Question
81
Analog input PLC digunakan untuk...
PID tuning means...
Options
a
Menerima sinyal kontinu seperti 4–20 mA atau 0–10 V
Setting Kp, Ki, and Kd so that the system response meets operational requirements
b
Menggerakkan motor tiga fasa langsung
Replacing all sensors
c
Menghasilkan tekanan pneumatik
Converting AC signals into DC
d
Menggantikan circuit breaker
Reducing the number of controllers
Grade
Ungraded
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Question
82
Digital output PLC dapat digunakan untuk...
The objective of good PID tuning is to achieve...
Options
a
Mengaktifkan relay, contactor, atau solenoid
A fast and stable response with acceptable error and overshoot
b
Membaca temperatur RTD secara langsung tanpa modul
Continuous system oscillation
c
Mengukur tekanan fluida
Increased noise
d
Mengukur putaran poros
Removal of all protective functions
Grade
Ungraded
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Question
83
Analog output PLC dapat digunakan untuk...
Rise time is...
Options
a
Memberikan perintah kontinu ke control valve atau VFD
The time required for the output to rise toward the target value
b
Membaca limit switch
The time when the system is completely shut down
c
Mengukur level tangki
The time required to replace a sensor
d
Menghasilkan tenaga mekanik
The battery charging time
Grade
Ungraded
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Question
84
Interlock pada sistem kontrol digunakan untuk...
Settling time is...
Options
a
Mencegah operasi yang tidak aman atau urutan yang salah
The time required for the output to settle within an acceptable range around the target value
b
Menambah error proses
The time required to open a panel
c
Menghilangkan semua alarm
The oil replacement interval
d
Meningkatkan disturbance
The emergency generator starting time
Grade
Ungraded
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Question
85
Permissive dalam sistem kontrol adalah...
A stable system after a disturbance will...
Options
a
Kondisi yang harus terpenuhi sebelum suatu peralatan diizinkan beroperasi
Return toward a controlled operating condition
b
Alarm yang selalu menyebabkan blackout
Continue to deviate without limit
c
Sinyal sensor yang tidak digunakan
Remove all signals
d
Perintah untuk menghapus set point
Always shut down the actuator
Grade
Ungraded
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Question
86
Trip pada sistem kontrol berarti...
In analog control, the 4–20 mA signal is widely used because it...
Options
a
Perintah menghentikan peralatan karena kondisi berbahaya
Can continuously represent a process variable and is suitable for transmission
b
Perintah menaikkan set point
Has only two states, 0 and 1
c
Kalibrasi otomatis sensor
Requires no power source
d
Penggantian controller
Cannot be used with transmitters
Grade
Ungraded
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Question
87
Alarm berbeda dari trip karena alarm...
An advantage of using 4 mA rather than 0 mA as the lower range value is that it...
Options
a
Memberikan peringatan, sedangkan trip dapat menghentikan peralatan
Helps distinguish a zero process value from an open-circuit condition
b
Selalu menghentikan plant
Makes the signal digital
c
Tidak memerlukan sensor
Eliminates the need for a transmitter
d
Hanya digunakan pada open loop
Increases the system voltage
Grade
Ungraded
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Question
88
Deadband pada sistem kontrol adalah...
An ADC is required in a digital control system when...
Options
a
Rentang kecil di mana perubahan input tidak langsung menghasilkan aksi output
An analog sensor signal must be read by a digital controller
b
Nilai maksimum controller
A digital signal must directly operate a pneumatic valve
c
Waktu start generator
A motor must be turned manually
d
Jumlah disturbance
The system has no sensor
Grade
Ungraded
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Question
89
Tujuan deadband adalah...
A DAC is required when...
Options
a
Mencegah actuator terlalu sering bergerak akibat perubahan kecil atau noise
A digital controller must provide an analog output signal to certain field devices
b
Meningkatkan osilasi
An analog sensor must become digital
c
Menghilangkan feedback
A generator must be synchronized
d
Membuat sensor kurang akurat
An open-loop system must be changed to manual
Grade
Ungraded
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Question
90
Fail-safe pada actuator berarti...
Sampling in digital control is...
Options
a
Actuator bergerak ke posisi aman ketika supply atau sinyal kontrol gagal
The process of taking signal values at specified time intervals
b
Actuator selalu membuka penuh
The process of increasing sensor size
c
Controller berhenti membaca sensor
The process of replacing a controller
d
Plant selalu tetap beroperasi
The process of deleting data
Grade
Ungraded
Last Update
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