EXAMINATION 500

1. The first large-scale electrical air conditioning was invented and used in 1902 by ( a. Willis Carrier b. William Carrier c. Ron Gold star)

2. ATC means – 3. CAC means –

Important variables to keep in mind when estimating load for a room cooling installation:

4.5.6.7.8.9.

Classes of air conditioning10.11.12.13.

14.AHU means – 15.A ratio which indicates the degree of saturation of air with water vapor,

expressed as the ratio of the partial pressure of the actual water vapor in a mixture of, to the pressure of a saturated mixture at the same temperature. (a. Relative Humidistat b. Relative Humidity c. Humidity d. None of the above)

16.FCU means – 17.Means the maintenance of the atmospheric factors affecting comfort (a. Comfort

women b. Comfort air conditioning c. Climate control d. Both b&c)

The following variables are the maintenance of all within well objectionable noise in air-conditioning.

18.19.20.21.22.

23.An instrument used to determine the moisture content of the air. (a. Thermometer b. Moisture level instrument c. Psychrometer d. None of the above)

24.Amount of moisture in the air. (a humidity .b. Absolute humidity c. moisture d. None of the above)

The complete functions of an air conditioning system are:25.26.27.28.29.The number of times the air is changed per hour in a room (a. Air ventilation b.

Air vanes c. Air changes d. None of the above)30.This is actually located inside the house and contains the indoor coil, fan, motor,

and filtering device, sometimes called the air handler. (a.Accu b. Fan unit c. Indoor unit d. None of the above)

31.Refrigerant containing portion of a fan coil unit similar to a car radiator typically made of several rows of copper tubing with aluminum fins. (a. Indoor unit b. Indoor coil c. Indoor Fan d. None of the above)

32.Valve located at the outlet of the receiver tank. The liquid receiver valve. (a. Liquid valve b. King valve c. Vane valve d. None of the above)

33.Change of state from a liquid to a solid or liquid to a vapor that cannot be measured with a thermometer. (a. Moisture b. latent heat c. Vapor d. None of the above)

34.Flat blades in a register that can be turned to position that direct the airstreams. (a. Air foils vanes b. Air Float c. Air blades d. None of the above)

35.The amount of air required to completely replace the air in a room or a building. (a. Air replacement b. Air change c. Air vanes d. None of the above)

36.A rating that reflects the efficiency of gas furnace in covering fuel to energy. (a. Air Change b. Affu c. Afue d. None of the above)

Classification of air-conditioning (4 Major Categories)37.38.39.40.41.Assembly of equipment for the simultaneous control of air temperature, relative

humidity, purity and motion (a. Fan coil unit b. Air conditioner c. Affu d. None of the above)

42.Uses a fan to discharge heat from a condenser coil to the outdoor. (a. cooled b. Air diffuser c. Air movement d. None of the above)

43.Air distribution outlet or grille designed to direct airflow into desired patterns. (a. Air diffuser b. Air flow c. Air movement d. None of the above)

44.The distribution or movement of air. (a. Airflow b. Air diffuser c. Air movement d. None of the above)

45.Fan-blower, filter and housing parts of a system (a. Air handler b. Air diffuser c. Air movement d. None of the above)

46.Air is being used as the heat source or heat sink for a heat pump. (a. Heat source Air pump b. Air space c. Air source d. None of the above)

47.Luminous Bridge formed by in a gap between two conductors or terminals when they are separated. A spark. (a. Light b. Color c. Arc d. None of the above)

48.AXV means - 49. Refrigerant metering device operated by a low-side pressure of the system (a.

Freon b. AXV c. Dew)50.Steady voltage inserted in a series with an element of an electronic device. (a.

Device b. Steady voltage c. Bias d. None of the above)51.A unit in which direct expansion, or hydraulic coils, is located downstream of

supply fan. Compare with pull-through unit. (a. Blow-through unit b. Expansion valve c. Blow torch unit d. None of the above)

52.An air handling device for moving air in a distribution system. (a. Breathing system b. Blower fan c. Heat wall d. None of the above)

53.A unit that produces hot water or steam for heating (a. Furnace b. Boiler c. Heater d. None of the above)

54.A method such as the incremental system that has exterior wall opening for heat and moisture rejection and fresh air supply. (a. Breathing system b. Breathing wall c. Heat wall d. None of the above)

55.System in which air is treated at central location and carried to and from the rooms by one or more fans and a system of duct. (a. Integrated air conditioner b. Carrier air-conditioning c. Central Air conditioner System d. None of the above)

56.Amount of refrigerant placed in the refrigerating unit (a. Freon b. Charge c. Addition d. None of the above)

57.The refrigerated water used to call with air in air conditioning system (a. Chilled water b. Iced water c. Dry iced d. None of the above)

58.The range of temperature, humid and air velocities at which the greatest percentage of people feel comfortable. (a. Comfort area b. Comfort room c. Comfort zone d. None of the above)

59.The heart of an air conditioning or heat pump system. (a. Compressor b. Deflector c. Aircon pump d. None of the above)

60.A device that transfers unwanted heat out of the refrigeration system to a medium to absorb the heat and transfer it to a disposal unit. (a. Condenser b. Generator c. Fan d. None of the above)

