問題一覧
1
a live room is one whose interior finish is such that reverberation of sound in second is
less than 1
2
What is the electric state of a body that contains equal number of protons and electrons in its atom
static
3
A live room is one whose interior finish is such that reverberation of sound in seconds is
less than 1
4
Which is not 180 ° apart
Xl and Ic
5
Which is not found in a rapid start fluorescent lamp
starter
6
What replaces coaxial cable for terrestrial transmission
print to print wireless transmission
7
In a purely resistive ac circuit the angle between the voltage and the current is zero degree.This combination is called
in phase
8
What is code name or type of PVC insulation that is thermoplastic heat and water resistant with temperatures rating of 75° celsius
nichrome
9
The current in armature conductors of a dc machine is
ac
10
The integrated circuit was invented at Texas instrument in 1958 by
Jack Kilby
11
When a V-V system is converted into delta-delta system increase in the capacity of the system is__%
73.2
12
The capacitor in a capacitor start induction run ac motor is connected in series with
starting
13
What is the basis of considering counterclockwise as positive direction of rotation for polyphase system of vector
convention
14
Which is not correct in wye connected transformer
power cable can tolerate 100% insulation level
15
Dielectric heating is based on the principle of
capacitance
16
For proper parallel operation ac polyphase alternators must have the same
voltage rating
17
One ampere hour charge delivered by a secondary cell is equal to __coulomb
3600
18
Fixtures that transmit 60% to 90% of the light downward are classified as
semidirect
19
What is the normal secondary circuit current of a current transformer
5A
20
In a stranded conductor what do you call the strand at the center of the conductor
center wire
21
What electrode in a junction transistor corresponds to the cathode in a vacuum tube
emitter
22
Which does not belong?
flux
23
A pure semiconductor without doping is called:
intrinsic
24
An SCR combines the features of
a rectifier and transistor
25
Assuming the most efficient technologies for the extraction of energy, the fuel with the largest known reserve is
nuclear
26
Name of the transformer that provides an almost continuously variable stepless output voltage from 0 to rated line voltage
variac
27
The most common type of conductor used for overhead transmission lines consisting of electrical grade aluminum conductor overlaying strands of high carbon galvanized steel is called
acsr
28
What is the process of heating electrically non metallic materials such as plumber plasticd
dielectric
29
How are multiple stop push buttons connected in a controlled circuit
series
30
Shunts are generally made of what material
manganin
31
What are the three colors which when mixed equally together will produce white and the combination of any two will produce different colors and intensities
red blue green
32
A 500 kv transmission line is categorized as
extra high voltage
33
An antenna that transmits or deceives equally well in all direction is said to be
omnidirectional
34
A type of communication that uses light rather than electricity to communicate is called
fiber optic
35
An instrument transformers are used in indicating and metering with protective devices they are used for
relaying
36
What is the equivalent of the collector terminal of transistor in a FET
drain
37
What is the present sleep of the synchronous motor when running
0
38
It refers to a device that merely boost a signal and passes it on
repeater
39
What do you call an impedance that when a line to ground fault occurs a produces fault currents that are equal and in the phase
zero sequence
40
What is the unit of electrical resistance
ohm
41
What category do 115kV-230kV belong
high voltage
42
What is the most common cause of failure in cable termination and splicing
wrong clearance
43
What is the device that converts dc power to ac
inverter
44
Three of the following terms in magnetic induction are identical which is distinct among the following
gauss
45
1 KWHR is equal to
860 kcalories
46
When lumineers direct 90 to 100% of their output downward is considered
direct lighting
47
In hydroelectric power plant it is used to prevent the sudden rise and drop of water pressure
surge tank
48
How is the storage battery rated in capacity
ampere-hour
49
The basis where the flow of current is from positive to negative was derived from
convention
50
The fault current that exist immediately after the fault is known as
sub-transient current
51
An SCR three leads are the
anode cathode and gate
52
Its primary function is to provide ground source
zigzag transformer
