Question
71
Apa fungsi oil ring pada piston?
What is the function of the oil ring on the piston?
Options
a
Mengontrol jumlah minyak lumas pada dinding liner
To control the amount of lubricating oil on the liner wall
b
Menaikkan temperatur ruang bakar
To increase combustion chamber temperature
c
Menyuplai udara bilas ke bawah piston
To supply scavenging air beneath the piston
d
Menahan putaran flywheel saat start
To restrain flywheel rotation during starting
Grade
Ungraded
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Question
72
Apa fungsi piston pin atau gudgeon pin?
What is the function of the piston pin or gudgeon pin?
Options
a
Menghubungkan piston dengan connecting rod
To connect the piston to the connecting rod
b
Menghubungkan crankshaft dengan flywheel
To connect the crankshaft to the flywheel
c
Menghubungkan katup buang dengan camshaft
To connect the exhaust valve to the camshaft
d
Menghubungkan injektor dengan pipa tekanan tinggi
To connect the injector to the high-pressure pipe
Grade
Ungraded
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Question
73
Apa fungsi connecting rod?
What is the function of the connecting rod?
Options
a
Meneruskan gerak piston ke poros engkol
To transmit piston movement to the crankshaft
b
Menampung minyak lumas untuk seluruh mesin
To store lubricating oil for the whole engine
c
Menyemprotkan pendingin ke kepala silinder
To spray cooling medium onto the cylinder head
d
Menggerakkan purifier dari motor listrik
To drive the purifier from the electric motor
Grade
Ungraded
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Question
74
Apa fungsi crankshaft pada mesin diesel?
What is the function of the crankshaft in a diesel engine?
Options
a
Mengubah gerak bolak-balik piston menjadi gerak putar
To convert the reciprocating motion of the piston into rotary motion
b
Mengabutkan bahan bakar di akhir kompresi
To atomize fuel at the end of compression
c
Menurunkan temperatur gas buang
To reduce exhaust gas temperature
d
Mengontrol salinitas air pendingin
To control cooling water salinity
Grade
Ungraded
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Question
75
Apa fungsi flywheel?
What is the function of the flywheel?
Options
a
Menstabilkan putaran mesin dengan menyimpan energi kinetik
To stabilize engine rotation by storing kinetic energy
b
Menaikkan tekanan udara start
To increase starting air pressure
c
Mengatur temperatur minyak lumas
To regulate lubricating oil temperature
d
Memisahkan air dari bahan bakar
To separate water from fuel
Grade
Ungraded
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Question
76
Apa fungsi utama camshaft?
What is the main function of the camshaft?
Options
a
Mengatur pembukaan dan penutupan katup sesuai timing mesin
To regulate the opening and closing of valves according to engine timing
b
Mengatur tekanan kerja purifier
To regulate purifier working pressure
c
Menghubungkan piston ke poros baling-baling
To connect the piston to the propeller shaft
d
Mengalirkan air laut ke cooler
To circulate seawater to the cooler
Grade
Ungraded
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Question
77
Camshaft pada mesin diesel umumnya digerakkan oleh?
The camshaft in a diesel engine is generally driven by what?
Options
a
Roda gigi atau rantai timing dari poros engkol
Timing gears or a chain from the crankshaft
b
Sabuk kain dari flywheel
A fabric belt from the flywheel
c
Tekanan udara dari start air receiver
Air pressure from the start air receiver
d
Aliran minyak lumas dari sump tank
Lubricating oil flow from the sump tank
Grade
Ungraded
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Question
78
Pada mesin empat langkah, hubungan putaran camshaft terhadap crankshaft adalah?
In a four-stroke engine, what is the rotational relationship between the camshaft and crankshaft?
Options
a
Camshaft berputar setengah putaran crankshaft
The camshaft rotates at half the speed of the crankshaft
b
Camshaft berputar dua kali putaran crankshaft
The camshaft rotates twice the speed of the crankshaft
c
Camshaft dan crankshaft selalu sama putarannya
The camshaft and crankshaft always rotate at the same speed
d
Camshaft tidak berhubungan dengan crankshaft
The camshaft has no relationship with the crankshaft
Grade
Ungraded
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Question
79
Apa tujuan penyetelan celah katup?
What is the purpose of valve clearance adjustment?
Options
a
Menjamin katup dapat menutup rapat saat mesin mencapai temperatur kerja
To ensure the valves can close tightly when the engine reaches operating temperature
b
Meningkatkan tekanan bahan bakar ke injektor
To increase fuel pressure to the injectors
c
Menambah viskositas minyak lumas
To increase lubricating oil viscosity
d
Menurunkan temperatur udara bilas
To reduce scavenging air temperature
Grade
Ungraded
Last Update
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Question
80
Apa akibat celah katup terlalu kecil?
What is the effect of valve clearance being too small?
Options
a
Katup dapat tidak menutup rapat saat panas sehingga kompresi bocor
The valve may not close tightly when hot, causing compression leakage
b
Waktu buka katup menjadi selalu lebih lama tanpa dampak lain
Valve opening duration always becomes longer without any other effect
c
Minyak lumas di sump tank langsung habis
Lubricating oil in the sump tank runs out immediately
d
Turbocharger berhenti berputar mendadak
The turbocharger suddenly stops rotating
Grade
Ungraded
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