Chapter 21 Flashcards
With the following is/are, the determining factors affecting heat transfer in a cooling tower.
A. Relative velocity of both air and water during contact.
B. Area of water surface in contact with the air.
C. Length of contact time between the air and water.
D. All of the above.
D
Atmospheric towers are used in areas that have ___ space.
A. Relatively constant winds and large open spaces.
B. Economical supply of electricity.
C. No need for a large cooling water supply and return temperature differential.
D. Economical supply of cooling water.
A
What is one advantage of the Venturi style cooling tower related to noise?
a) Increased noise levels
b) Quietness of operation due to the absence of any moving parts
c) Noise reduction due to special soundproof materials
d) Reduced noise due to high-speed fans
B
What basin temperature is required prior to allowing full water flow over the tower fill?
A. 10°C
B. 15°C
C. 27°C
D. 20°C
C
What is the cause of a cooling tower motor turning in the wrong direction?
a) Overheating of the motor
b) Incorrect lubrication
c) Wrong sequence of phases
d) Faulty motor bearings
C
How does the Venturi style cooling tower affect electrical requirements?
a) Increases the need for electrical connections
b) Requires complex electrical connections and starters
c) Eliminates the need for electrical connections and starters
d) Reduces electrical consumption by 50%
C
What component is eliminated in the Venturi style cooling tower, simplifying its design?
a) Fans
b) Fill
c) Pumps
d) Cooling fins
B
What maintenance benefit does the Venturi style cooling tower offer?
a) Increased maintenance requirements b) No need for regular maintenance
c) Reduced maintenance requirements d) Requires specialized maintenance
C
What is the remedy for a cooling tower motor turning in the wrong direction?
a) Replace the motor
b) Lubricate the motor bearings
c) Change any two of the three motor leads
d) Tighten the motor bolts
C
