The air cylinder bottles in the survival craft should be refilled with（）. -题库考试答案搜索网

The air cylinder bottles in the survival craft should be refilled with（）.

单选题

2022-06-03 01:04

A、oxygen
B、nitrogen
C、compressed air
D、nitrogen and oxyge

查看答案

正确答案

C

试题解析

标签：包装危险品与IMDG规则

感兴趣题目

The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）

With supercharging a larger mass of air is supplied to the cylinder by blowing it in under pressure, which is the best means to （） of the engine.

In the experiment, the burning inside the bottle can___.

The air cylinder bottles in the survival craft should be refilled with（）.

______no air or water, there would be no life in the world.

（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.

The air cylinder bottles in the survival craft should be refilled with（）.

An after-cooler installed between the turbocharger and the cylinder air inlet （）

Air compressor cylinder un-loaders enable the compressor to （）.

In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.

Exhaust temperature increases in all cylinders, the possible cause may be（）
(1) increased scavenging air temperature
(2) air in fuel pumps and fuel valves
(3) fouling of air and gas passages

When the order （） is received from the bridge, the main air stop valve in the starting air line should be shut.

相关题目: The air filter is fixed in the （） of an air compressor.; 第二组Under normal operation, some lubrication oil mist may be discharged from the air compressor to the air start system. This oil may be from excess compressor cylinder lubrication, from faulty oil scraper rings, or may even be suspended oil vapor contaminating the engine room atmosphere and drawn in at the compressor suction. Oil discharge is kept to a minimum by draining the after cooler, air receiver and starting system. If small quantities of lubrication oil do get passed into the starting air system, they will deposit as thin moist film over internal pipe surfaces but are not readily combustible. If a cylinder non-return valve leak while the engine is in operation, some hot gas, possibly with unburned fuel and cylinder lubrication oil, may be blown through the valve to the adjacent air manifold. With further heating from the leaky valve, this, together with the already deposited oil film, will carbonize and form. incandescent carbon. If starting air is applied to the system while still hot, the high pressure air coming into contact with the burning carbon may cause an explosion. Such an explosion will cause a flame to pass back through the air start pipe system, evaporating the deposited oil film and igniting it in the presence of air. Very high velocities and shockwaves are generated which may rupture pipes and fittings.Alternatively, if excessive oil has entered the air start system, a mixture of air and oil droplets may be discharged through the open cylinder non-return valve during starting. This spray may ignite due to high temperatures in the cylinder, causing a flame through the still open valve to the air manifold.To prevent an explosion, air start valves must be correctly maintained and lubricated to ensure correct timing and free movement with positive closing. Oil in the system must be kept to a minimum, pipe lines must be drained and cleaned internally when necessary and oil discharge from air compressors must be kept to a minimum by good maintenance.The passage is mainly about; He filled the bottle in wine; The air supplied to the cylinders by a turbocharger is often reduced in volume by a/an （）; If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）; ----The baby is hungry. ----But there's（）milk in the bottle.; When starting an engine, the compressed air enters the cylinder when the corresponding piston is in position of its（）; （） supplies pilot air to control the cylinder air start valves.; In the suction stroke air is induced into the cylinder （）In the compression stroke the air is compressed.; When the dew point of the outside air is lower than or equal to the dew point of the air in the cargo hold，you should（）.; Operating conditions in the crank chamber are very （） those in the cylinder.; The starting air entering the cylinder begins when the piston（）; Usually we take the cooling effect of the air flown through the cylinder during the overlap period as（）; The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.; （） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.; The starting air bottle should be pumped up to maximum pressure by the （） before start of the engine.; Before starting the engine the air bottle should be （）.; 根据IMDG规则的规定，危险货物分为（）大类，共（）类别。; When the air charge contacts with the cylinders and pistons and mixes with the residual gases, it will（）; Charging is the filling of the engine cylinder with a supply or charge of fresh air （） compression.

广告位招租WX:84302438

题库考试答案搜索网

免费的网站请分享给朋友吧