Question
2231
Apa fungsi feed check valve pada boiler?
What is the function of the feed check valve on a boiler?
Options
a
Mencegah aliran balik dari boiler ke pipa air umpan
To prevent backflow from the boiler to the feed water line
b
Meningkatkan tekanan udara pembakaran
To increase combustion air pressure
c
Mengatur bukaan burner secara manual
To regulate burner opening manually
d
Mendinginkan uap utama sebelum masuk turbin
To cool the main steam before it enters the turbine
Grade
Ungraded
Last Update
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Question
2232
Apa indikasi umum jika terjadi carry-over pada boiler?
What is a common indication if carry-over occurs in a boiler?
Options
a
Uap menjadi basah dan air terbawa ke jalur uap
The steam becomes wet and water is carried into the steam line
b
Tekanan bahan bakar turun drastis
Fuel pressure drops drastically
c
Draft fan berputar terlalu cepat
The draft fan rotates too fast
d
Warna api menjadi selalu biru terang
The flame color always becomes bright blue
Grade
Ungraded
Last Update
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Question
2233
Mengapa kadar garam air boiler harus dikendalikan?
Why must the salt content of boiler water be controlled?
Options
a
Untuk mencegah foaming, carry-over, dan korosi
To prevent foaming, carry-over, and corrosion
b
Untuk menaikkan titik nyala bahan bakar
To increase the flash point of the fuel
c
Untuk memperbesar pembukaan safety valve
To widen the opening of the safety valve
d
Untuk menurunkan konsumsi listrik pompa
To reduce pump electrical consumption
Grade
Ungraded
Last Update
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Question
2234
Apa fungsi economizer pada sistem boiler kapal?
What is the function of the economizer in a shipboard boiler system?
Options
a
Memanfaatkan panas gas buang untuk memanaskan air umpan
To use exhaust gas heat to warm the feed water
b
Mendinginkan bahan bakar sebelum pembakaran
To cool the fuel before combustion
c
Mengurangi tekanan uap utama
To reduce main steam pressure
d
Menyimpan uap cadangan untuk keadaan darurat
To store reserve steam for emergencies
Grade
Ungraded
Last Update
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Question
2235
Mengapa tekanan ruang bakar tidak boleh terlalu positif?
Why must furnace pressure not be too positive?
Options
a
Karena gas panas dapat keluar dan menimbulkan bahaya kebakaran
Because hot gases may escape and create a fire hazard
b
Karena level air drum akan langsung naik
Because the drum water level will rise immediately
c
Karena air umpan akan berhenti mengalir
Because the feed water flow will stop
d
Karena turbin uap akan berputar terbalik
Because the steam turbine will rotate in reverse
Grade
Ungraded
Last Update
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Question
2236
Apa tujuan soot blowing pada boiler pipa air?
What is the purpose of soot blowing on a water-tube boiler?
Options
a
Membersihkan jelaga pada permukaan pemanas agar perpindahan panas tetap baik
To clean soot from heating surfaces so that heat transfer remains efficient
b
Menaikkan salinitas air boiler
To increase boiler water salinity
c
Menambah tekanan bahan bakar ke burner
To increase fuel pressure to the burner
d
Mengurangi level air drum
To reduce the drum water level
Grade
Ungraded
Last Update
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Question
2237
Apa akibat jika forced draft fan gagal saat boiler beroperasi?
What happens if the forced draft fan fails while the boiler is operating?
Options
a
Suplai udara pembakaran terganggu dan boiler dapat trip
The combustion air supply is disturbed and the boiler may trip
b
Tekanan uap utama langsung naik
The main steam pressure rises immediately
c
Air umpan akan mendidih di luar drum
Feed water will boil outside the drum
d
Kadar oksigen di air boiler bertambah
The oxygen content in the boiler water increases
Grade
Ungraded
Last Update
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Question
2238
Mengapa perubahan beban boiler harus dilakukan bertahap?
Why must boiler load changes be carried out gradually?
Options
a
Untuk mencegah tegangan termal dan gangguan kestabilan level air
To prevent thermal stress and disturbance to water level stability
b
Untuk mempercepat pembentukan kerak
To accelerate scale formation
c
Untuk menurunkan kerja pengontrol otomatis
To reduce the work of the automatic controller
d
Untuk mengurangi kebutuhan pengamatan operator
To reduce the need for operator monitoring
Grade
Ungraded
Last Update
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Question
2239
Apa fungsi low water level cut-out?
What is the function of the low water level cut-out?
Options
a
Menghentikan pembakaran sebelum permukaan pemanas terbuka
To stop combustion before the heating surfaces are exposed
b
Membuka safety valve saat tekanan rendah
To open the safety valve at low pressure
c
Menaikkan tekanan air umpan ke maksimum
To raise feed water pressure to the maximum
d
Mengalihkan boiler ke mode manual
To switch the boiler to manual mode
Grade
Ungraded
Last Update
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Question
2240
Mengapa burner management system penting pada boiler?
Why is the burner management system important on a boiler?
Options
a
Karena sistem ini mengatur urutan start, interlock, dan shutdown dengan aman
Because it controls the start sequence, interlocks, and shutdown safely
b
Karena sistem ini menggantikan fungsi economizer
Because it replaces the function of the economizer
c
Karena sistem ini menaikkan tekanan uap secara mekanis
Because it raises steam pressure mechanically
d
Karena sistem ini mengatur haluan pelayaran
Because it controls the ship’s course
Grade
Ungraded
Last Update
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