当液压拉伸器的用油变质时，应当用（）来清洗和替代。

【名词&注释】

液压油(hydraulic oil)、排气阀(exhaust valve)

[单选题]当液压拉伸器的用油变质时，应当用（）来清洗和替代。

A. 适合黏度的透平油
B. 适合黏度的油缸油
C. 适合黏度的液压油
D. 适合黏度的透平油或液压油

查看答案&解析 查看所有试题

学习资料：

[单选题]在高增压柴油机上，排气阀阀盘的温度可达（）℃。

A. A．650～800
B. B．450～600
C. C．500～650
D. D．450～500

[单选题]船舶舵系是实现船舶（）等操纵的航向控制装置。Ⅰ.转向；Ⅱ.前进；Ⅲ.后退；Ⅳ.掉头；Ⅴ.直航。

A. Ⅰ＋Ⅱ
B. Ⅰ＋Ⅳ＋Ⅴ
C. Ⅲ＋Ⅳ＋Ⅴ
D. Ⅰ＋Ⅱ＋Ⅲ

[单选题]A: Please tell me the specifications and quantity.B: （）

A. Pump diesel oil first
B. 300 tons of 180 cst fuel oil
C. The figure is all right
D. OK, I’ll sign it

[单选题]Main bearings are required to support the crankshaft at each （）.

A. end
B. web
C. pin
D. journal

[单选题]The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in （） while that for latter one is （）.

A. sufficient quantity； measured
B. measured quantity；sufficient
C. excessive quantity；sufficient
D. the less quantity the better；the more the better

[单选题]In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.

A. metal particles loosened by wear
B. air when no air cleaners are used
C. condensation of water vapors
D. breakdown of the lubricating oil by dilutio

[单选题]Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.

A. temperature
B. pressure
C. engine speed
D. all of the above

[单选题]A simplified construction plan may be included in the ship construction portfolio provided it adequately defines the（）.

A. areas where special materials are used
B. hazardous areas
C. location of emergency repair equipment
D. type and strength of materials used

[单选题]What does a pyrometer measure on a diesel engine? （）

A. Water temperature
B. Water pressure
C. Exhaust temperature
D. Air box pressure

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