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1、轮机英语1530. Keep compartment_ as the gas given off can be dangerous.A. well ventilated B. well clean C. in good order D. more room1531. The cooler as the liquid becomes, _.A. the faster it will evaporate B. the slower it will condenseC. the slower it will evaporate D. the faster it will flow1532. The
2、heat used to change a liquid to a vapor is called_.A. latent heat of fusion B. latent heat of vaporizationC. specific heat of vaporization D. latent heat of the gas1533. The temperature _ a liquid changes its state from liquid to gas dependsupon the liquid itself and upon the pressure _ it is subjec
3、ted in the containingvessel.A. at which/to which B. from which/at which C. to which/from which D. in which/on which1534. Air conditioning is the process of treating air to control _ its temperature,humidity, cleanliness and distribution to meet the comfort requirements of theoccupants of the conditi
4、oned space.A. instantaneous B. instantaneously C. simultaneous D. simultaneously1535. One of the functions of ventilation is to_ the humidity of spacescontaining sources of moisture, or to_ the temperature of spaces notmechanically cooled such as the engine room.A. increase/reduce B. reduce/increase
5、 C. increase/increase D. reduce/reduce1536. _ is the control of temperature and humidity in a space together with thecirculation, filtering and refreshing of the air.A. Refrigeration B. Air conditioning C. Ventilation D. Heating1537. _ is the circulation and refreshing of the air in a space without
6、necessarilya change of temperature.A. Refrigeration B. Air conditioning C. Ventilation D. Heating1538. _ is used for sensing the temperature of the room in the air condition system.A. An expansion valve B. An evaporator C. A thermostat D. A condenser1539. Water evaporates or steam condenses at the s
7、aturation temperature, whichdepends upon the pressure, the higher the pressure _ the saturation temperature.A. the more B. the higher C. the lower D. the highest1540. The shutter of the evaporator was blocked with_, it means there was too much evaporation.A. ice B. wooden board C. iron plate D. cott
8、on waste1541. The quantity of cooled air delivered by an air conditioning unit should_轮机英语the sum of the quantity of air re-circulated to the unit and the quantity mechanicallyexhausted.A. balance B. not balance C. be more than D. be less than1542. In the process of_, liquid changes into gas.A. evap
9、oration B. frosting C. condensing D. compressing1543. In extreme weather conditions, either hot or cold, control of the airconditioning plant presents_ difficulties.A. few B. little C. a little D. less1544. Most air conditioning units have_ for adjusting the ratio of recirculatedfresh air. Care must
10、 be taken not to reduce the fresh air so that stuffiness or smellsarise.A. catch plates B. dampers C. regulating valves D. fans1545. For the intermediate condition, thermostats must be correctly set _.A. by trial and error B. by and large C. automatically D. very easily1546. The process of removing
11、moisture from air is known as _.A. humidification B. dehumidification C. vaporization D. evaporation1547. If air at 95oC dry bulb temperature and 50% relative humidity is conditionedto 75oC dry bulb temperature and 50% relative humidity, it is an example of _.A. cooling only B. cooling and humidifyi
12、ng C. cooling and dehumidifying D. adiabatic cooling1548. Increasing the moisture content of conditioned air is known as_.A. moisturizing B. dehumidification C. dampening D. humidification1549. The sum of the sensible heat and the latent heat of any substance is known as_.A. total heat B. residual h
13、eat C. specific heat D. superheat1550. The heat identified by only a change in temperature is known as_.A. sensible heat B. latent heat C. total heat D. residual heat1551. In reference to air conditioning, when air attains the maximum amount ofmoisture it can hold at a specific temperature, it is sa
14、id to be_.A. superheated B. saturated C. condensed D. convected1552. Which of the following factors will have the greatest effect on the heating loadwithin a conditioned space?A. Solar gain. B. Infiltration and ventilation air.C. Occupants inside the space. D. Entertainment equipment within the spac
15、e.1553. The dew point of air is reached when the wet bulb temperature is_.A. Twice the dry bulb temperature B. 10oC above the dry bulb temperatureC. 5oC above the dry bulb temperature D. Equal to the dry bulb temperature1554. The temperature at which water vapor in the atmosphere begins to condense is轮机英语called the_.A. dew point temperature B. condensation temperatureC. psychometric temperature D. absolute humidity temperature1555. The he
