158/2015

Maximum: 100 marks Time: 1 hour and 15 minutes

1. In the fire tube boilers:


(A)The hot gases pass through tubes and water surrounds the tubes


(B)The water passes through the tubes and hot gases surround the tubes


(C)Fire surrounds the tubes and water passes in the tubes


(D)All of the above


2. Lancashire boiler is


(A)Internally fired boiler


Externally fired boiler


(C)Forced circulation boiler


Water tube boiler


3. Which of the following is a fire tube boiler?


(A)Stirling boiler


(B)Babcox and Wilcox boiler


(C)Velox boiler


(D)Locomotive boiler


4. Natural circulation type boiler works on the principle of:

(A)Differential density of hot and cold water


(B)Differential density of hot and cold water at chimney


(C)Natural draught system with Chimney


(D)None


5. In locomotive boiler maximum pressure is the order of:


bar


bar


bar


(D)100 bar


6. Which of the following are classified as high pressure steam boiler?


(A)Loeffler boiler


Benson boiler


mont boiler


(D)All of the above


7. Stirling steam boiler has:


(A)One steam drum, two water drums


(B)Two steam drums, two water drums


(C)Three steam drums, two water drums


drums


8. Equivalent evaporation as referred to steam generators is

(A)Quantity of steam produced per kg of fuel


(B)Quantity of steam produced from water at 100° C to dry saturated steam at 100°C


(C)Quantity of steam produced from water at ambient conditions to dry saturated steam at rated pressure of boiler


(D)None of the above


9. Which of the following boilers used LPG as fuel?


(A)Manning boiler


(B)Integral furnace boiler


(C)BENT tube boiler


All of the above


10. Which of the these boilers works in the temperature range below 100°C:


(A)Integral furnace boiler


Stirling boiler


(C)Waste heat boiler


All of the above


11. The functions of the following fitting is to extinguish boiler furnace fire in case of water level falling below safe level


(A)Feed check valve


Blow off cock


(C)Safety valve


Fusible plug


12. Which of these safety valves is used in locomotive and marine engines?


(A)Dead weight safety valve


Spring loaded safety valve


(C)Lever safety valve


All of the above


13. Which of these boiler fitting is used to control the supply of water to the boiler and to prevent the escaping of water from the boiler when the pump pressure is less?


