Question
71
Mengapa bahan bakar berat harus dipanaskan sebelum diinjeksikan?
Why must heavy fuel oil be heated before injection?
Options
a
Agar viskositasnya turun sehingga atomisasi di injector menjadi baik
So that its viscosity decreases and atomization at the injector becomes good
b
Agar kandungan airnya meningkat
So that its water content increases
c
Agar tekanan udara start dapat dikurangi
So that starting air pressure can be reduced
d
Agar oli pelumas lebih cepat bercampur
So that lubricating oil mixes faster
Grade
Easy
Last Update
05 Aug 2026 11:23
By Gabriel
Question
72
Apa fungsi viscosity controller pada sistem bahan bakar?
What is the function of the viscosity controller in the fuel system?
Options
a
Menjaga viskositas bahan bakar pada nilai yang sesuai untuk injeksi
To maintain fuel viscosity at the proper value for injection
b
Menjaga kadar air dalam bahan bakar tetap tinggi
To keep the water content in the fuel high
c
Mengatur putaran purifier mengikuti gelombang
To regulate purifier speed according to wave motion
d
Menurunkan temperatur gas buang di cerobong
To reduce exhaust gas temperature in the funnel
Grade
Easy
Last Update
05 Aug 2026 11:23
By Gabriel
Question
73
Apa fungsi fuel injector pada mesin diesel?
What is the function of the fuel injector in a diesel engine?
Options
a
Mengabutkan dan menyemprotkan bahan bakar ke ruang bakar pada saat yang tepat
To atomize and inject fuel into the combustion space at the correct time
b
Mendinginkan udara bilas sebelum masuk silinder
To cool scavenge air before it enters the cylinder
c
Menaikkan tekanan minyak lumas di bantalan
To increase lubricating oil pressure in the bearings
d
Memasukkan udara start ke dalam silinder
To admit starting air into the cylinder
Grade
Easy
Last Update
05 Aug 2026 11:23
By Gabriel
Question
74
Apa akibat penginjeksian bahan bakar terlalu awal?
What is the effect of fuel injection being too early?
Options
a
Tekanan pembakaran dapat terlalu tinggi dan pembakaran menjadi sangat cepat
Peak combustion pressure may become too high and combustion becomes early
b
Mesin tidak dapat dikompresi sama sekali
The engine cannot be compressed at all
c
Gas buang menjadi terlalu dingin tanpa sebab
Exhaust gas becomes too cold for no reason
d
Pendinginan piston otomatis berhenti
Piston cooling stops automatically
Grade
Medium
Last Update
10 Aug 2026 14:28
By Gabriel
Question
75
Apa akibat penginjeksian bahan bakar terlalu lambat?
What is the effect of fuel injection being too late?
Options
a
Pembakaran terlambat, tenaga turun, dan temperatur gas buang cenderung naik
Combustion is delayed, power drops, and exhaust gas temperature tends to rise
b
Tekanan kompresi menjadi tak terbatas
Compression pressure becomes unlimited
c
Udara start langsung bocor ke crankcase
Starting air leaks directly into the crankcase
d
Viscosity controller berhenti bekerja
The viscosity controller stops working
Grade
Medium
Last Update
10 Aug 2026 14:25
By Gabriel
Question
76
Apa fungsi fuel pump plunger dalam fuel injection pump?
What is the function of the fuel pump plunger in the fuel injection pump?
Options
a
Membangkitkan tekanan tinggi untuk mengalirkan bahan bakar ke injector
To generate high pressure to deliver fuel to the injector
b
Mendinginkan nozzle injector dengan air tawar
To cool the injector nozzle with fresh water
c
Mencampur udara dan bahan bakar sebelum purifier
To mix air and fuel before the purifier
d
Membuka katup buang silinder secara mekanis
To open the cylinder exhaust valve mechanically
Grade
Medium
Last Update
10 Aug 2026 14:26
By Gabriel
Question
77
Mengapa sistem bahan bakar perlu di-vent setelah pekerjaan perawatan?
Why does the fuel system need to be vented after maintenance work?
Options
a
Untuk mengeluarkan udara dari pipa agar suplai bahan bakar kembali stabil
To remove air from the piping so that fuel supply becomes stable again
b
Untuk menaikkan kadar air di dalam bahan bakar
To increase the water content in the fuel
c
Untuk menurunkan tekanan injeksi ke nol
To reduce injection pressure to zero
d
Untuk menambah viskositas bahan bakar berat
To increase the viscosity of heavy fuel oil
Grade
Easy
Last Update
06 Aug 2026 11:49
By Gabriel
Question
78
Apa fungsi governor pada mesin induk atau mesin bantu?
What is the function of the governor on the main engine or auxiliary engine?
Options
a
Mengatur suplai bahan bakar agar putaran mesin tetap sesuai beban
To regulate fuel supply so that engine speed remains in accordance with the load
b
Mengatur kadar garam air pendingin
To regulate the salt content of cooling water
c
Mengatur tekanan udara di dalam tabung start
To regulate air pressure inside the starting air receiver
d
Mengatur suhu sludge di purifier
To regulate sludge temperature in the purifier
Grade
Easy
Last Update
06 Aug 2026 11:49
By Gabriel
Question
79
Apa fungsi overspeed trip pada mesin diesel?
What is the function of the overspeed trip on a diesel engine?
Options
a
Menghentikan atau membatasi kerja mesin saat putaran melebihi batas aman
To stop or limit engine operation when speed exceeds the safe limit
b
Menaikkan putaran mesin saat kapal olah gerak
To increase engine speed during maneuvering
c
Menambah tekanan bahan bakar agar pembakaran sempurna
To increase fuel pressure so that combustion becomes perfect
d
Menurunkan salinitas air tawar pendingin
To reduce the salinity of fresh cooling water
Grade
Easy
Last Update
06 Aug 2026 11:50
By Gabriel
Question
80
Apa fungsi turbocharger pada mesin diesel kapal?
What is the function of the turbocharger on a marine diesel engine?
Options
a
Memanfaatkan energi gas buang untuk memampatkan udara masuk ke mesin
To use exhaust gas energy to compress the air entering the engine
b
Memanfaatkan air laut untuk menaikkan tekanan bahan bakar
To use seawater to increase fuel pressure
c
Memutar poros engkol saat start dingin
To rotate the crankshaft during cold starting
d
Mendinginkan piston dengan gas buang
To cool the piston with exhaust gas
Grade
Medium
Last Update
10 Aug 2026 14:30
By Gabriel