首页/ 题库 / [单选题]If air at 95℃ dry bu的答案

If air at 95℃ dry bulb temperature and 50% relative humidity is conditioned to 75℃ dry bulb temperature and 50% relative humidity, it is an example of （）.

单选题
2022-06-03 00:13
A、cooling only
B、cooling and humidifying
C、cooling and dehumidifying
D、adiabatic cooling
查看答案
正确答案
C
试题解析
标签： 船舶辅助机械
感兴趣题目
Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure （） the saturation temperature.
If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）
A cargo hold has been determined to have a relative humidity of 80% and a dry bulb temperature of 80 ℃ and a dry bulb temperature of 85℃.When the hold is sealed and the dry bulb temperature decreases, the relative humidity in the space will （）
When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.
If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）
（） is the circulation and refreshing of the air in a space without necessarily a change of temperature.
Sand painting has also called dry or earth painting and is practiced by several American Indian artists.
If air at 95℃ dry bulb temperature and 50% relative humidity is conditioned to 75℃ dry bulb temperature and 50% relative humidity, it is an example of （）.
When loading or discharging dry mud or cement，crew members should use goggles and（）.
The humidifier’s valve of air-conditioner should be （）, when the temperature is 5~8°C in the winter.
As the amount of moisture in the air increases, the difference between the dry bulb and wet bulb temperature will （）.

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
相关题目
He left ____________ sobbing at last, and dried his eyes with his handkerchief
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
Every piece was handed tentimes or more. And the drying
[选择题,2分] Every piece was handed tentimes or more. And the drying
Ann left off sobbing at last, and dried her eyes with her handkerchief.
There shall be（）into sleeping rooms from cargo and machinery spaces or from galleys,storerooms,drying rooms or communal sanitary areas.
Pump up the starting air reservoirs to their maximum pressure and （）the air reservoirs and air system.
As the temperature of an air mass decreases，the（）.
Air temperature varies with（）.

The effective temperature of air is dependent upon（）
Ⅰ.relative humidity
Ⅱ.air velocity
CFC refrigerants exposed to high temperature or direct flame, will decompose and may produce（）
Freon 12 which is used to produce intense cold is normally a （） when at atmospheric pressure and temperature.
When two different metals are joined to form a closed circuit and exposed to different temperatures at their junctions （） which can be used to measure temperature.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
As the temperature of the air reaches the dew point，（）.
In reference to air conditioning, when air attains the maximum amount of moisture it can hold at a specific temperature, it is said to be （）.
While on watch，you notice that the air temperature is dropping and is approaching the dew point.Which type of weather should be forecasted（）.
The amount of moisture in a given sample of air, when compared with the amount of moisture the air could hold if totally saturated at the existing temperature of the sample, is called （）.
Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.
If the compressor-discharge temperature is higher than the receiver temperature（）
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

题库考试答案搜索网 2022 ©

关于我们网站声明合作共赢