When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.

相似题目

• The humidifier’s valve of air-condition should be （）, when the temperature is lower than 0℃.

  A . A.decreased B . B.increased C . C.fixed D . D.closed

  查看最佳答案

• The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）

  A . Cross B . Parallel C . Counter D . Circular

  查看最佳答案

• The dew point of air is reached when the wet bulb temperature is （）.

  A . Twice the dry bulb temperature B . 10℃ above the dry bulb temperature C . 5℃ above the dry bulb temperature D . Equal to the dry bulb temperature

  查看最佳答案

• 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 （）

  A . decrease B . increase C . decrease to zero D . remain unchanged

  查看最佳答案

• When carrying a cargo of asphalt or molten sulfur，which are carried at temperatures of over 300°F，one of the biggest dangers is（）.

  A . water in the tanks or pipelines B . having the cargo too cool C . explosion of vapors after discharge D . inadequate ullage space

  查看最佳答案

• When considering the lowest fuel system operating temperature, （） are important.

  A . specific gravity or relative density B . open flash point and closed flash point values C . higher calorific and lower calorific values D . cloud point and pour point value

  查看最佳答案

• The humidifier’s valve of air-conditioner should be （）, when the temperature is 5~8°C in the winter.

  A . decreased B . increased C . fixed D . closed

  查看最佳答案

• The amount of heat released by steam when it changes to water at the same temperature is called（）.

  A . latent heat of condensation B . latent heat of vaporization C . latent heat of saturation D . sensible heat of condensatio

  查看最佳答案

• （）is a type of fog occurring close to the sea surface when the air is dry and cold-probably at least 9℃ below the sea surface temperature.

  A . MIXING FOG B . ADVECTION FOG C . RADIATION FOG D . ARCTIC SEA SMOKE

  查看最佳答案

• 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 （）.

  A . superheated B . saturated C . condensed D . convected

  查看最佳答案

• In the latter half of the 16th century, a form of drama arose in France called “French Light and Shadow”, which caused a great sensation when it was staged in Paris and Marseilles.

  查看最佳答案

• When the temperature is below zero， water will _______.

  查看最佳答案

• When taking exercise, food, fluid or other activities, the agencies should be measured temperature in

  查看最佳答案

• Conceived when he was in college and now in the 28th year of operation, Smith's exquisite brainchildhas become the standard for door-to-door package delivery.(Para. 1, L10)

  查看最佳答案

• （In) warm-blooded animals, their body temperature, regardless of the temperature of the an

  (In) warm-blooded animals, their body temperature, regardless of the temperature of the animals' (surroundings), (are) maintained within narrow (limits). A．In B．surroundings C．are D．limits

  查看最佳答案

• You can see the ball __ when the temperature is high.

  A.expand B.extend C.stretch

  查看最佳答案

• So, in the evening when the body temperature is beginning to fall, there is a natural ten______ to fall asleep and in the morning, when the temperature begins to rise rapidly, we are most likely to wake up.

  查看最佳答案

• The humidifier’s valve of air-condition should be ____, when the temperature is lower than 0°C.

  A.decreased B.increased C.fixed D.closed

  查看最佳答案

• Never is one supposed to do exterior painting when the temperature is below 50 degrees ℉.

  A．Y B．N C．NG

  查看最佳答案

• 1 In 1959 Americans welcomed Alaska into the Union as the 49th state, symbolizing a change of attitude from that held in 1867, when the peninsula was purchased from Russia. Then, most Americans had little interest in 1,500,000 square kilometers "of icebergs and polar bears" - beyond Canada's western borders, far from the settled areas of the United States.

  2 In those sections of the state which lie above the Arctic Circle, Alaska still is a land of icebergs and polar bears. Ice masses lie buried in the earth, which is permanently frozen to a depth of 90 or more meters. From early May until early August, the midnight sun never sets on this flat, treeless region, but the sun cannot melt the icy soil more than two - thirds of a meter down. 3 Alaska is America's largest state, but only about 325,000 people live there. According to estimates, 800,000 hectares of its land area are fit for plowing but only about 640,000 hectares are being cultivated. 4 Arctic Alaska has been the home of Eskimos for countless centuries. It is believed that the Eskimos moved there from Mongolia or Siberia, probably crossing Bering Strait, named for Vitus Bering, the Danish sea captain who discovered Alaska on his voyage for Russia in 1741. The Eskimos are the state's earliest known inhabitants5. Russian fur traders established settlements but, by the time Alaska was sold to the United States, most of the traders had departed. 5 In 1896 gold was discovered near the Klondike River in Canada just across the Alaskan border. Thousands of Americans rushed to the region on their way to Klondike; some never returned. Alaska was never completely cut off again, although even today transportation is a major problem. There are only two motor routes from the US mainland, and within the state, every town has its own airfield. Planes fly passengers, mail and freight to the most distant villages. 6 The gold that changed life so suddenly for Alaska was soon ended, and although many stories about mining camps have become part of American literature, the gold from Alaskan earth contributed less to economic progress than the fish from Alaskan waters. The fish caught in a single year range in value from $80 million to $90 million. Fur-bearing animals are plentiful in the forests and streams, and valuable fur seals inhabit the waters. After fishing, the state's chief industry is lumber and the production of wood pulp. In recent years, Alaska's single most important resource has become oil. The state also has large deposits of coal, copper, gold and other minerals. A Rich Resources of the State B Connections with the Outside World C Transportation Problem D The Natives of the Land E Cold Climate F Land and Population Paragraph 3 ______

  查看最佳答案

• In the long run, when the economy is at full employment, will a decrease in the quantity of money due to restrictive monetary policy that brings a decrease in aggregate demand likely result in:Th

  A．No No B．No Yes C．Yes No

  查看最佳答案

• You are on a tanker discharging oil．When all of th...

  You are on a tanker discharging oil．When all of the oil that the main cargo pumps can handle is pumped out of a tank，the remainder is ______． A.Stripped out and pumped directly ashore into the mainline as the remaining cargo tanks are pumped out with the main pumps B.Stripped to one tank and then pumped out with the main pumps C.Stripped out and pumped directly ashore after all the tanks have been emptied by the main pumps D.Gravitated to the centers from the wings and pumped out with the main pumps

  查看最佳答案

• When was the first case of AIDS in the world discovered in the 20th Century（）

  A．1960s B．1970s C．Early 1980s D．Late 1980s E．1990s

  查看最佳答案

• The himalayan allele in rabbits produces dark fur at the extremities of the body—on the nose, ears, and feet. The dark pigment develops, however, only when a rabbit is reared at a temperature of 25°C

  A．temperature-sensitive allele B．dominance C．discontinuous characteristic D．genetic imprinting E．phenocopy

  查看最佳答案