Your cooling tower fan motor is running hot and is noisy.. after examining the motor, you discover that the bearings need replacement. The evidence you discovered was: ?
a. The motor was running on a single phase
b. The motor windings were faulty
c. You heard a noise that sounded like a bad bearing
d. The rotor was rubbing the stator
e. The gear reducer pinion shaft was misaligned
Answer: D
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Power Engineering Chapter 70
- Calcium sulphate scaling increases with:
- Sulphuric acid is used in the cooling tower to prevent?
- The rate of calcium bicarbonate breakdown and calcium carbonate scaling increases with:
- Crossflow towers:
- Dissolved solids build up in a closed cooling tower system as the water evaporates from the system. This buildup is controlled by:
- The average amount of water volume that evaporates from a cooling tower is:
- High discharge water temperature from the cooling tower could be caused by:
- Excessive wind velocity in a natural draft, cooling tower may cause:
- Natural draft cooling towers operate most effectively in large open spaces and:
- Organic growths also called _____ can reduce the flow rates in heat exchanger tubes and channels.
- Air flow in a natural draft cooling tower is dependent upon the:
- The principal cause of steel corrosion in cooling towers is:
- Natural draft cooling towers are divided into:
- The main scale forming substance in cooling water towers is:
- With all other factors being equal, a counter-flow cooling tower _____________ as a cross-flow cooling tower.
- Biological fouling in recirculating cooling water towers is caused by algae, _____ and bacteria growth.
- Scaling is not as severe in cooling towers when compared to boilers because:
- Air flow in a natural draft cooling tower is dependent upon the:
- A valve that bypasses water flow away from the fill of a cooling tower during cold weather should not be closed until the temperature reaches:
- To prevent cooling tower basin water from freezing during cold weather, many units:
- Water contained in the air stream at the discharge of a cooling tower is removed:
- The component of wood that is leached away reducing the ability of the wood to resist decay is the:
- The rate of heat transfer in any cooling tower system depends on the: