首页/ 题库 / [单选题]The latent heat of w的答案

The latent heat of water vapor in air is dependent upon the ()

单选题
2022-03-01 08:59
A、dry bulb temperature
B、wet bulb temperature
C、dew point
D、dry point
查看答案

正确答案
C

试题解析

感兴趣题目
Latent heat changes the () of water.
Which of the listed conditions will cause the feed water that has not flashed to vapor in the first-stage of a flash evaporator, to flow into the second-stage?()
()reters to be amount of water vapour in the air.
______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.
For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes?()
Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at().
The most serious effect of air trapped in a diesel engine jacket water cooling system is that it().
As the air passes through the charge air cooler, its temperature may be reduced and moisture condensed, with the condensate in danger of being carried into the engineSo a water separator should be mounted beneath the bottom part of the engine inlet manifoldA water separator is used in order to ().
Too much excess air is ()because the heat generated is being lost through the exhaust trunking instead of being made used of in heating the water to produce steam.
In a shell-and-tube type hydraulic fluid cooler, the amount of heat transferred from the hydraulic fluid to the cooling water depends upon()
Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?()
相关题目
The air filter is fixed in the () of an air compressor.
What is the most usual reason for the fresh water-sea water heat exchanger fouling in the sea side?
The forced draught fan should be started and air passed through the furnace for several minutes to “()” it of any exhaust gas or oil vapors.
The vapors given off by heated fuel oil are heavier than air and are().
Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be () to maintain ambient conditions within the comfort zone by air conditioning.
The weight of liquefied petroleum gas vapors as compared to air is().
Class I and II private aids to navigation in or along navigable waters of the United States are listed in the().
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().
A condenser is a vessel in which() is deprived of its latent heat of vaporization and so changed to its liquid state.
The rate of heat transfer in a water-tube auxiliary boiler can be increased by ().
In a compression refrigeration plant the refrigerant flows from the expansion valve and through the () where it absorbs heat from the space being cooled and becomes a gas or vapor.
In (), hot diesel engine jacket water passes over the stack and heats the sea water passing through the tubes.
Small droplets of water entrained in the flashed vapor produced in a flash-type evaporator, are removed by the ()
When bilge water is heated in a holding tank, which one of the following statements is not accurate?()
The minimum concentration of a vapor in air which can form an explosive mixture is called the().
Practice 1  Heat loss by sweating depends on the fact that when a liquid evaporates, it absorbs an enormous quantity of heat from its surroundings. Therefore, when I am of sweat evaporate, a great deal of heat is absorbed from the surface of the body in contact with it. 1______  2______ The first is the amount of movement of air surrounding the body. The second is the amount of water vapor in the air that surrounds the body.  3______ For this reason, sweat evaporates very rapidly on windy days, and the rate of heat loss by sweating is much more than on a still day. This accounts for the fact that hot still days are much less comfortable than hot windy days. In contrast, the sweat evaporates very rapidly on hot windy days, and cools the body quickly and effectively.  4______ When air is carrying the maximum amount of water vapor that it can hold, it is said to be 100% saturated with water vapor. The relative humidity of the air is said to be 100%. Under these conditions the air cannot carry any water, so no water can evaporate. When the relative humidity is high, therefore, sweat cannot evaporate. Instead, it forms large drops and runs off your skin without cooling you.  5______ It is obvious that under these conditions, evaporation will be much more rapid. Therefore, sweating will be much more effective as a method of losing heat from the body. On a hot dry day, sweat evaporates as soon as it is formed, and you feel reasonably cool even though the temperature of your environment is very high.[A] When the air is very dry and carries no water at all, the relative humidity is said to be 0%.[B] The second factor is the amount of water vapor in the air-the humidity.[C] Hot windy days are much more comfortable than hot still days.[D] This heat transfer occurs even if the environment is hotter than the body.[E] When air moves over the surface of water, the amount of evaporation is greatly increased.[F] You might expect the highest incidence of a heat stroke when the maximum temperature is 100 and humidity is 50%.[G] Two factors affect the rate of evaporation of sweat, and therefore the effectiveness of sweating as a method of cooling the body.
The sensible heat of air is dependent upon the ().
The latent heat of water vapor in air is dependent upon the ()
The sum of the sensible heat and the latent heat of any substance is known as ().
The temperature at which water vapor in the atmosphere begins to condense is called the ().
广告位招租WX:84302438

免费的网站请分享给朋友吧