circuit also supplies other outlets?
a)
A. 17 A
b)
B. 25 A
c)
C. 20 A
d)
D. 15 A
117.
What is the equivalent IEEE device number for an under-voltage relay?
a)
A. 67
b)
B. 52
c)
C. 27
d)
D. 51
118.
In a transmission line of negligible resistance, the surge impedance will be _______.
a)
A. square root of LC
b)
B. square root of L/C
c)
C. square root of 1/LC
d)
D. square root of C/L
119.
Which of these is not a factor in the selection of fuse rating for protection of a branch circuit?
a)
A. Branch full-load current
b)
B. System impedance
c)
C. Branch fault-current
d)
D. System voltage
120.
When the voltage remains the same, the current will ______ as the impedance decreases. I. decrease II. Increase
a)
A. I only
b)
B. Both
c)
C. Either I or II
d)
D. II only
121.
Slip rings are made of
a)
A. steel
b)
B. copper
c)
C. bakelite
d)
D. mica
122.
The reciprocal of permeability is
a)
A. conductivity
b)
B. susceptibility
c)
C. reluctivity
d)
D. permittivity
123.
One KWHR is equal to _____ BTU
a)
A. 360
b)
B. 3,413
c)
C. 3,600
d)
D. 1,000
124.
What is the primary advantage of FM over AM?
a)
A. FM has a greater bandwidth than AM
b)
B. noise immunity
c)
C. more complex
d)
D. greater capture effect
125.
The phase angle for a series RC circuit may be computed as the angle between the ______ and ______ phasors.
a)
A. resistance, impedance
b)
B. resistance, reactance
c)
C. resistance, capacitance
d)
D. impedance, reactance
126.
It is defined as the total number of sustained Customer power interruption within a given period divided by the total number of Customers served within the same period.
a)
A. System Average Interruption Frequency Index
b)
B. System Average Interruption Duration Index
c)
C. Customer Average Interruption Frequency Index
d)
D. Customer Average Interruption Duration Index
127.
The impedance triangle is similar to the _______ triangle with the resistance phasor in place of the _______.
a)
A. Current, resistor current
b)
B. Current, resistor voltage
c)
C. voltage, impedance
d)
D. voltage, resistor voltage
128.
What determines the direction of force in a conductor?
a)
A. Lenz law
b)
B. Faraday's law
c)
C. Left hand rule
d)
D. Right hand rule
129.
When a power plant is not able to meet the demand of consumers it will resort to
a)
A. load shedding
b)
B. efficiency plant operation
c)
C. power factor improvement at the generators
d)
D. penalizing high load consumers by increasing the charges of electricity
130.
Conservator of a transformer consists of
a)
A. an air-tight metal drum fixed at the top of the tank
b)
B. drum placed at the bottom of the tank
c)
C. overload protection
d)
D. none of these
131.
Which is the most reliable power plant?
a)
A. Steam
b)
B. Hydro
c)
C. Wind
d)
D. Tidal
132.
In a diode modulator, what supplies the negative halfwave?
a)
A. Inductor
b)
B. Capacitor
c)
C. Resistor
d)
D. Tuned Circuit
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