Question
2401
Apa fungsi ventilasi udara pada titik tertinggi sistem pendingin air tawar?
What is the function of the air vent at the highest point of the fresh water cooling system?
Options
a
Membuang udara terperangkap agar sirkulasi pendingin tetap lancar
To release trapped air so that coolant circulation remains smooth
b
Menambah tekanan bahan bakar ke injector
To increase fuel pressure to the injector
c
Mendinginkan gas buang sebelum turbocharger
To cool exhaust gas before the turbocharger
d
Memisahkan lumpur dari air laut
To separate sludge from seawater
Grade
Ungraded
Last Update
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Question
2402
Mengapa pendinginan piston perlu dipantau dengan cermat?
Why must piston cooling be monitored carefully?
Options
a
Karena kegagalan pendinginan piston dapat menyebabkan overheat dan kerusakan serius
Because piston cooling failure can cause overheating and serious damage
b
Karena pendinginan piston menentukan arah putaran mesin
Because piston cooling determines the direction of rotation
c
Karena pendinginan piston mempengaruhi kerja kompas giro
Because piston cooling affects the operation of the gyro compass
d
Karena pendinginan piston hanya diperlukan saat kapal sandar
Because piston cooling is only needed when the ship is berthed
Grade
Ungraded
Last Update
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Question
2403
Apa fungsi utama minyak lumas pada mesin diesel kapal?
What is the main function of lubricating oil in a marine diesel engine?
Options
a
Mengurangi gesekan dan keausan antarpermukaan yang bergerak
To reduce friction and wear between moving surfaces
b
Menaikkan kadar oksigen di ruang bakar
To increase oxygen content in the combustion space
c
Menambah tekanan udara start
To increase starting air pressure
d
Menggantikan fungsi air pendingin
To replace the function of cooling water
Grade
Ungraded
Last Update
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Question
2404
Apa fungsi lube oil cooler?
What is the function of the lube oil cooler?
Options
a
Menurunkan temperatur minyak lumas agar viskositas dan daya lumas terjaga
To reduce lubricating oil temperature so that viscosity and lubricating ability are maintained
b
Memanaskan minyak lumas sebelum masuk bearing
To heat lubricating oil before it enters the bearing
c
Membuang air dari bahan bakar berat
To remove water from heavy fuel oil
d
Menaikkan tekanan di crankcase
To increase pressure in the crankcase
Grade
Ungraded
Last Update
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Question
2405
Apa fungsi purifier minyak lumas?
What is the function of the lubricating oil purifier?
Options
a
Memisahkan air dan kotoran dari minyak lumas
To separate water and impurities from the lubricating oil
b
Mencampur minyak lumas dengan bahan bakar
To mix lubricating oil with fuel
c
Menaikkan tekanan minyak lumas ke turbocharger
To increase lubricating oil pressure to the turbocharger
d
Mendinginkan minyak lumas dengan udara
To cool lubricating oil with air
Grade
Ungraded
Last Update
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Question
2406
Apa fungsi sump tank atau crankcase oil sump?
What is the function of the sump tank or crankcase oil sump?
Options
a
Menampung minyak lumas yang kembali dari sistem sebelum disirkulasikan lagi
To collect lubricating oil returning from the system before it is recirculated
b
Menampung air pendingin dari jacket silinder
To collect cooling water from the cylinder jacket
c
Menampung bahan bakar siap pakai untuk mesin bantu
To store ready-to-use fuel for the auxiliary engine
d
Menampung udara buang dari turbocharger
To collect exhaust air from the turbocharger
Grade
Ungraded
Last Update
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Question
2407
Apa akibat utama tekanan minyak lumas terlalu rendah saat mesin beroperasi?
What is the main effect if lubricating oil pressure is too low while the engine is operating?
Options
a
Bantalan dan komponen bergerak dapat cepat rusak karena pelumasan tidak cukup
Bearings and moving components may be quickly damaged due to insufficient lubrication
b
Bahan bakar menjadi terlalu panas
The fuel becomes too hot
c
Udara start menjadi terlalu lembap
The starting air becomes too damp
d
Air bilga tidak dapat dipisahkan
Bilge water cannot be separated
Grade
Ungraded
Last Update
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Question
2408
Apa fungsi relief valve pada sistem pelumasan?
What is the function of the relief valve in the lubrication system?
Options
a
Membatasi tekanan berlebih dan melindungi komponen sistem
To limit excessive pressure and protect system components
b
Menurunkan temperatur minyak lumas di cooler
To reduce lubricating oil temperature in the cooler
c
Menambah debit minyak lumas ke injector
To increase lubricating oil flow to the injector
d
Mengarahkan gas buang ke economizer
To direct exhaust gas to the economizer
Grade
Ungraded
Last Update
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Question
2409
Mengapa pre-lubrication dilakukan sebelum mesin di-start?
Why is pre-lubrication carried out before the engine is started?
Options
a
Agar permukaan gesek telah mendapat lapisan minyak sebelum berputar
So that friction surfaces have an oil film before rotating
b
Agar bahan bakar langsung menyala tanpa kompresi
So that the fuel ignites immediately without compression
c
Agar air pendingin tidak perlu dipompa
So that cooling water does not need to be pumped
d
Agar udara start dapat disimpan lebih lama
So that starting air can be stored longer
Grade
Ungraded
Last Update
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Question
2410
Apa keuntungan penggunaan duplex filter pada sistem pelumasan?
What is the advantage of using a duplex filter in the lubrication system?
Options
a
Pembersihan atau penggantian elemen dapat dilakukan tanpa menghentikan aliran minyak
Cleaning or replacing the element can be done without stopping the oil flow
b
Tekanan minyak selalu naik dua kali lipat
Oil pressure always doubles
c
Minyak lumas dapat dipakai tanpa pendinginan
Lubricating oil can be used without cooling
d
Filter dapat digunakan sebagai purifier cadangan
The filter can be used as a standby purifier
Grade
Ungraded
Last Update
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