53
A synchronous motor that is used for power factor correction only
synchronous condenser
54
Why are transmission towers sometimes constructed in lattice type and sometimes in full type although they have the same capacity and voltage rating
right of way
55
With the primary of CT energized the secondary must never be made open to prevent this to happen
build up of magnetic bias
56
Charges that are both positively and negatively charged are called
positron
57
The positive sequence components of the system has
the same phase sequence as the original
58
Pilot lamp in a mcc indicates a
normal condition of the load
59
These are high intensity discharge lamps which are usually installed in outdoor and wide areas and are mounted on poles whereas for indoors these are used for high ceiling application
high bay
60
This is an electrically operated switch which is rated in amperes and also used in overload protection of motors
magnetic contactor
61
What do you call an insulated conductor that can be used only up to 300 volts and is also considered having no insulation based on general rating
enameled conductor
62
A limits which is used to shut off the power when ___ a definite limit
the travels reaches
63
Rapid stopping of an electric motor by momentarily reversing its connection to the supply is called
plugging
64
An induction motor driven above synchronous speed is called
induction generator
65
The auxiliary winding of a split phase induction motor is which out of the circuit by a device called
centrifugal switch
66
This is a device protected vertically upward above structures to serve as the lighting rod
air terminal
67
Presence of ozone as a result of corona is harmful because
corrodes the material
68
A distributor is designed from the point of view of
voltage drop
69
The luminous intensity is defined as
luminous flux per unit solid angle
70
MHO relay is used for
transmission line
71
In circuit breaker the time duration from the instant of fall to the instant of energizing of the trip coil is known as
protection time
72
In transformer the purpose of the breather is to
extract moisture of the air
73
The maximum power developed in a synchronous motor occurs at a coupling angle of
90
74
It is also known as the polar graph of intensities of illumination
photometric distribution
75
In a series motor what is the relation of the connection of motor field winding with respect to the motor armature
series
76
What is the minimum number of magnetic contactor to allowed forward reverse control in a rotation of a motor
2
77
What is the common unit of sound absorption coefficient
sabine
78
Yl what is the short circuit temperature rating of a cross link polyethylene cable in degrees celsius
250
79
What is the element of transmission line that supports the cable at the bottom of the suspension insulator
strained clamp
80
What type of transformer bank is used to convert two phase to three phase power
scott-t
81
Given the number of poles and frequency of a motor what is its speed
120f/p
82
In a wound rotor induction motor where do you connect the voltage limiting device for reduce voltage starting
stator
83
In 1885 who invented antenna for long distance transmission of electromagnetic waves
Guglielmo marconi
84
What device is used to change the settling of secondary nominal voltage
tap changer
85
In residential electrical supply is composed of one phase 240v 3 wire system what is the purpose of the third wire
grounding
86
As the load is increased the speed of decision motor
reduce slightly
87
In the left hand rule thumb always represents
direction of force and conductor
88
Which of the following is the least efficient power plant
gasoline engine set
89
The cd rom is drive is connected to ___of the computer motherboard
IDE slot
90
Which of the following devices will receive voltage surge first when traveling on the transmission line
lightning arrester
91
Directional relays are based on flow of
power
92
Which of the following equipment is used to limit short circuit current level in substation
series reactor
93
Which of the following carries the most number of channels
1 fiber optic
94
1 watt is equal to
10⁷ ergs/sec
95
A space station with communication equipment that synchronizes with the earth's orbit
satelite
96
a relay that opens the circuit breaker upon sensing overload
overcurrent relay
97
Infusion energy is produced when
nuclear particles combine
98
1 KW is equal to
1.34
99
It is unconventional unit of mmf in the cgs system
gilberts
100
Split phase induction motor is defective but if the motor is energies in the motor is rotated by the hand the motor runs what is wrong with the motor
capacitor is defective
ELECTRICAL 1
