Description : Which type of cooling towers operate through a chimney or stack ___ a. Cross flow b. Counter flow c. Hyperbolic d. All of above
Last Answer : Hyperbolic
Description : In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the __________ number. (A) Lewis (B) Grashoff (C) Sherwood
Last Answer : (A) Lewis
Description : Wet cooling towers operate on the principle of ............... A Condensation. B Evaporative Cooling C Both of the above D None of the above
Last Answer : B Evaporative Cooling
Description : 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
Last Answer : B] Evaporative cooling
Description : 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
Last Answer : three
Description : Common applications of Cooling towers include a. Cooling the circulating water used in oil refineries b. petrochemical and other chemical plants c. thermal power stations d. All of the above.
Last Answer : All of the above.
Description : Which one of the following fill material is more energy efficient for cooling towers in case of sea water cooling? • Splash fill • Film fill • Low clog film fill • None of the above
Last Answer : Film fill
Description : In hyperboloid cooling towers the material is filled at 1. Tower’s bottom 2. Tower’s top 3. Near tower 4. None of above
Last Answer : Tower’s top
Description : How many times chlorination must be carried out for cooling towers 1. Twice a year 2. Once a year 3. Thrice a year 4. None of above
Last Answer : Twice a year
Description : How does the flow of air occur in natural draught cooling towers? a) Natural pressure head density between cold outside air and humid inside air b) Variation in pressure of both cold outside air and ... given air vents and vacuum ports d) Because of difference in the volume of both the of airs
Last Answer : Natural pressure head density between cold outside air and humid inside air
Description : Thermal efficiencies up to........have been observed in hybrid cooling towers a. 92 b. 82 c. 72 d. 62
Last Answer : 92
Description : . Improved cooling efficiency and minimum usage of material are the key features of ______ a. Natural draft cooling towers b. Cross flow towers c. Hyperbolic cooling d. All of above
Last Answer : Hyperbolic cooling
Description : . _____ type of cooling towers are used with nuclear power plants. a. Cross flow b. Natural draft c. Hyperbolic d. None of above
Description : Hyperbolic cooling towers are also referred as a. Natural draft towers b. Cross flow towers c. Hyperboloid towers d. None of the above
Last Answer : Hyperboloid towers
Description : . ______ type of cooling towers are structurally strong. a. Counter flow towers b. Hyperbolic towers c. Cross flow towers d. None of the above
Last Answer : Hyperbolic towers
Description : The hyperboloid cooling towers are often associated __ a. with nuclear power plants b. Used in some coal-fired plants c. In some large chemical and other industrial plants. d. All of the above.
Last Answer : All of the above
Description : Hyperbolic cooling towers have become design standard for all natural draft structural towers because usage of . a. Their structural strength b. Minimum usage of material. c. Improving cooling efficiency d. All of the above.
Description : Natural draft cooling towers are mainly used in the _____. • Steel industry • Fertilizer industry • Alumina industry • Power stations
Last Answer : Power stations
Description : The hyperbolic cooling towers are associated with ……. and …….. power plants. a) electrical, thermal c) thermal, nuclear b) nuclear, electrical d) none of above
Last Answer : thermal, nuclear
Description : Hyperbolic cooling towers are made up of high height reinforced ………structure. a) plastic c)metal b) alloy d) concrete
Last Answer : concrete
Description : . Most cooling towers are capacity rated at a "standard" wet bulb temperature of ___of • 72°F • 52°F • 78°F • 75°F
Last Answer : 78°F
Description : __________ Cooling towers have become the design standard for all natural-draft cooling towers because oftheir structural strength and minimum usage of material. • HCT • CCT • Hyperboloid • None
Last Answer : Hyperboloid
Description : 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
Last Answer : 200&100
Description : 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
Last Answer : 4&5
Description : 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
Last Answer : a. 200&100
Description : . 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
Last Answer : b. 4&5
Description : Pick out the wrong statement. (A) Mechanical agitation is required, if the system has low interfacial tension (B) Sieve tray towers are generally used for systems having low ... Prandtl analogy for heat and mass transfer considers the transfer through both laminar and turbulent layers
Last Answer : (A) Mechanical agitation is required, if the system has low interfacial tension
Description : 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
Last Answer : b. Pollutants
Description : Consider the diurnal (daily) cycle of temperature at the surface. Why is the tem- perature maximum in the mid-to-late afternoon? (a) There is a net energy gain at the surface from dawn to mid- ... this time. (d) Late in the day, evaporation from the surface increases and this cools the surface.
Last Answer : There is a net energy gain at the surface from dawn to mid- afternoon.
