ACR-106 Unit 48 Cooling Towers & Pumps

If the blower on a cooling tower breaks down on a hot day, the ____.

• approach temperature will increase

• water supplied to the condensers will be warmer

• efficiency of the tower will increase

• Both a and b.

The heat that the cooling tower must reject from the water in the chiller is the cooling load of the conditioned area plus the heat of ____.

• absorption

• compression

• vortexing

• cavitation

Cooling towers are designed to reduce the entering water temperature to within ____°F of the air's wet-bulb temperature.

• 3

• 7

• 14

• 35

When sizing a cooling tower, the tower is sized to handle the cooling load of the conditioned area plus about ____% for heat of compression.

• 0

• 15

• 25

• 35

A new chemical-free water purification technology is used in cooling towers to ____.

• avoid vortexing

• balance the water flow

• eliminate scale

• All of the above.

The term ____ refers to the process of cooling the circulating condenser water by evaporating the tower water.

• cyclic

• adiabatic

• isothermal

• polytropic

Natural draft towers and spray ponds are designed to produce a difference in water and air temperatures of ____°F.

• 3

• 5

• 7

• 10

Two methods used to aid the evaporation rate of water in a forced or induced draft tower are ____.

• vortexing and cavitation

• spray pond and prevailing wind

• float type valve and by-pass valve

• splash and wetted-surface (or fill)

A blowdown system for a cooling tower ____.

• reduces the concentration of sediment in the sump

• provides extra draft for higher evaporation rate

• promotes vortexing

• provides a means for balancing the water flow

The purpose of the cooling tower bypass valve is to ____.

• route debris away from the tower sump

• prevent cavitation at the pump

• provide makeup water to the tower sump

• help maintain the correct water temperature to the condenser