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100問 • 1年前問題一覧
1
a live room is one whose interior finish is such that reverberation of sound in second is
less than 1
2
What is the electric state of a body that contains equal number of protons and electrons in its atom
static
3
A live room is one whose interior finish is such that reverberation of sound in seconds is
less than 1
4
Which is not 180 ° apart
Xl and Ic
5
Which is not found in a rapid start fluorescent lamp
starter
6
What replaces coaxial cable for terrestrial transmission
print to print wireless transmission
7
In a purely resistive ac circuit the angle between the voltage and the current is zero degree.This combination is called
in phase
8
What is code name or type of PVC insulation that is thermoplastic heat and water resistant with temperatures rating of 75° celsius
nichrome
9
The current in armature conductors of a dc machine is
ac
10
The integrated circuit was invented at Texas instrument in 1958 by
Jack Kilby
11
When a V-V system is converted into delta-delta system increase in the capacity of the system is__%
73.2
12
The capacitor in a capacitor start induction run ac motor is connected in series with
starting
13
What is the basis of considering counterclockwise as positive direction of rotation for polyphase system of vector
convention
14
Which is not correct in wye connected transformer
power cable can tolerate 100% insulation level
15
Dielectric heating is based on the principle of
capacitance
16
For proper parallel operation ac polyphase alternators must have the same
voltage rating
17
One ampere hour charge delivered by a secondary cell is equal to __coulomb
3600
18
Fixtures that transmit 60% to 90% of the light downward are classified as
semidirect
19
What is the normal secondary circuit current of a current transformer
5A
20
In a stranded conductor what do you call the strand at the center of the conductor
center wire
21
What electrode in a junction transistor corresponds to the cathode in a vacuum tube
emitter
22
Which does not belong?
flux
23
A pure semiconductor without doping is called:
intrinsic
24
An SCR combines the features of
a rectifier and transistor
25
Assuming the most efficient technologies for the extraction of energy, the fuel with the largest known reserve is
nuclear
26
Name of the transformer that provides an almost continuously variable stepless output voltage from 0 to rated line voltage
variac
27
The most common type of conductor used for overhead transmission lines consisting of electrical grade aluminum conductor overlaying strands of high carbon galvanized steel is called
acsr
28
What is the process of heating electrically non metallic materials such as plumber plasticd
dielectric
29
How are multiple stop push buttons connected in a controlled circuit
series
30
Shunts are generally made of what material
manganin
31
What are the three colors which when mixed equally together will produce white and the combination of any two will produce different colors and intensities
red blue green
32
A 500 kv transmission line is categorized as
extra high voltage
33
An antenna that transmits or deceives equally well in all direction is said to be
omnidirectional
34
A type of communication that uses light rather than electricity to communicate is called
fiber optic
35
An instrument transformers are used in indicating and metering with protective devices they are used for
relaying
36
What is the equivalent of the collector terminal of transistor in a FET
drain
37
What is the present sleep of the synchronous motor when running
0
38
It refers to a device that merely boost a signal and passes it on
repeater
39
What do you call an impedance that when a line to ground fault occurs a produces fault currents that are equal and in the phase
zero sequence
40
What is the unit of electrical resistance
ohm
41
What category do 115kV-230kV belong
high voltage
42
What is the most common cause of failure in cable termination and splicing
wrong clearance
43
What is the device that converts dc power to ac
inverter
44
Three of the following terms in magnetic induction are identical which is distinct among the following
gauss
45
1 KWHR is equal to
860 kcalories
46
When lumineers direct 90 to 100% of their output downward is considered
direct lighting
47
In hydroelectric power plant it is used to prevent the sudden rise and drop of water pressure
surge tank
48
How is the storage battery rated in capacity
ampere-hour
49
The basis where the flow of current is from positive to negative was derived from
convention
50
The fault current that exist immediately after the fault is known as
sub-transient current
51
An SCR three leads are the
anode cathode and gate
52
Its primary function is to provide ground source
