Question
81
Apa fungsi scavenge air cooler atau charge air cooler?
What is the function of the scavenge air cooler or charge air cooler?
Options
a
Mendinginkan udara tekan dari turbocharger agar densitas udara meningkat
To cool the compressed air from the turbocharger so that air density increases
b
Memanaskan udara bilas agar pembakaran lebih lambat
To heat the scavenge air so that combustion slows down
c
Memisahkan minyak lumas dari udara bilas
To separate lubricating oil from scavenge air
d
Menampung kondensat dari tabung udara start
To collect condensate from the starting air receiver
Grade
Easy
Last Update
06 Aug 2026 11:29
By Gabriel
Question
82
Energi apa yang dimanfaatkan turbocharger untuk memutar turbin?
What energy does the turbocharger use to rotate the turbine?
Options
a
Energi gas buang
Exhaust gas energy
b
Energi minyak lumas
Lubricating oil energy
c
Energi air pendingin
Cooling water energy
d
Energi listrik dari generator darurat
Electrical energy from the emergency generator
Grade
Easy
Last Update
06 Aug 2026 11:30
By Gabriel
Question
83
Apa akibat jika sisi udara turbocharger atau filter udara kotor?
What is the effect if the air side of the turbocharger or the air filter is dirty?
Options
a
Pasokan udara ke mesin berkurang dan pembakaran menjadi tidak sempurna
Air supply to the engine is reduced and combustion becomes incomplete
b
Tekanan udara start bertambah otomatis
Starting air pressure increases automatically
c
Bahan bakar menjadi lebih encer
The fuel becomes thinner
d
Purifier bahan bakar bekerja dua kali lebih cepat
The fuel purifier works twice as fast
Grade
Easy
Last Update
06 Aug 2026 11:33
By Gabriel
Question
84
Apa tujuan pemeriksaan indicator diagram atau data tekanan silinder?
What is the purpose of checking the indicator diagram or cylinder pressure data?
Options
a
Menilai kondisi pembakaran dan kompresi tiap silinder
To assess the combustion and compression condition of each cylinder
b
Mengukur kadar minyak di air bilga
To measure oil content in bilge water
c
Menentukan titik nyala bahan bakar
To determine the flash point of the fuel
d
Mengetahui jumlah udara di header tank
To find out the amount of air in the header tank
Grade
Easy
Last Update
06 Aug 2026 11:35
By Gabriel
Question
85
Tekanan kompresi yang rendah pada satu silinder dapat mengindikasikan apa?
What can low compression pressure in one cylinder indicate?
Options
a
Kebocoran katup, ring piston aus, atau keausan liner
Valve leakage, worn piston rings, or liner wear
b
Level air bilga terlalu tinggi
Bilge water level is too high
c
Tekanan udara start terlalu besar
Starting air pressure is too high
d
Putaran separator terlalu rendah
Separator speed is too low
Grade
Easy
Last Update
06 Aug 2026 11:36
By Gabriel
Question
86
Temperatur gas buang satu silinder yang terlalu tinggi sering menunjukkan apa?
What does excessively high exhaust gas temperature in one cylinder often indicate?
Options
a
Masalah pembakaran atau gangguan pada injector dan katup buang
Combustion problems or trouble with the injector and exhaust valve
b
Tekanan air pendingin laut terlalu rendah di seluruh kapal
Seawater cooling pressure is too low throughout the ship
c
Tabung udara start terisi penuh
The starting air receiver is full
d
Tangki service bahan bakar kosong total
The fuel service tank is completely empty
Grade
Medium
Last Update
06 Aug 2026 11:37
By Gabriel
Question
87
Apa fungsi exhaust valve pada mesin diesel 4 langkah?
What is the function of the exhaust valve in a 4-stroke diesel engine?
Options
a
Membuang gas hasil pembakaran dari silinder pada waktu yang tepat
To discharge combustion gas from the cylinder at the correct time
b
Memasukkan udara start saat langkah usaha
To admit starting air during the power stroke
c
Memasukkan minyak lumas ke ruang bakar
To admit lubricating oil into the combustion space
d
Membuang air pendingin dari jacket silinder
To discharge cooling water from the cylinder jacket
Grade
Easy
Last Update
06 Aug 2026 11:37
By Gabriel
Question
88
Apa fungsi turning gear pada mesin induk?
What is the function of the turning gear on the main engine?
Options
a
Memutar mesin secara perlahan saat pemeriksaan atau perawatan
To rotate the engine slowly during inspection or maintenance
b
Menambah putaran mesin saat kapal penuh muatan
To increase engine speed when the ship is fully loaded
c
Menyalurkan bahan bakar ke injector
To deliver fuel to the injector
d
Membuka katup start secara otomatis
To open the starting valve automatically
Grade
Easy
Last Update
06 Aug 2026 11:37
By Gabriel
Question
89
Mengapa mesin tidak boleh di-start saat turning gear masih engaged?
Why must the engine not be started while the turning gear is still engaged?
Options
a
Karena dapat merusak turning gear dan mesin secara serius
Because it can seriously damage the turning gear and the engine
b
Karena udara start akan menjadi terlalu dingin
Because the starting air will become too cold
c
Karena bahan bakar akan langsung membeku
Because the fuel will freeze immediately
d
Karena jacket water cooler akan tersumbat
Because the jacket water cooler will become clogged
Grade
Easy
Last Update
06 Aug 2026 11:38
By Gabriel
Question
90
Apa fungsi crankcase explosion relief valve?
What is the function of the crankcase explosion relief valve?
Options
a
Melepaskan tekanan ledakan crankcase secara aman dan mencegah nyala balik
To safely release crankcase explosion pressure and prevent flame blowback
b
Menaikkan tekanan oli di bantalan utama
To increase oil pressure in the main bearings
c
Membuang udara dari service tank bahan bakar
To discharge air from the fuel service tank
d
Mengatur temperatur air pendingin piston
To regulate piston cooling water temperature
Grade
Easy
Last Update
06 Aug 2026 11:39
By Gabriel