Acid solution（） in the system can be tested from time to t

【名词&注释】

动平衡试验(dynamic balance test)、增压器转子(blower rotor)

[单选题]Acid solution（） in the system can be tested from time to time by putting some on to a piece of lime.

A. strength
B. dense
C. percentage
D. velocity

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学习资料：

[单选题]（）时应对增压器转子进行动平衡试验。

A. A．更换轴承
B. B．更换部分叶片
C. C．定期清洗
D. D．更换气封或油封

[单选题]相邻轴同轴，其连接法兰处偏中值为（）。

A. A．δ＝0、φ＝0
B. B．δ≠0、φ≠0
C. C．δ＝0、φ≠0
D. D．δ≠0、φ＝0

[单选题]中间轴承的工作轴颈一般较非工作轴颈大（）mm。

A. 5～10
B. 5～15
C. 5～20
D. 10～20

[单选题]船轴工作轴颈磨损严重时，可依据磨损程度采用（）等方法予以修复。Ⅰ.打磨；Ⅱ.光车；Ⅲ.喷涂恢复尺寸；Ⅳ.镀铁恢复尺寸；Ⅴ.镶钢套。

A. Ⅱ＋Ⅲ＋Ⅳ＋Ⅴ
B. Ⅰ＋Ⅱ＋Ⅳ
C. Ⅲ＋Ⅳ
D. Ⅰ＋Ⅲ＋Ⅳ

[单选题]In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to （）.

A. the outlet of oil
B. the outlet of water
C. the bowl periphery
D. the center of bowl

[单选题]On opposite ends of a single shaft of a turboblower are a gas driven （）and a air compressor, which are sealed each other.

A. charge air receiver
B. scavenging air belt
C. turbine
D. air cooler

[单选题]With regards to a diesel engine crankcase explosion, the most violent is the（）(1) primary explosion(2) secondary explosion

A. (1) only
B. (2) only
C. both (1) and (2)
D. neither (1) or (2)

[单选题]How would the exhaust of a properly operating diesel engine appear?（）.

A. Light blue haze
B. Light brown haze
C. Light gray haze
D. Perfectly clear

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