(A)Feed check valve


Stop valve


(C)Safety valve


Blow off cock


14. The function of the following fitting in boiler is to regulate the flow of steam from one steam pipe to other:


(A)Feed check valve


Safety valve


(C)Blow off cock


Stop valve


15. The function of the following fitting in a boiler is to prevent the pressure exceeding the maximum limit:


(A)Feed check valve


Blow off cock


(C)Safety valve


Fusible plug


16. Which of these component on the boiler is used to recover the waste heat of the flue gases for heating feed water?


(A)Super heater


Economiser


(C)Pre heater


Fusible plug


17. Which of these component on the boiler is used to increase the temperature steam above saturation temperature?

(A)Air pre heater


Economiser


(C)Super heater


None


18. Function of a steam separator:

remove the entrained water particles from the steam conveyed to steam engine


increase the temperature of the steam above saturation point


increase the temperature of air before it enters the furnace


(D)All the above


19. Which of the following as referred to steam boiler are defined as mountings?

(A)Safety valve


Economiser


(C)Water level indicator


Stop valve


20. Which of these boiler fitting is used to inject feed water into the boiler?

(A)Injector


Feed pump


(C)Both of them


None of them


21. Draught produced by chimney is described as:

(A)Induced draught


Natural draught


(C)Forced draught


Balanced draught


22. Artificial draught is produced by


(A)Induced fan


Forced fan


(C)Induced fan and forced fan


All of the above


23. For locomotive boilers the draught is produced by

(A)Forced fan


Chimney


(C)Steam jet


Only motion of locomotive


24. For the same draught produced the power of induced draught fan as compared to forced draught fan is:


(A)More


(B)Less


(C)Same


(D)Not predictable



25. The artificial draught is normally designed to produce:

(A)More draught


(B)Less smoke


(C)Less chimney gas temperature


All of the above


26. The location of fan for induced draught is

(A)Near bottom of chimney


Near bottom of furnace


the top of the chimney


Anywhere permissible


27. For maximum discharge of hot gases through the chimney, the height of the hot gas column producing draught is


(A)Twice the height of the chimney


Equal to the height of the chimney


(C)Half the height of the chimney


None of the above


28. The pressure at the furnace is minimum in case of:

(A)Forced draught system


Induced draught system


(C)Balanced draught system


Natural draught system


29. Chimney efficiency is approximately:













30. Artificial draught is produced by

(A)Air fans


(B)Steam jet


(C)Fan jet


(D)All the above


31. Equivalent evaporation as referred to steam generator mean:

(A)Quantity of dry saturated steam generated per kg of fuel at rated pressure


(B)Quantity of steam generated per hour at rated pressure


(C)Quantity of dry saturated steam generated at I bar from water at 100°C


(D)Quantity of dry saturated steam generated from water at S.T.P


32. Boiler efficiency is defined as

(A)Ratio of heat output to heat input


Ratio of heat input to heat output


(C)Heat input


Heat output


33. Factor of evaporation as referred to boiler:

Actual evaporation in kg/hr

Equivalent evaporation in kg/hr



Equivalent evaporation in kg/hr

Actual evaporation in kg/hr



(C)Dryness fraction of steam produced


(D)(I-Dryness fraction) of steam produced



34. The main objectives of boiler trail is to


(A)Determine its dryness fraction


(B)Determine its efficiency


(C)Determine its capacity


(D)Determine both efficiency and capacity


35. Evaporation ratio is defined as

Quantity of steam generation

Quantity of fuel consumption



Quantity of fuel consumption

Quantity of steam generation



1

Quantity of fuel consumption



1

Quantity of steam generation


36. Boiler turn down is defined as

(A)Ratio between full boiler output and boiler output when operating at high fire


(B)Full boiler output


(C)Ratio between full boiler output and boiler output when operating at low fire


(D)None of the above


37. When was Indian boiler regulations created?

(A)15th October 1931


(B)15th September 1930


(C)23rd February 1923


(D)None of the above


38. Which steam boiler are regulated by Indian boiler regulation?


(A)Any closed vessel exceeding 22.75 litres capacity which is used for generating steam


(B)Any closed vessel exceeding 10.75litres capacity which is for generating steam


(C)Any closed vessel exceeding 15 litres capacity which is for generating steam


(D)None of the above


39. Define the boiler terminology MCR:


(A)Maximum concentration rating


Maximum rating


(C)Maximum continuous rating


None of the above



40. What is combustion space in a boiler?

is the furnace volume in cubic metres per kg of fuel


is the furnace volume in cubic metres


is the furnace volume in cubic metres per kg of fuel fired per hour


is the furnace volume in meter square per kg of fuel fired per hour


41. The transformation from solid to gas phase is called:

(A)Vapourisation


(B)Condensation


(C)Boiling


Sublimation


42. Which increase in pressure the boiling point of water?

(A)Increases


Decreases


not change


None of the above


43. Super heated steam is


(A)Steam at a temperature below boiling point of water


(B)Steam at a temperature above boiling point of water


(C)Steam at boiling point of water


(D)None of the above


44. At triple point:

(A)Ice on heating becomes super heated vapour


(B)Solid, liquid and vapour co-sent


(C)Ice occupies maximum specific volume


(D)Liquid water, dry saturated steam co-sent


45. Dryness fraction is defined as


Mass of dry steam/ Mass of water vapour is suspension


Mass of water vapour in suspension Mass of dry steam


(C)Mass of dry steam/ Man of dry steam of mass of water vapour in suspension


(D)Mass of water vapour in suspension /Mass of water vapour in suspension mass of dry steam


46. Saturated steam 100% dry contains:


latent heat


latent heat


(C)Sensible heat


latent heat


47. If a steam water content is its dryness fraction is

95%








None of the above


48. The energy content of steam is called:

(A)Entropy


(B)Density


(C)Specific volume


(D)Enthalpy


49. The end point of the pressure-temperature curve that designates condition under which a liquid and its vapour can co-sent?


