Description : Cooling tower effectiveness is the ratio of a) Range/( Range + approach) b) Approach/(range + approach) c) Range /(range - approach) d) Approach/ /(range - approach)
Last Answer : Range/( Range + approach)
Description : A better indicators for cooling tower performance is _____. • Wet bulb temperature • Dry bulb temperature • Range • Approach
Last Answer : Approach
Description : The ratio of dissolved solids in circulating water to the dissolved solids in makeup water is called a) Liquid gas ratio b) Cycle of concentration c) Cooling tower effectiveness d) None of the above
Last Answer : Cycle of concentration
Description : The ratio of dissolved solids in circulating water to dissolved solids in makeup water is called. • Liquid gas ratio • Cycle of concentration • Cooling tower effectiveness • None of the above
Description : Normally the guaranteed best approach a cooling tower can achieve is _____. • 5°C • 12°C • 8°C • 2.8°C
Last Answer : 2.8°C
Description : L/G ratio in a cooling tower is a ratio of _____. • Length and girth • Length and temperature gradient • Water flow rate and air mass flow rate • Air mass flow rate and water flow rate
Last Answer : Water flow rate and air mass flow rate
Description : In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Which one of the following is true to estimate the range of cooling tower? a) Range = cooling water inlet temperature - wet bulb temperature b) Range = cooling water outlet temperature - wet bulb temperature ... = heat load in kcal per hour / water circulation in lines per hour d) None of the above
Last Answer : Range = heat load in kcal per hour / water circulation in lines per hour
Description : Cooling efficiency of a cooling tower is significantly affected under cross-wind condition and might decrease to……… in the range of moderate to high wind velocity condition. a) 50% c) 25% b) 75% d) 90%
Last Answer : 75%
Description : Which of the following faction affect the cooling tower performance? • The range • Heat load • Wet bulb temperature • All of the above
Last Answer : All of the above
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 : The term "approach" in a cooling tower refers to the difference in the temperature of the (A) Cold water leaving the tower and the wet bulb temperature of the surrounding air (B ... (C) Hot water entering and the cooled water leaving the cooling tower (D) None of these
Last Answer : (A) Cold water leaving the tower and the wet bulb temperature of the surrounding air
Description : Carnot cycle efficiency depends upon (a) properties of the medium/substance used (b) condition of engine (c) working condition (d) temperature range of operation (e) effectiveness of insulating material around the engine.
Last Answer : Answer : d
Description : Pollution caused by cooling tower includes 1. Fouling 2. Limestone formation 3. Corrosion 4. All of above
Last Answer : All of above
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 : Which among the following are the components of natural draft cooling tower a) Supply basin b) reinforced concrete c) Hot water distribution d) none of the above
Last Answer : reinforced concrete
Description : In the natural draft cooling tower_________ is not required a) Fan b) tower c) Nozzle d) none of the above
Last Answer : Fan
Description : In natural draft cooling tower the air flow is obtained by___________ a) Difference in air pressure b) difference in air temperature c) Difference in air speed d) none of the above
Last Answer : Difference in air pressure
Description : Cooling tower is a ______device a) Heat absorption b) heat rejection c) Both a and b c) neither a nor b
Last Answer : heat rejection
Description : Natural draft cooling tower are mainly used in a) Steel Industry b) Alumina industry c) Fertilizer industry d) Power station
Last Answer : Power station
Description : How is air produced in mechanical draught cooling tower? a) Air Tuyeres b) Propeller fans c) Air blowers d) Louvre
Last Answer : Propeller fans
Description : In which system is Cooling of hot water is done on tray as step by? a) Mechanical draught cooling system b) Hyperbolic cooling tower c) Atmospheric cooling tower d) Wet cooling tower
Last Answer : Atmospheric cooling tower
Description : Which of the following is the simplest method of cooling the condenser water? • Spray cooling pond • Cooling tower • Indirect air cooling • Hyperbolic cooling tower
Last Answer : Spray cooling pond
Description : In which system is Cooling of hot water is done on tray as step by? a. Mechanical draught cooling system b. Hyperbolic cooling tower c. Atmospheric cooling tower d. Wet cooling tower
