Question
31
Siapa yang dikenal sebagai penemu mesin diesel?
Who is known as the inventor of the diesel engine?
Options
a
Rudolf Diesel
Rudolf Diesel
b
James Watt
James Watt
c
Nikola Tesla
Nikola Tesla
d
Henry Ford
Henry Ford
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Question
32
Di bagian mana energi panas hasil pembakaran diubah menjadi tekanan kerja utama?
In which part is heat energy from combustion converted into the main working pressure?
Options
a
Di dalam silinder
In the cylinder
b
Di dalam alternator
In the alternator
c
Di dalam purifier
In the purifier
d
Di dalam air cooler
In the air cooler
Grade
Ungraded
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Question
33
Apa fungsi utama turbocharger?
What is the main function of the turbocharger?
Options
a
Memampatkan udara masuk dengan memanfaatkan energi gas buang
To compress intake air by using exhaust gas energy
b
Mendinginkan minyak lumas sebelum masuk mesin
To cool lubricating oil before it enters the engine
c
Menggerakkan pompa bahan bakar secara mekanis
To drive the fuel pump mechanically
d
Mengurangi tekanan kompresi silinder
To reduce cylinder compression pressure
Grade
Ungraded
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Question
34
Bagaimana mesin diesel menghasilkan tenaga?
How does a diesel engine produce power?
Options
a
Melalui pembakaran bahan bakar di dalam silinder yang mendorong piston
Through fuel combustion inside the cylinder that pushes the piston
b
Melalui pemanasan air laut menjadi uap di crankcase
By heating seawater into steam inside the crankcase
c
Melalui gaya magnet pada poros engkol
Through magnetic force on the crankshaft
d
Melalui kompresi udara di luar silinder tanpa pembakaran
Through air compression outside the cylinder without combustion
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Ungraded
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Question
35
Apa yang dimaksud dengan rasio kompresi?
What is meant by the compression ratio?
Options
a
Perbandingan volume silinder saat piston di titik mati bawah terhadap titik mati atas
The ratio of cylinder volume when the piston is at bottom dead center to top dead center
b
Perbandingan jumlah bahan bakar terhadap minyak lumas
The ratio of fuel quantity to lubricating oil
c
Perbandingan tekanan udara bilas terhadap tekanan atmosfer
The ratio of scavenging air pressure to atmospheric pressure
d
Perbandingan diameter silinder terhadap langkah piston
The ratio of cylinder diameter to piston stroke
Grade
Ungraded
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Question
36
Urutan langkah pada mesin diesel empat langkah adalah?
What is the sequence of strokes in a four-stroke diesel engine?
Options
a
Hisap, kompresi, usaha, buang
Suction, compression, power, exhaust
b
Kompresi, usaha, hisap, buang
Compression, power, suction, exhaust
c
Hisap, usaha, kompresi, buang
Suction, power, compression, exhaust
d
Buang, hisap, usaha, kompresi
Exhaust, suction, power, compression
Grade
Ungraded
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Question
37
Apa yang dimaksud dengan injektor?
What is meant by an injector?
Options
a
Komponen yang mengabutkan bahan bakar ke ruang bakar pada tekanan tertentu
A component that atomizes fuel into the combustion chamber at a certain pressure
b
Komponen yang mendinginkan piston dengan air tawar
A component that cools the piston with fresh water
c
Komponen yang membuang gas buang ke cerobong
A component that discharges exhaust gas to the funnel
d
Komponen yang mengatur putaran poros baling-baling
A component that regulates propeller shaft speed
Grade
Ungraded
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Question
38
Mengapa mesin diesel banyak digunakan sebagai penggerak kapal?
Why are diesel engines widely used as ship propulsion engines?
Options
a
Karena kuat, efisien, dan mampu menghasilkan torsi besar pada beban berat
Because they are robust, efficient, and able to produce high torque under heavy load
b
Karena tidak membutuhkan sistem pendingin dan pelumasan
Because they do not require cooling and lubrication systems
c
Karena dapat memakai bensin tanpa perubahan sistem
Because they can use gasoline without system modification
d
Karena lebih ringan daripada motor listrik pada semua ukuran
Because they are lighter than electric motors in all sizes
Grade
Ungraded
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Question
39
Perawatan rutin yang penting untuk mesin diesel adalah?
What routine maintenance is important for a diesel engine?
Options
a
Penggantian minyak lumas, filter, dan pemeriksaan sistem bahan bakar serta pendingin
Changing lubricating oil and filters, and checking the fuel and cooling systems
b
Menambah air laut ke dalam minyak lumas secara berkala
Adding seawater into the lubricating oil regularly
c
Mengoperasikan mesin terus-menerus tanpa inspeksi
Operating the engine continuously without inspection
d
Mengganti poros engkol setiap jadwal jaga
Replacing the crankshaft every watch schedule
Grade
Ungraded
Last Update
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Question
40
Salah satu penyebab pembakaran tidak sempurna adalah?
What is one cause of incomplete combustion?
Options
a
Pengabutan bahan bakar yang buruk dari injektor
Poor fuel atomization from the injector
b
Temperatur air laut di luar kapal terlalu rendah
The seawater temperature outside the ship is too low
c
Tinggi gelombang di sekitar kapal berubah
The wave height around the ship changes
d
Warna cat mesin memudar karena panas
The engine paint color fades due to heat
Grade
Ungraded
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