Description : Describe construction and working of closed cycled gas turbine.
Last Answer : Construction: In above figure shows a closed cycle gas turbine which consists of compressor, heating chamber gas turbine which drives the generator, compressor and a cooling chamber. ... is cooled at constant pressure with the help of circulating air is circulated through compressor.
Description : Firm that operate internationally are able to A. earn a greater return from their skills and core competencies B. realize location economies where they can be performed most efficiently C. realize greater experience curve economies, which reduces the cost of production D. All the above
Last Answer : All the above
Description : Entry criteria' should address questions such as I. Are the necessary documentation, design and requirements information available that will allow testers to operate the system and judge correct behavior. II. Is the test environment-lab, ... B. I, II and III C. I, II, III and IV D. II, III and IV.
Last Answer : A. I and II only
Description : In kidney failure condition urea can be removed by ____process.
Last Answer : In kidney failure condition urea can be removed by ____process.
Description : A __________ is a type of heat exchange system where water is heated to its' boiling point via combustion of a fuel blown through a tube submerged in water. a. Condensate loop b. Hyperbolic cooling tower c. Steam boiler d. All of above
Last Answer : c. Steam boiler
Description : Water entrained by circulating air in cooling towers is termed as (A) Drift (B) Blow down (C) Vapor load (D) None of these
Last Answer : (A) Drift
Description : What Are The Factors That Affect The Rate Of Evaporation Of Water In Cooling Towers?
Last Answer : Amount of water surface area exposed. The time of exposure. The relative velocity of air passing over the droplets. The RH of air. The direction of airflow relative to water.
Description : What are built to cool down the cooling water in a power plant 1 Towers 2 Cooling pond 3 Air filter 4 non of these
Last Answer : 1 Towers
Description : Cooling towers are rated in terms of A. approach B. range C. both of the mentioned D. none of the mentioned
Last Answer : ANSWER :C
Description : Why cooling towers require in the Steam power plant ?
Last Answer : Cooling towers cool the warm water discharged from the condenser and feed the cooled water back to the condenser. There are two types of cooling methods provided in the cooling towers, they can be either ... finned tubes over which cooling air is passed. Heat is rejected to air as water is cooled
Description : What is the working principle of Cooling Towers?
Last Answer : The hot water is sprayed from the top of the tower, while the air is made to flow from the bottom of the tower to the top. This air cools the hot water in the cooling tower. Air vaporises ... and leaves at the top of the tower and cooled water leaves at the bottom and recirculated to the condenser.
Description : What is meant by cooling Towers?
Last Answer : It is a tower or building like device in which atmospheric air circulates in direct or indirect contact with warmer water and water is thereby cooled. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid
Description : Pick out the wrong statement. (A) With decrease in feed temperature, the number of plates required for binary distillation decreases for a given L/V' ratio (B) The extraction per unit ... and its crosssection is wider at the bottom (D) Vander wall adsorption is also called chemisorption
Last Answer : (D) Vander wall adsorption is also called chemisorption
Description : Pick out the wrong statement pertaining to the cooling towers. (A) In case of induced draft cooling tower, the fan is placed at the top of the tower (B) Effectiveness of ... Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature
Last Answer : (D) Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature
Description : Air intake for an air compressor should be preferably taken from (A) A site, where cooling towers are located nearby (B) A site, where open coal yard in located nearby (C) An air conditioned room maintained at a temperature of 18°C (D) An outside atmosphere at 10°C
Last Answer : (D) An outside atmosphere at 10°C
Description : How The Dry Type Cooling Towers Are Classified?
Last Answer : The dry type cooling towers are classified into two types ‘as follows: 1. Indirect dry type (or) Heller cooling system 2. Direct dry type-cooling system
Description : How Mechanical Draft Cooling Towers Are Classified?
Last Answer : Mechanical draft cooling tower is classified into three types: 1. Forced draft tower. 2. Induced draft counterflow tower. 3. Induced draft cross flow tower.
Description : How The Atmospheric (or) Natural Draught Cooling Towers Are Classified?
Last Answer : In atmospheric (or) natural cooling towers, the natural air provides the required cooling without the use of fans. This is classified into three types: 1. Natural draft spray filled towers. 2. Natural draft packed type towers. 3. Hyperbolic cooling towers.
Description : Name Different Types Of Cooling Towers?
Last Answer : The cooling towers are classified as follows. According to the construction of material: 1. Timber for small tower 2. Ferro concrete for large capacity stations. 3. Multi deck concrete towers for ... air draught: 1. Atmospheric (or) Natural draught cooling system 2. Mechanical draught cooling tower.