更多"To avoid impingement attack, care m"的相关试题:
[单项选择]Care must be taken to condition the （）in the boiler to prevent scaling, and corrosion, which can weaken the pressure vessel.
A. water
B. fuel
C. steam
D. air
[单项选择]Every precaution must be taken to avoid （）.
A. sparking being taking place
B. to spark taking place
C. sparking to be taken place
D. sparking taking place
[单项选择]Any action taken to avoid collision shall，if the circumstances of the case admit，（）.
A. be positive
B. be positive and made in ample time
C. be positive，made in ample time and with due regard to the observance of good seamanship
D. be positive，made in ample time，with due regard to the observance of good seamanship and avoiding complying with local regulations
[单项选择]Which of the following precautions must be taken if an electric immersion heater is used to keep the coolant in a diesel engine warm during the time the engine is secured?（）
A. The coolant temperature must be maintained at 180℃
B. The thermostatic bypass valves must be manually opened before the engine is started
C. The pressure cap must be removed while the engine is secured
D. Electrical power to the heater must be secured before the cooling system is drained
[单项选择]What action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?（）
A. The tank must be gas freed
B. The tank must be ballasted
C. The tank must be vented to the atmosphere
D. The bypass valve must also be closed
[单项选择]Which action must be taken when an individual cargo tank is closed off from the inert gas system by the tank isolation valve?（）
A. The tank must be gas freed
B. The tank must be ballasted
C. The tank must be vented to the atmosphere
D. The bypass valve must also be closed
[单项选择]Precautionary measures must be taken to（）safety of the stevedores，cargo and the ship.
A. insure
B. ensure
C. assure
D. assume
[单项选择]You must take good care of the drainage cock of the air control systemBecause （） leads scale formed which might malfunction the pilot control valve and other instruments.
A. the temperature
B. the rust
C. the pressure
D. the humidity
[单项选择]（）, remedies must be taken to stop it as early as possible.
A. Any surge occurs
B. Any surge occurred
C. Should any surge occur
D. Should any surge occurring
[单项选择]总分配系数d=Σwi*Kdi中，Wi为（）。
A. 矿物数
B. 矿物中元素的分配系数
C. 每种矿物在集合体中所占的重量百分数
D. 矿物种类
[判断题]脑结核球钙化在T1WI和T2WI均为高信号。
[判断题]蛛网膜囊肿在T1WI呈高信号，T2WI呈高信号。
[判断题]少枝胶质细胞瘤在T1WI上为低信号，T2WI为低信号。
[单项选择]To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should （）
A. ground the board
B. avoid reversing the polarity of the leads
C. isolate sensitive components with heat sinks
D. all of the above
[判断题]脊索瘤MRI检查时，T1WI上呈低信号，T2WI上呈高信号。
[单项选择]在成人MRI影响上，T1WI和T2WI均呈高信号的部位为（）
A. 骨皮质
B. 神经根
C. 椎间盘
D. 硬膜囊
E. 骨髓
