Tpc 435 Flashcards
The capacity of the condenser is affected by?
Area of contact with the cooling medium
Natural-draft air-cooled condensers and forced air condensers are alike in that both types…
Depend on air circulating over the coils
Low-ambient control in air-cooled condensers can be achieved by?
Closing the dampers
Spring loaded relief valves protect a system against explosion by acting in response to high ____ . Fusible plugs act in response to high _____ .
- Pressure
- Temperature
Periodic maintenance of air-cooled condensers includes doing which of the following every three months?
Checking all belts and pulleys
In a ______ system, water passes through the condenser to cool the refrigerant, the waste water is then…
- Waste water
- Discharged to the sewer
In a water cooled condenser system, makeup water is used for?
Replacing water lost through evaporation
Tube-in-tube, shell-and-coil, and shell-and-tube condensers are alike in the following way?
Liquid refrigerant collects at the bottom of the condenser
A condenser has a pressure relief device that ______ if the refrigerant pressure becomes too high.
Releases refrigerant
Generally, how long should you allow a chemical cleaner to stand in a condenser?
A few hours
Which of the following can increase the capacity of a cooling tower or a spray pond by the greatest amount?
Increase in air velocity across the surface
What type of cooling tower is shown?
Induced draft, counter flow
Which components in the water-circulating system for a cooling tower or a spray pond are used to keep the concentration of minerals low?
Bleed off valve
The capacity of a cooling tower can be controlled by means of a?
Diverting valve
As part of maintaining a cooling tower, you should check the _________ everyday.
Float valve for clogging
The basic classifications for evaporative condensers are?
Blow through, and draw through
An evaporative condenser may include a desuperheating coil for the purpose of?
Reducing the formation of scale
Which of the following methods will maintain condensing pressure during cold weather operation?
Circulating water intermittently
What will prevent the water in an evaporative condenser from freezing during cold weather?
Installing a sump heater
As part of maintaining an evaporative condenser you should check the ______ every three months.
Fan blades for tightness
One of the main categories of water related problems in an air condition or refrigeration system is?
Corrosion
Corrosion in a water cooled system can be caused by?
Biological organisms
Scale formation can be reduced in a refrigeration system by adding ____ to the cooling water
Acid
Bacteria and algae can be controlled in a refrigeration system by adding ______ to the cooling water
Chlorine
Chemical deterioration in a wooden cooling tower can be controlled by?
Keeping the P.H. of circulating water in the 6 to 7.5 range
