Which of the following statements regarding mechanical-draft cooling towers is correct?
A) Counterflow towers are shorter and wider than crossflow towers.
B) Three fans are required for a forced-draft crossflow cooling tower.
C) Cross flow cooling towers may be used for indoor applications.
D) Only one fan is required for an induced-draft counterflow tower.
[Ques. 2] What does the pressure drop across the coaxial coil tell the technician?
A) The water flow through the system
B) The amount of refrigerant charge
C) A pressure drop across the coaxial coil indicates a refrigerant restriction.
D) A pressure drop across the coaxial coil indicates a restriction in the water loop.
[Ques. 3] The three types of gas space heaters are:
A) Vented, unvented, and catalytic.
B) Low pressure, medium pressure, and high pressure.
C) Natural gas, propane, and kerosene.
D) Category I, category II, and category III.
[Ques. 4] What is the type of gas that is created as a byproduct of other manufacturing processes?
A) Manufactured gas B) Natural gas C) Liquid petroleum D) Propane
[Ques. 5] What applications are best suited for console through the wall PTAC units?
A) Large retail stores B) Hotels and motels
C) Grocery stores D) Sound recording studios
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