Emerging Trends in Mechanical Engineering

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2.3 Hyperbolic Cooling towers

1   Which of the following is the simplest method of cooling the condenser water?
    (A)   Spray cooling pond
    (B)   Cooling tower
    (C)   Indirect air cooling
    (D)   Hyperbolic cooling tower

2   Open cooling system is also called as ____________
    (A)   Parallel system
    (B)   Once through system
    (C)   Air based system.
    (D)   Non-reversible system

3   What type of cooling system is used in the large power plants?
    (A)   Cooling ponds
    (B)   Natural flow system
    (C)   Cooling towers.
    (D)   Single deck system

4   Wet cooling towers (or open circuit cooling towers) operate on the principle of……………
    (A)   Condensation.
    (B)   Evaporative cooling
    (C)   Both of the above
    (D)   None of the above

5   How does outside air enter into the wet cooling system?
    (A)   Air vents
    (B)   Louvers.
    (C)   Tuyeres
    (D)   Vacuum

6   How is water circulated throughout the dry cooling tower system?
    (A)   Finned tubes.
    (B)   Metal pipes
    (C)   Porous tubes.
    (D)   Swirling tubes

7   Why is exhaust steam coming out of turbine is admitted to a steam header?
    (A)   To increase the pressure.
    (B)   To decrease the velocity
    (C)   To decrease the pressure drop.
    (D)   To control the pollution

8   How is air produced in mechanical draught cooling tower?
    (A)   Air Tuyeres.
    (B)   Propeller fans
    (C)   Air blowers.
    (D)   Louvre

9   Hyperbolic cooling towers generally used in the
    (A)   Steel industry
    (B)   Fertilizer industry
    (C)   Alumina industry
    (D)   Power industry

10   Design of hyperbolic cooling tower standard for all cooling tower
    (A)   Mechanical draft
    (B)   Natural draft
    (C)   Both a & b
    (D)   Neither a & b

11   Beams of hyperbolic cooling towers are made up of
    (A)   Tungsten
    (B)   Iron
    (C)   Stainless steel
    (D)   Brass

12   Natural draft in hyperbolic cooling towers reduces —— of fans.
    (A)   Damage
    (B)   Efficiency
    (C)   Cost
    (D)   Speed

13   Hyperbolic design allows for use of ——- without sacrificing structural integrity.
    (A)   Minimum material
    (B)   Maximum material
    (C)   High quality material
    (D)   Low quality material

14   Following is not the advantage of hyperbolic design
    (A)   Less maintenance cost
    (B)   Less initial cost
    (C)   Less noise
    (D)   All of the above

15   Following is advantage of hyperbolic design
    (A)   Less initial cost
    (B)   Less noise
    (C)   Less vibration
    (D)   All above

16   Hyperbolic cooling towers used in
    (A)   Coal-fired power plant
    (B)   Nuclear plants
    (C)   Thermal power plant
    (D)   All of these

17   Natural draft in hyperbolic cooling tower is used for production of
    (A)   Fertilizer
    (B)   Steel
    (C)   Chemical
    (D)   Electrical energy

18   When vapour is cooled at constant total system volume, the _______ changes.
    (A)   Volume
    (B)   PRESSURE
    (C)   Temperature
    (D)   None of the mentioned

19   Approximately about________ of cooling in cooling tower is through the sensible cooling
    (A)   5%
    (B)   80%
    (C)   20%
    (D)   40%

20   Condensation starts at ________ point.
    (A)   Dew
    (B)   Bubble
    (C)   Triple
    (D)   none of the mentioned

21   In which type of cooling system are nozzle arranged on different elevation?
    (A)   Single deck system
    (B)   Double deck system
    (C)   Natural flow system
    (D)   Direct flow system

22   The exhaust steam coming out of turbine is admitted to a steam header to
    (A)   Increase the pressure
    (B)   decrease the pressure
    (C)   decrease the pressure drop
    (D)   control the pollution

23   Wet cooling towers operate on the principle of……………
    (A)   Condensation
    (B)   Evaporative Cooling
    (C)   Both of the above
    (D)   None of the above

24   The open cooling is also called as?
    (A)   Parallel system
    (B)   Once through system
    (C)   Air based system
    (D)   Nonreversible system

25   Which one of the following the maximum effect on cooling tower performance
    (A)   Fill media
    (B)   Drift
    (C)   Lourvers
    (D)   Casing

26   How many number of spray nozzle does each module on spray pond cooling system contain?
    (A)   1
    (B)   2
    (C)   3
    (D)   4