(A)Triple point


Ice point


(C)Critical point


None of the above


50. Only throttling calorimeter is used for measuring:


(A)Very low dryness fraction up to 0.7


(B)Very high dryness fraction up to 0.98


(C)Dryness fraction of only low pressure steam


(D)Dryness fraction of only high pressure steam


51. Air at 20°C and 101.325 kpa is called:

(A)STP


(B)NTP


(C)ISA


(D)SATP


52. Which of these is a solid fuel?

(A)Anthroate


(B)Gasoline


(C)Paraffin


(D)Town gas


53. Calorific valve ofAnthroate is approximately:


(A)12000 KJ/kg


14000 KJ/kg


(C)1000 KJ/kg


35600 KJ/kg


54. Calorific value of determined at constant volume:

equal to calorific value of fuel at constant pressure


more than the calorific value of fuel at constant pressure


less than the calorific value of fuel at constant pressure


(D)May be more or may be less depending upon molecular contraction or expansion of the products of combustion


55. The calorific valve of hydrogen/kg when burnt at constant pressure in atmosphere of air as compared to that burnt at constant volume is


(A)Less


(B)More


(C)Equal


(D)May be more or less


56. Bomb calorimeter is used to determine the calorific value of:

(A)Solid fuels only


(B)Liquid fuels only


(C)Both solid and liquid fuels


(D)Gaseous fuel


57. Junker's calorimeter is used to determine the calorific value of:

(A)Gaseous fuels only


Solid fuels only


(C)Liquid fuels only


None of the above


58. Bomb calorimeter determines:


(A)Higher calorific value of fuels at constant pressure


(B)Lower calorific value of fuels at constant pressure


(C)Higher calorific value of fuels at constant volume


(D)Lower calorific value of fuels at constant volume


59. IDtimate analysis of fuel means determination of:

(A)Higher calorific value of fuel


(B)Lower calorific value of fuel


(C)Percentage of carbon, hydrogen, nitrogen, sulphur and phosphorus


(D)Percentage of fixed carbon, ash, volatile matter and moisture


60. The higher heating value of natural gas is:

(A)9350 Kcal/Nm3


(B)31900 Kcal/Nm3


(C)21300 Kcal/Nm3


5000 Kcal/Nm3


61. The oxygen by volume in air is:














62. The Nitrogen by volume in air is:














63. The amount of air required for complete combustion of fuel is called:

(A)Excess air


(B)Free air


(C)Stoichiometric air


None of the above


64. For ideal combustion process for burning 1kg of a typical fuel containing 86% carbon, 12% hydrogen and sulphur, the theoretically required quantity of air


(A)15kg


(B)10kg


(C)12.5 kg


(D)14.1 kg


65. Free oxygen in the products of combustion is an indication of:


(A)Stoichiometric air


Minimum air


(C)Excess air


(D)None of the above


66. Orsat apparatus is used to determine:


(A)Products of all constituents of fuel combustion by weight


(B)Products of all constituents of combustion of fuel by volume


(C)Products of only dry constituents of combustion by weight


(D)Products of only dry constituents of combustion by volume


67. Which of these devices can be used to detect leaks in boilers:


(A)ultrasonic transmitter


Leak detector fluid


(C)Micromanometer


None of the above


68. If gravimetric analysis of products of combustion is known, Air; fuel ratio is given by

CxN2/0.23CO2 +0.33CO


CxN2/0.21CO2 +0.33CO


CxN2/0.33CO2 0.21CO


CxN2/0.33CO2 0.23CO


69. Volumetric analysis of sample of dry products of combustion are CO2 10% CO O2 N2= The proportion by weight are given by:





