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【单选题】

When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?()

A、Quantity of fuel injected tends to be decreased

B、Quantity of fuel injected will always be increased

C、Start of injection tends to be advanced

D、Duration of injection will always greater

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第2题

A、Pre-lube cylinders with hand cranks  B、Open all air space drain cocks  C、Open all indicator valves  D、All of the above  

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第4题

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第5题

A、the inlet valve is open  B、the exhaust valve is open  C、both valves are close  D、both valves are open  

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第6题

A、holding the discharge valve open  B、relieving the intercooler pressure to the atmosphere  C、using an enlarged, permanently opened clearance expansion space  D、a pre-charged accumulator  

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第9题

A、closed  B、opened  C、handled  D、opened and closed  

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第10题

A、When the helm is at any angle other than amidships  B、When the six-way valve is opened  C、When the ram relief valves lift  D、When the redder angle is different from the position of the helm  

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