27   Which of the following is the simplest method of cooling the condenser water?
    (A)   Spray cooling pond
    (B)   Cooling tower
    (C)   Indirect air cooling
    (D)   Hyperbolic air cooling

28   In which type of cooling pond system are nozzles arranged on same elevation?
    (A)   Single deck system
    (B)   Double deck system
    (C)   Natural flow system
    (D)   Direct flow system

29   What are used in the direct flow system to transfer the pond batch uniting at intake?
    (A)   Separators
    (B)   Filters
    (C)   Baffle walls
    (D)   Porous pipes

30   What type of cooling system is used in the large power plants?
    (A)   Cooling ponds
    (B)   Natural flow system
    (C)   Cooling towers
    (D)   Single deck system

31   How is water circulated throughout the dry cooling tower system?
    (A)   Finned tubes
    (B)   Metal pipes
    (C)   Porous tubes
    (D)   Swifting tubes

32   Which of the following gives out highest pollutants to the atmosphere?
    (A)   cooling tower
    (B)   water tower
    (C)   steam tower
    (D)   fire tower

33   What comes out from the cooling tower of a nuclear power plant?
    (A)   smoke
    (B)   cool air
    (C)   hot air
    (D)   none of theses

34   What are built to cool down the cooling water in a power plant?
    (A)   Towers
    (B)   Cooling pond
    (C)   Air filter
    (D)   none of these

35   What are present depend on cooling tower building material as well
    (A)   pollution
    (B)   population
    (C)   dust
    (D)   none of these

36   Why is exhaust system coming out of the turbine is admitted to a steam header
    (A)   to increase the pressure
    (B)   to increase the velocity
    (C)   to decrease the pressure
    (D)   to increase the velocity

37   Which of the following is a fissile fuel?
    (A)   carbon
    (B)   potassium
    (C)   thorium
    (D)   graphite

38   How is air produced in mechanical cooling tower?
    (A)   air fan
    (B)   propeller fans
    (C)   air blowers
    (D)   propeller blowers

39   _______ cooling towers use a process similar to the one found in small evaporative cooling units.
    (A)   Hyperboloid
    (B)   Tower
    (C)   Condensate loop
    (D)   None

40   Hyperboloid cooling towers have become the design standard for all _______draft cooling towers because of their structural strength and minimum usage of material.
    (A)   Natural
    (B)   Induce
    (C)   Force
    (D)   None

41   The hyperboloid shape also aids in accelerating the upward convective air flow, improving __________ efficiency.
    (A)   Heating
    (B)   Warming
    (C)   Cooling
    (D)   Cold

42   The __________ that are present depend on cooling tower building material, as well. Cooling towers are built of concrete, wood, plastic or metal.
    (A)   Heat
    (B)   Pollutants
    (C)   Cold
    (D)   All of Above

43   There are _______main types of cooling towers that are defined by how water or air passes through them.
    (A)   One
    (B)   Two
    (C)   Three
    (D)   Four

44   A ______ is a specialized heat exchanger in which air and water are brought into direct contact with each other in order to reduce the water’s temperature.
    (A)   Cooling tower
    (B)   Heating tower
    (C)   Both
    (D)   All are wrong

45   How can we increase the efficiency of a cooling tower?
    (A)   Save energy.
    (B)   Reduce the amount of water being consumed.
    (C)   Decrease the amount of chemicals required for water treatment.
    (D)   All of above

46   There are two huge cooling towers close to building site of reactor __ and __ of the Chernobyl Power Plant.
    (A)   1 & 3
    (B)   4 & 5
    (C)   2 & 5
    (D)   1 & 4

47   Cooling towers vary in size from small roof-top units to very large hyperboloid structures that can be up to ____ meters tall and _____ meters in diameter, or rectangular structures that can be over 40 meters tall and 80 meters long.
    (A)   200 & 100
    (B)   100 & 50
    (C)   200 & 50
    (D)   200 & 150

48   How do you service a cooling tower?
    (A)   Ensure Proper Airflow.
    (B)   Clean Your Tubes.
    (C)   Inspect the Water Pump.
    (D)   All of above

49   The hyperboloid shape also aids in accelerating the upward convective air flow, improving ________ efficiency.
    (A)   Performance
    (B)   Cooling
    (C)   Heating
    (D)   All of the above

50   __________ Cooling towers have become the design standard for all natural-draft cooling towers because of their structural strength and minimum usage of material.
    (A)   HCT
    (B)   CCT
    (C)   Hyperboloid
    (D)   None

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