Which of the following statements regarding cooling tower operations is correct?
A) When the water evaporates from the wet-bulb thermometer, the temperature rises.
B) On very dry days, the cooling tower can cool the water below the wet-bulb temperature.
C) On dry days, the cooling tower can cool the water temperature below the ambient temperature.
D) The cooling tower operation depends on the dry-bulb temperature.
[Ques. 2] How can you reduce the chances of check valves getting stuck?
A) Lubricate the check valves. B) Install backup check valves.
C) Use a ball-style check valve. D) Use a flapper-style check valve.
[Ques. 3] Which type of electric space heater is often used in office and home settings for uniform room temperature control?
A) Forced-air electric space heaters B) Convection baseboard electric space heaters
C) Suspended-force fan-unit electric space heaters D) Cabinet-type electric space heaters
[Ques. 4] Propane is:
A) Heavier than air.
B) About the same density as air.
C) Either lighter or heavier than air depending on the characteristics of the local gas.
D) Lighter than air.
[Ques. 5] Many central system chillers use water-cooled condensers because:
A) Water-cooled chillers take up less space inside the building than air-cooled chillers.
B) The compressor can be located almost anywhere inside the building.
C) Water-cooled condensers require less maintenance than air-cooled condensers.
D) Air-cooled condensers contribute more to global warming.
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