正确答案: C

is pressurized

题目：As the plunger moves up, the ports are closed and the fuel （） and delivered to the injector nozzle at very high pressure.

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学习资料的答案和解析：

[单选题]超级汽轮发电系统（STG）是废热利用联合装置，其余热利用装置有（）。Ⅰ.废气/蒸汽联合驱动的涡轮发电机；Ⅱ.空气冷却器；Ⅲ.废气锅炉

Ⅰ+Ⅱ+Ⅲ

[单选题]吊缸检修柴油机连杆螺栓时一定要（）。

磁力探伤或着色探伤

[单选题]当曲柄的Δ-＝（＋）值时，该曲柄的两个主轴承位置偏（），曲轴轴线呈（）状态。

右/“）”

[单选题]在高增压柴油机上，排气阀阀盘的温度可达（）℃。

A．650～800

[单选题]In a four-stroke engines the camshaft rotates at （）.

half the engine rotational speed

[单选题]The space between cylinder liner and jacket is called （）.

the cooling water space

[单选题]The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust （）.

gas temperature