All of the diesel engine cylinder firing pressures are normal, yet all of the exhaust temperatures are lowWhich of the following situations is responsible for this condition?（）

A、Excessively early injection timing

B、Combustion knock

C、Leaking piston rings

D、Light load

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更多“All of the diesel engine cylinder firing pressures are normal, yet all of the exhaust temperatures are lowWhich of the following situations is responsible for this condition?（）”相关的问题

第1题

[单选题] The efficient burning of fuel in a diesel engine is dependent upon the （）

A、temperature of compression B、atomization of the fuel C、penetration of the fuel D、all of the above

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第2题

[单选题] Following an overhaul of a crosshead type diesel engine, the engine is jacked over with the turning gear as part of the pre-start procedure, which of the listed pre-start procedures should be carried out?（）

A、Ensure proper cylinder lube oil flow B、Open all air space drain cocks C、Open all indicator valves D、all of the above

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第3题

[单选题] In describing basic diesel engine operation，the term ‘event’ refers to （）

A、the production of high pressure gases B、the removal of expended combustion gases C、the admission of air to the cylinder D、all of the above

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第4题

[单选题] The shape of a cam on a diesel engine determines the valve’s （）

A、point of opening B、speed of opening C、lift from its seat D、all of the above

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第5题

[单选题] The crankcases of many diesel engines are kept under a slight vacuum to （）

A、improve fuel economy B、increase the air charge velocity C、reduce the risk of explosion D、all of the above

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第6题

[单选题] Cracking of a diesel piston crown can result from（）

A、Excessive piston to liner clearance B、The underside of the piston crown being excessively dirty lowering the rate of heat transfer C、Faulty nozzle spray D、All of the above

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第7题

[单选题] Diesel engine piston seizure can be caused by （）

A、poor cooling of cylinder walls B、improper cooling of the piston C、insufficient piston lubrication D、all of the above

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第8题

[单选题] Before starting any diesel or gasoline engine，which of the following must be checked? （）

A、Oil level B、Flow of cooling water C、Exhaust discharge D、All of the above

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第9题

[单选题] Which of the following conditions would cause carbon deposits to form in the piston ring belt of a diesel engine?（）

A、faulty combustion B、excessive ring temperature C、over lubrication D、all of the above