zigzag transformer
53
A synchronous motor that is used for power factor correction only
synchronous condenser
54
Why are transmission towers sometimes constructed in lattice type and sometimes in full type although they have the same capacity and voltage rating
right of way
55
With the primary of CT energized the secondary must never be made open to prevent this to happen
build up of magnetic bias
56
Charges that are both positively and negatively charged are called
positron
57
The positive sequence components of the system has
the same phase sequence as the original
58
Pilot lamp in a mcc indicates a
normal condition of the load
59
These are high intensity discharge lamps which are usually installed in outdoor and wide areas and are mounted on poles whereas for indoors these are used for high ceiling application
high bay
60
This is an electrically operated switch which is rated in amperes and also used in overload protection of motors
magnetic contactor
61
What do you call an insulated conductor that can be used only up to 300 volts and is also considered having no insulation based on general rating
enameled conductor
62
A limits which is used to shut off the power when ___ a definite limit
the travels reaches
63
Rapid stopping of an electric motor by momentarily reversing its connection to the supply is called
plugging
64
An induction motor driven above synchronous speed is called
induction generator
65
The auxiliary winding of a split phase induction motor is which out of the circuit by a device called
centrifugal switch
66
This is a device protected vertically upward above structures to serve as the lighting rod
air terminal
67
Presence of ozone as a result of corona is harmful because
corrodes the material
68
A distributor is designed from the point of view of
voltage drop
69
The luminous intensity is defined as
luminous flux per unit solid angle
70
MHO relay is used for
transmission line
71
In circuit breaker the time duration from the instant of fall to the instant of energizing of the trip coil is known as
protection time
72
In transformer the purpose of the breather is to
extract moisture of the air
73
The maximum power developed in a synchronous motor occurs at a coupling angle of
90
74
It is also known as the polar graph of intensities of illumination
photometric distribution
75
In a series motor what is the relation of the connection of motor field winding with respect to the motor armature
series
76
What is the minimum number of magnetic contactor to allowed forward reverse control in a rotation of a motor
2
77
What is the common unit of sound absorption coefficient
sabine
78
Yl what is the short circuit temperature rating of a cross link polyethylene cable in degrees celsius
250
79
What is the element of transmission line that supports the cable at the bottom of the suspension insulator
strained clamp
80
What type of transformer bank is used to convert two phase to three phase power
scott-t
81
Given the number of poles and frequency of a motor what is its speed
120f/p
82
In a wound rotor induction motor where do you connect the voltage limiting device for reduce voltage starting
stator
83
In 1885 who invented antenna for long distance transmission of electromagnetic waves
Guglielmo marconi
84
What device is used to change the settling of secondary nominal voltage
tap changer
85
In residential electrical supply is composed of one phase 240v 3 wire system what is the purpose of the third wire
grounding
86
As the load is increased the speed of decision motor
reduce slightly
87
In the left hand rule thumb always represents
direction of force and conductor
88
Which of the following is the least efficient power plant
gasoline engine set
89
The cd rom is drive is connected to ___of the computer motherboard
IDE slot
90
Which of the following devices will receive voltage surge first when traveling on the transmission line
lightning arrester
91
Directional relays are based on flow of
power
92
Which of the following equipment is used to limit short circuit current level in substation
series reactor
93
Which of the following carries the most number of channels
1 fiber optic
94
1 watt is equal to
10⁷ ergs/sec
95
A space station with communication equipment that synchronizes with the earth's orbit
satelite
96
a relay that opens the circuit breaker upon sensing overload
overcurrent relay
97
Infusion energy is produced when
nuclear particles combine
98
1 KW is equal to
1.34
99
It is unconventional unit of mmf in the cgs system
gilberts
100
Split phase induction motor is defective but if the motor is energies in the motor is rotated by the hand the motor runs what is wrong with the motor
capacitor is defective