正确答案: A

pressure charged

题目：In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.

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学习资料的答案和解析：

[单选题]要求机座全部底脚螺栓中的（）以上的螺栓采用紧配螺栓，以防机座移位。

B．15%

[单选题]喘振是（）流通部分出现气流与叶片强烈撞击和脱流的结果。

压气机

[单选题]消除螺旋桨鸣音的办法是将随边（）制成抗鸣边缘，从而改变涡流引起的振动频率。

0.4R～0.7R处

[单选题]An aluminum piston has lower inertia and higher coefficient of （） compared to that of cast iron.

thermal expansio

[单选题]The design of （） is similar to that of the main bearing.

the connecting rod large end bearing

[单选题]The process to remove exhaust gases by blowing in fresh air is called （）.

scavenging

[单选题]Increasing the valve clearance between a valve stem and rocker arm, will result in the valve （）

staying open for a shorter period of time

[单选题]A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.

opposed pistons engine