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单选题
（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.
A
The fuel oil
B
The lube oil
C
The sea water
D
The fresh water
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a cracked cylinder linerB
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coolingD
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单选题Diesel engine cylinder head test cocks are used to（）A
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pressure test cylinder heads to check for leaksD
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单选题Which of the following statements is correct for the design and installation of diesel engine cooling water systems?（）A
An alarm device with audible and visible signals is required for all cooling water systemsB
Propulsion engines with bores over 200 mm are to be fitted with cooling water jacketsC
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prevent any piston contact with the cylinder liner
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opening the exhaust portsB
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单选题To minimize the formation of carbon deposits on fuel injection nozzles, you should （）A
avoid using liquid-cooled nozzles whenever possibleB
avoid low cooling water temperaturesC
avoid prolonged overloading of the engineD
make certain the gasket seal between the nozzle and cylinder head is tight
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crossheadD
exhaust manifold
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单选题Diesel engine cylinder head test cocks are used to （）A
check cylinder lubricationB
connect the pressure indicator pressureC
test cylinder headsD
connect the exhaust gas pyrometers
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