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
[showhide type=”button7c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
2   Open cooling system is also called as ____________
    (A)   Parallel system
    (B)   Once through system
    (C)   Air based system.
    (D)   Non-reversible system
[showhide type=”button7c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
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
[showhide type=”button7c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
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
[showhide type=”button7c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
5   How does outside air enter into the wet cooling system?
    (A)   Air vents
    (B)   Louvers.
    (C)   Tuyeres
    (D)   Vacuum
[showhide type=”button7c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
6   How is water circulated throughout the dry cooling tower system?
    (A)   Finned tubes.
    (B)   Metal pipes
    (C)   Porous tubes.
    (D)   Swirling tubes
[showhide type=”button7c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button7c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
8   How is air produced in mechanical draught cooling tower?
    (A)   Air Tuyeres.
    (B)   Propeller fans
    (C)   Air blowers.
    (D)   Louvre
[showhide type=”button7c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
9   Hyperbolic cooling towers generally used in the
    (A)   Steel industry
    (B)   Fertilizer industry
    (C)   Alumina industry
    (D)   Power industry
[showhide type=”button7c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
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
[showhide type=”button7c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
11   Beams of hyperbolic cooling towers are made up of
    (A)   Tungsten
    (B)   Iron
    (C)   Stainless steel
    (D)   Brass
[showhide type=”button7c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
12   Natural draft in hyperbolic cooling towers reduces —— of fans.
    (A)   Damage
    (B)   Efficiency
    (C)   Cost
    (D)   Speed
[showhide type=”button7c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
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
[showhide type=”button7c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button7c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
15   Following is advantage of hyperbolic design
    (A)   Less initial cost
    (B)   Less noise
    (C)   Less vibration
    (D)   All above
[showhide type=”button7c15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
16   Hyperbolic cooling towers used in
    (A)   Coal-fired power plant
    (B)   Nuclear plants
    (C)   Thermal power plant
    (D)   All of these
[showhide type=”button7c16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
17   Natural draft in hyperbolic cooling tower is used for production of
    (A)   Fertilizer
    (B)   Steel
    (C)   Chemical
    (D)   Electrical energy
[showhide type=”button7c17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
18   When vapour is cooled at constant total system volume, the _______ changes.
    (A)   Volume
    (B)   PRESSURE
    (C)   Temperature
    (D)   None of the mentioned
[showhide type=”button7c18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
19   Approximately about________ of cooling in cooling tower is through the sensible cooling
    (A)   5%
    (B)   80%
    (C)   20%
    (D)   40%
[showhide type=”button7c19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
20   Condensation starts at ________ point.
    (A)   Dew
    (B)   Bubble
    (C)   Triple
    (D)   none of the mentioned
[showhide type=”button7c20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button7c21″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
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
[showhide type=”button7c22″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
23   Wet cooling towers operate on the principle of……………
    (A)   Condensation
    (B)   Evaporative Cooling
    (C)   Both of the above
    (D)   None of the above
[showhide type=”button7c23″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
24   The open cooling is also called as?
    (A)   Parallel system
    (B)   Once through system
    (C)   Air based system
    (D)   Nonreversible system
[showhide type=”button7c24″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
25   Which one of the following the maximum effect on cooling tower performance
    (A)   Fill media
    (B)   Drift
    (C)   Lourvers
    (D)   Casing
[showhide type=”button7c25″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
26   How many number of spray nozzle does each module on spray pond cooling system contain?
    (A)   1
    (B)   2
    (C)   3
    (D)   4
[showhide type=”button7c26″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
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
[showhide type=”button7c27″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button7c28″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button7c29″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
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
[showhide type=”button7c30″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
31   How is water circulated throughout the dry cooling tower system?
    (A)   Finned tubes
    (B)   Metal pipes
    (C)   Porous tubes
    (D)   Swifting tubes
[showhide type=”button8c1″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
32   Which of the following gives out highest pollutants to the atmosphere?
    (A)   cooling tower
    (B)   water tower
    (C)   steam tower
    (D)   fire tower
[showhide type=”button8c2″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
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
[showhide type=”button8c3″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button8c4″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
35   What are present depend on cooling tower building material as well
    (A)   pollution
    (B)   population
    (C)   dust
    (D)   none of these
[showhide type=”button8c5″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button8c6″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
37   Which of the following is a fissile fuel?
    (A)   carbon
    (B)   potassium
    (C)   thorium
    (D)   graphite
[showhide type=”button8c7″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
38   How is air produced in mechanical cooling tower?
    (A)   air fan
    (B)   propeller fans
    (C)   air blowers
    (D)   propeller blowers
[showhide type=”button8c8″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
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
[showhide type=”button8c9″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button8c10″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
41   The hyperboloid shape also aids in accelerating the upward convective air flow, improving __________ efficiency.
    (A)   Heating
    (B)   Warming
    (C)   Cooling
    (D)   Cold
[showhide type=”button8c11″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
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
[showhide type=”button8c12″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
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
[showhide type=”button8c13″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]
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
[showhide type=”button8c14″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button8c15″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
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
[showhide type=”button8c16″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
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
[showhide type=”button8c17″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: A [/showhide]
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
[showhide type=”button8c18″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: D [/showhide]
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
[showhide type=”button8c19″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: B [/showhide]
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
[showhide type=”button8c20″ more_text=”Show Answer” less_text=”Hide Answer”] Answer: Option: C [/showhide]

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