For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an （）.
- Aoil spray
- Boil bath
- Coil control rings
- Ddrilled passage through the camshaft
问题
For diesel engine piston cooling, lubr
参考解析：
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1、Trunk-type diesel engine pistons are m
Trunk-type diesel engine pistons are most effectively cooled by heat（）Aconducted through the engine blockBconducted to water cooled cylinder wallsCconducted through the piston crownDloss to escaping exhaust gase
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2、In a diesel engine cooling water syste
In a diesel engine cooling water system, a pH of 60 indicates a/an （）.Aslightly acidic conditionBslightly alkaline conditionCovertreatment of waterDneutral condition of water
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3、Trunk type diesel engine pistons are e
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4、The cooling water of the diesel engine
The cooling water of the diesel engine should be treated, because it has（）Aalkale scenceBacidityCsalinityDimpurity
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5、Improper cooling of a diesel engine cy
Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits may cause （）.Alow compression pressureBincreased piston wearCincreased cylinder lube oil consumptionDpoor contact between compression rings and liner
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6、In a trunk type diesel engine piston,
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