Question
61
Tanda yang mungkin muncul jika cylinder liner retak adalah?
What sign may appear if the cylinder liner cracks?
Options
a
Kehilangan kompresi atau kebocoran pendingin ke dalam silinder
Loss of compression or coolant leakage into the cylinder
b
Konsumsi bahan bakar turun drastis tanpa sebab lain
Fuel consumption drops drastically without another cause
c
Temperatur gas buang semua silinder menjadi sama persis
Exhaust gas temperature of all cylinders becomes exactly the same
d
Tekanan udara start meningkat terus saat mesin berhenti
Starting air pressure keeps increasing while the engine is stopped
Grade
Ungraded
Last Update
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Question
62
Keuntungan penggunaan cylinder liner yang dapat diganti adalah?
What is the advantage of using a replaceable cylinder liner?
Options
a
Perawatan dan overhaul lebih mudah tanpa mengganti seluruh blok
Maintenance and overhaul are easier without replacing the whole block
b
Putaran mesin menjadi selalu lebih tinggi
Engine speed always becomes higher
c
Tidak memerlukan sistem pelumasan
No lubrication system is required
d
Kebutuhan pendinginan menjadi hilang
Cooling requirements disappear
Grade
Ungraded
Last Update
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Question
63
Bagaimana cara umum memeriksa keausan cylinder liner?
How is cylinder liner wear commonly checked?
Options
a
Mengukur diameter dan ovalitas liner pada beberapa posisi
By measuring liner diameter and ovality at several positions
b
Melihat warna cat blok mesin dari luar
By looking at the paint color of the engine block from outside
c
Mengukur tinggi cerobong gas buang
By measuring the height of the exhaust funnel
d
Menimbang service tank sebelum jaga
By weighing the service tank before watchkeeping
Grade
Ungraded
Last Update
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Question
64
Apa fungsi utama piston?
What is the main function of the piston?
Options
a
Menerima tekanan pembakaran dan meneruskannya ke connecting rod
To receive combustion pressure and transmit it to the connecting rod
b
Menyemprotkan bahan bakar ke ruang bakar
To spray fuel into the combustion chamber
c
Membuka dan menutup katup buang
To open and close the exhaust valve
d
Mengatur tekanan minyak lumas di sump tank
To regulate lubricating oil pressure in the sump tank
Grade
Ungraded
Last Update
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Question
65
Apa fungsi compression ring pada piston?
What is the function of the compression ring on the piston?
Options
a
Menahan kebocoran gas pembakaran dan menjaga kompresi
To prevent combustion gas leakage and maintain compression
b
Menyaring bahan bakar sebelum injeksi
To filter fuel before injection
c
Menggerakkan camshaft dari crankshaft
To drive the camshaft from the crankshaft
d
Membuang sludge ke tangki limbah
To discharge sludge into the waste tank
Grade
Ungraded
Last Update
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Question
66
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
Last Update
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Question
67
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
Last Update
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Question
68
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
Last Update
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Question
69
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
Last Update
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Question
70
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
Last Update
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