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 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 : Through what is feed water from hot-well is passed through, before entering steam and water drum in Lamont boiler? a. Evaporator tubes b. Economizer c. Distributor header d. Circulating pump
Last Answer : b. Economizer
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 : Which cooling Towers use a process similar to the one found in small evaporation active cooling units a) hyperbolic b) Tower c) condensate loop d) none of these
Last Answer : a) hyperbolic
Description : Presence of moisture in fuel oil would (A) Keep the burner tips cool (B) Aid in proper combustion (C) Because sputtering, possibly extinguishing flame (D) Clean the nozzles
Last Answer : (D) Clean the nozzles
Description : In what is water in high pressure boiler circulated through? • Conduits • Cove • Channel • Tubes
Last Answer : • Tubes
Description : The water tubes in a simple vertical boiler are _______ a. Horizontal b. Vertical c. Inclined d. All of the above
Last Answer : c. Inclined
Description : Fire tube boilers are those in which a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy
Last Answer : a) Flue gases pass through tubes and water around it
Description : Water tube boilers are those in which a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy
Last Answer : b) Water passes through the tubes and flue gases around it
Description : The diameter of internal flue tubes of a Lancashire boiler is about _______ that of it’s shell a. One fourth b. One third c. Two fifth d. One half
Last Answer : c. Two fifth
Description : The diameter of fine tubes in Cochran boiler is of order of _______ a. 2cm b. 6cm c. 8cm d. 15cm
Last Answer : b. 6cm
Description : Locomotive boiler has a) 137 fire tubes and 44 superheated tubes b) 147 fire tubes and 34 superheated tubes c) 157 fire tubes and 24 superheated tubes d) 167 fire tubes and 14 superheated tubes
Last Answer : c) 157 fire tubes and 24 superheated tubes
Description : Size of boiler tubes is specified by a) Mean diameter and thickness b) Inside diameter and thickness c) Outside diameter and thickness d) Outside diameter and inside diameter
Last Answer : c) Outside diameter and thickness
Description : Where is water steam separator drum located in Lamont boiler ? a. Inside of the boiler b. Right above the furnace c. Before the feed water pump d. Outside the boiler
Last Answer : d. Outside the boiler
Description : Through which does the even circulation of water is possible in Lamont boiler ? a. Nozzles b. Water trough c. Feed pump d. Hose
Last Answer : a. Nozzles
Description : What is called as the heart of the Lamont boiler? a. Water drum b. Centrifugal pump c. Furnace d. Blower
Last Answer : b. Centrifugal pump
Description : Water that is fed back to the boiler by the pump is called? a. Absorber b. Absolute c. Compressor d. Condensate
Last Answer : d. Condensate
Description : Cooling Towers vary from size of 40 metres to a) 400 b) 120 c) 450 d) 560
Last Answer : a) 400
Description : How many cooling towers are there near a reactor a) 1 b) 4 c) 5 d) 2
Last Answer : b) 4
Description : Oxygen trim control strategy __ a. continuously measures the oxygen content in the flue gas b. adjusts the combustion air flow c. Continually tuning the air-fuel mixture. d. All of above
Last Answer : d. All of above
Description : How is water circulated throughout the dry cooling tower system? a. Finned tubes b. Metal pipes c. Porous tubes d. Swifting tubes
Last Answer : a. Finned tubes
Description : How is water circulated throughout the dry cooling tower system? A] Finned tubes. B] Metal pipes C] Porous tubes. D] Swirling tubes
Last Answer : A] Finned tubes.
Description : An economiser in a boiler........ A]Increases steam pressure. B]Increases steam flow C]Decreases fuel consumption D]Decreases steam pressure
Last Answer : C]Decreases fuel consumption
Description : Which of these is an output of a ‘Furnace’? a. Fuel gas b. Cool Air c. Flue gases d. Water Vapor
Last Answer : c. Flue gases
Description : Find false statement about effect of sulphur in fuel? (A) It has heating value (B) It helps in electrostatic precipitation of ash in flue gases (C) It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low (D) It erodes furnace walls
Last Answer : (D) It erodes furnace walls
Description : In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is (A) 0.007 bar (B) 0.053 bar (C) 0.06 bar (D) 0.067 bar
Last Answer : (D) 0.067 bar
Description : Green coal, in order to be burnt, must be (A) Heated sufficiently (B) Burnt in excess air (C) Heated to its ignition point (D) Burnt as powder
Last Answer : (C) Heated to its ignition point
Description : Combustion is the ideal air/fuel ratio where a. the mixing proportion is correct, b. the fuel is completely burned c. the oxygen is entirely consumed d. All of the above
Last Answer : d. All of the above
Description : Based on the exhaust gas analysis, a controller maintains stoichiometric combustion __ a. by commanding a servo motor to adjust the combustion air damper b. By commanding servo motor to adjust the fuel supply valve. c. Both a. & b. d. None of the above.