61.Part of a refrigerating mechanism which pumps vaporized refrigerant from the evaporator, compresses it, liquefies in the condenser and returns it to a refrigerant control. (a. Condensing Unit b.Condensing Coil c. Condenser d. None of the above)

62.The ratio of the rate of useful heat output delivered by the complete heat pump unit to the corresponding rate of energy input, in consistent units and under operating conditions. (a. Coefficient of performance b. Coefficient of Production c. Coefficient of Energy d. None of the above)

63.A measure of the ability of a unit to remove the heat from an enclosed space. (a. Cooling incapacity b. Cooling capacitated c. Cooling capacity d. None of the above d. None of the above)

64.Produces high pressure Freon (a. Compression b. Condensing c. Condenser d. None of the above)

65.Liquefies high pressure Freon (a. Compression b. Condensing c. Condenser d. None of the above)

66.Found in ductwork, this movable plate opens and closes to control airflow. Dampers are used effectively in zoning to regulate airflow to certain rooms. (a. Vanes b. Ducts c. Damper d. None of the above)

67.The process of removing ice or frost buildup from the outdoor coil during the heating season. (a. Frosted ice b. Defrosted c. Defrost cycle d. None of the above)

68.The reduction of air vapors in water by cooling the air blow the dew point. (a. Dehumidification b.Humidification c. Toxicfication d. None of the above)

69.The temperature at which dew becomes water (a. Dew point b. Dew c. Moisture )70.A furnace that pulls in return air from the top and expels warm air at the bottom.

(a. Boiler b. Down flow furnace c. Flow furnace d. None of the above)71.The temperature of the air water vapor mixture as in the normal way with a

Fahrenheit thermometer (a. Dry Bulb Temp b. Dry temp c. Dry bulb d. None of the above)

72.The number of Fahrenheit degrees that the average outdoor temperature over a 24-hour period is less than 65 F. (a. Degree day b. Evaporation c. Finned tube d. None of the above)

73.Absorbs heat as Freon becomes a gas. (a. Degree day b. Evaporation c. Finned tube d. None of the above)

74.Used for heat transfer between water and air. (a. Degree day b. Evaporation c. Finned tube d. None of the above)

75.Carbon monoxide, Carbon dioxide and the like (a. Gas b. Fide gas c. Fde gas d. None of the above)

76.A pipe or closed conduit made of sheet of metal, fiberglass board, or other suitable material used or conducting air to form an air handling unit.(a. Duct b. Duct work c.Duct pipe d. None of the above)

77.Pipes or channels that carry air throughout your home. a. Duct b. Duct work c.Duct pipe d. None of the above)

78.The quantity of heat in BTU per minute in a fluid or gas (a. Enthalpy b. Air conditioning c. Heating d. None of the above)

79.Heat content or total heat, including both sensible and latent heat. The amount of heat contained in a refrigerant at any given temperature with reference to 40-F. (a. Enthalpy b. Air conditioning c. Heating d. None of the above)

80.A device to vaporize water, and to use it to increase the relative humidity of air (a. Humidifier b. Infiltration c. Primary air d. None of the above)

81.Cold air that leaks in (a. Humidifier b. Infiltration c. Primary air d. None of the above)

82.Heated or cooled air directly from the conditioner. (a. Humidifier b. Infiltration c. Primary air d. None of the above)

83.As applied to air systems, the difference in temperature of the return air and the heated air delivered. (a. Temp rise b. Temp drop c. Temp d. None of the above)

84.The difference in temperature of the return air and the cooled air delivered. (a. Temp rise b. Temp drop c. Temp d. None of the above )

85.A device for removing dust particles from air or unwanted elements from liquid. (a. Screen b. Air removal c. Filter d. None of the above d. None of the above)

86.Refrigerant gas means (a. Ice b. Vapor c. Freon d. None of the above)87.The amount of heat measured in BTU’s, from a space to be conditioned, and the

local summer outdoor design temperature and a specified indoor design condition. (a. Heat gained b. Heat exchanger c. Heat drop d. None of the above)

88. Is the architectural term referring to all equipment in the following categories: plumbing, air conditioning, heating, gas fitting, and electrical? (a. Mechanical room b. Mechanical equipment c. Hvac room d. None of the above)

Lift performance depends on the following:89.90.91.92.93.94.Are lifted by ropes, which pass over a wheel attached to an electric motor above

the elevator shaft. (a. Traction elevators b. Wheeled elevator c. Roped elevator d. None of the above)

2 Types of traction elevators95.   96.

97.A device designed to regulate humidity input by reacting to changes into the moisture content of the air. (a. Humidifier b. Humidistat c. Moisture humidifier d. None of the above)

98.Are typically traction elevators that do not have a dedicated machine room above the elevator shaft? (a. Machine-room-less elevators b. Shaft less elevator c. Traction less elevator d. None of the above)

99. Is a piece of equipment built for efficient heat transfer from one medium to another? The media may be separated by a solid wall, so that they never mix, or they may be in direct contact. (a. Heat transfer b Heat contact. c. Heat exchanger d. None of the above)

100. A furnace that lies on its sides, pulling in return air from one side and expelling warm air from the other. (a. Sided furnace b. Horizontal Furnace c. Pulling furnace d. None of the above)