Description : The first hyperbolic cooling tower was built in... a. 1916 b. 1917 c. 1918 d. 1919
Last Answer : 1918
Description : The ……….-induced response of cooling tower is the key factor to improve safety and to reduce tower crack. a) wind c) heat b) water d) steam
Last Answer : wind
Description : The first hyperboloid shaped cooling tower was introduced by the Dutch engineers Frederik van Iterson andGerard Kuypers and built in ……….. a) 1918 c) 1919 b) 1870 d) 1920
Description : . In which system is Cooling of hot water is done on tray as step by? a) Mechanical draught cooling system b) Hyperbolic cooling tower c) Atmospheric cooling tower d) Wet cooling tower
Description : In cooling tower ,higher temperature __________ corrosion potential • Decrease • Increase • Temperature has no effect on corrosion
Last Answer : Increase
Description : In ________ cooling tower there is no direct contact between the water and Air. • Dry type • Evaporative type • Once through • All of the above
Description : When sizing a cooling tower the highest anticipate__________ should be used? • Dry bulb • Wet bulb • Both dry and wet bulb • None of the above
Last Answer : Wet bulb
Description : The pollutants that are present depend on __________ building material, as well. • Cooling tower • Water tower • Steam tower • Fire tower
Last Answer : cooling water
Description : How do you service a cooling tower? • Ensure Proper Airflow. . Clean Your Tubes. • Inspect the Water Pump. • All of above
Last Answer : all of above
Description : . 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
Description : A ______ is a specialized heat exchanger in which air and water are brought into direct contact with each otherin order to reduce the water's temperature. a. Cooling tower b. Heating tower c. Both d. All are wrong
Last Answer : cooling tower
Description : How do you service a cooling tower? • Ensure Proper Airflow. Clean Your Tubes. • Inspect the Water Pump. • All of above
Description : 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
Last Answer : d. All of above
Description : Heat load in a cooling tower (A) Means the amount of heat thrown away (KCal/hr.) by the cooling tower (B) Is equal to the number of kg, of water circulated times the cooling range (C) Both (A) & (B) (D) Neither (A) nor (B)
Description : The term "cooling range" in a cooling tower refers to the difference in the temperature of (A) Cold water leaving the tower and the wet bulb temperature of the surrounding air (B) Hot water entering the ... air (C) Hot water entering the tower and the cooled water leaving the tower (D) None of these
Last Answer : (C) Hot water entering the tower and the cooled water leaving the tower
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 : Pick out the wrong statement (A) A horizontal line on the humidity chart indicates the temperature changes at constant molal humidity (B) When water is cooled from 80 to 70°C by exposure ... & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure
Last Answer : (D) Relative saturation of unsaturated mixture of water vapor & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure
Description : Pick out the wrong statement. (A) Different solids have different equilibrium moisture curves (B) Total condenser or reboiler is considered equivalent to one theoretical plate in McCabe-Thiele method of ... (D) Even a forced draft cooling tower cannot cool water below the wet bulb temperature
Last Answer : (C) Heat removal load on cooler remains constant, even with increase of the reflux ratio in a distillation column
Description : __________ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower. (A) Sherwood (B) Stanton (C) Lewis (D) Peclet
Last Answer : (C) Lewis
Description : The macroscopic approach to the study of thermodynamics does not require a knowledge of the behavior of individual particles is called _____. A. Dynamic thermodynamics B. Static thermodynamics C. Statistical thermodynamics D. Classical thermodynamics
Last Answer : Classical thermodynamics
Description : . _____ type of cooling towers are used with nuclear power plants. a. Cross flow b. Natural draft c. Hyperbolic d. None of above
Last Answer : Hyperbolic
Description : The cooling water reduces the water temperature close to _____. • Dry bulb temperature • Ambient wet bulb temperature • Dew point temperature • None of the above
Last Answer : Ambient wet bulb temperature
Description : Natural draft cooling towers are mainly used in the _____. • Steel industry • Fertilizer industry • Alumina industry • Power stations
Last Answer : Power stations
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 : 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