Last Answer : c. Both a. & b.
Description : Detecting and monitoring carbon monoxide assures the air/fuel ratio is not too rich as a. The excess air is trimmed b. Excess air is let out c. Both a. & b. d. None of above
Last Answer : a. The excess air is trimmed
Description : It is easy to detect and monitor excess air a. As oxygen not used for combustion is heated and discharged with the exhaust gases. b. Oxygen is discharged without heating c. Both a. & b. d. None of above
Last Answer : a. As oxygen not used for combustion is heated and discharged with the exhaust gases.
Description : Use of ______ is prohibited in process boilers. a. Use of a common gas b. combustion air control linkage c. jack shaft d. All of the above
Description : For process boilers , combustion air fans must meet the following requirements ___ a. The fan motor shall be driven by a variable speed drive b. The fan motor shall include controls that limit the fan motor demand to no more than 30 %. c. Both a. & b. d. None of the above
Description : A flue damper and a vent damper are two examples of _______ a. Combustion air positive shut off devices b. Combustion air negative shut off devices c. Both a. & b. d. None of the above
Last Answer : a. Combustion air positive shut off devices
Description : Combustion air positive shut-off shall be provided on all newly installed _______ a. Grant boilers b. Process boilers c. Worcester boilers d. All of the above
Last Answer : b. Process boilers
Description : What is the function of boiler? • To burn the fuel in a confined closed system With the supply of air • To generate steam in varying pressure • To generate steam at constant pressure • To produce flue gases by burning fuel at a given pressure
Last Answer : • To generate steam at constant pressure
Description : What happens when air dissolves in condensate? a) non corrosive b) temperature of air increases c) corrosive d) none of above
Last Answer : c) corrosive
Description : Can a cooling tower cool water below the wet bulb temperature of inlet air? (A) Yes (B) No (C) Yes; but height of cooling tower will be prohibitively high (D) Yes; but the air flow rate should be excessively high
Last Answer : (B) No
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 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 : The propulsion of water into steam drum by extremely rapid, almost explosive boiling of water at the heating surface is called ___________ a) Foaming b) Priming c) Corrosion d) Caustic embrittlement
Last Answer : b) Priming
Description : A safety valve usually employed with stationary boilers is (A) Lever safety valve (B) Dead weight safety valve (C) High steam and low water safety valve (D) All of these
Last Answer : (D) All of these
Description : When the bubbles of steam are produced? • Once the water reaches saturation temperature • Once the water starts evaporating • Once the temperature decreases • None of the above
Last Answer : • Once the water reaches saturation temperature
Description : Find the wrong statement. • Boiler is used to produce electricity in the energy business. • Boiler is used to produce steam for generating electricity. • Boiler can pressurize the water and can also evaporate it. All are wrong.
Last Answer : • Boiler can pressurize the water and can also evaporate it.
Description : Which of the following is not a type of boiler? • Fire tube boiler • Water tube boiler • Cast iron boiler • Hot water boiler
Last Answer : • Hot water boiler
Description : A boiler or steam generator is a device used to create steam by applying heat energy to _____. • Water • Petrol • Oil • All of the above
Last Answer : • Water
Description : ……… is excellent carrier of heat a) Water b) steam c) solid d) None of above
Last Answer : b) steam
Description : If the water level inside the boiler were not carefully control cased… a) explosion b) overheat and fail c) both a) & b) d) None of above
Last Answer : c) both a) & b)
Description : Feed water usually at…… °C temperature. a) 70 b) 120 c) 1000 d) 80
Last Answer : d) 80