(B)44:28:256:2268


(C)22:14:256:2268


(D)22:14:128:2268



70. C CO2 Therefore 1kg of carbon requires how much kg of oxygen?


(A)1.67


(B)2.67


(C)3.67


(D)4.67


71. The S.I unit of length is

(A)Millimeter


(B)Centimeter


(C)Meter


(D)Inch


72. Which of these is the unit of power?

(A)Watts


(B)Joules/sec


(C)Both and


(D)None of them


73. 1 Pascal is how much N m2?

1N/m2


1 bar


2N/m2


None of them


74. Which of these is used to measure temperature?


(A)Micrometer


(B)Pyrometer


(C)Infrared thermometer


(D)Both and


75. Mechanical equivalent of heat is related to


(A)Conservation of mass


(B)Conservation of energy


(C)Conservation of momentum


(D)None of the above


76. The localised corrosion caused by oxygen in boilers is called:

(A)Scaling


(B)Pitting


(C)Erosion


(D)None of the above


77. Which of these equipment is used for boiler water treatment?

(A)Pyrometer


(B)Micrometer


(C)Dearator


(D)None of the above


78. What is the recommended hardness of boiler feed water?

(A)Less than 5 ppm


(B)Greater than 5 ppm


(C)Greater than 1 ppm


(D)Less than 1 ppm


79. When the total amount of sludge under a boiler is high, which of these methods is employed for the removal of sludge?

(A)Coagulation


(B)Dispersion


(C)Both and


(D)None of them


80. Which of these treatment is used for boilers which operate at low or moderate pressures?

(A)Evaporation


Dearation


(C)Membrane contractors


Internal treatment


81. Largest planet:

(A)Mercury


(B)jupiter


(C)Venus


(D)Pluto


82. South west monsoon season in India is between:

(A)June to August


(B)October to November


(C)June to July


(D)April to May


83. The first annual session of SNDP yogam having been held at


1914


1908


1903


1904


84. Grips Mission arrived in the year:

1946


1944


1942


1940


85. Present Lok Sabha speaker:

Sumitra Mahagan


Meera Kumar


Venkayya Naidu


Somanath Ghattergi


86. Largest river island:

(A)Kuruvadeep


Mangalavanam


Gosrreethuruth


Majuli


87. National flower of Russia:

(A)Narssissas


Rose

Sunflower


Lotus


88. The year 1942 is marked with:

(A)Wagon Tragedy


(B)Punnapra-Vayalar Incident


Symon commission


Temple entry proclamation


89. Eagle is the National Emblem of:

(A)Turkey


(B)Mangolia


(C)Poland


(D)Spain


90. World Bookday is celebrated on:

(A)March 23


(B)April23


(C)December 10


(D)January 26



91. Sahodara Sangham was founded by K.Ayyappan in

1907


1908


1914


1917


92. Name of the discovery of Brazil

(A)Pedro Alvarez Cabral


(B)Barthalomio Diaz


(C)Christopher Columbus


(D)John Cabot


93. Who wrote 'The last temptation of Christ'

(A)Vergil


(B)Nikos Kazantzaks


(C)Ovid


(D)Giovanavi Boccaccio


94. Which is a Scandinavian country?


(A)Finland


(B)Greece


(C)Ecuador


(D)Medagaskar


95. Which district is the largest producer of Tobacco in Kerala?

(A)Idukki


(B)Warangal


(C)Kasargod


(D)Palakkad


96. Nobel prize of literature of 1913 given:


(A)Tolstoy


(B)J.K.Rowling


(C)Oscar wilde


(D)Ravindranath Tagore


97. Playing time of National Anthem:

seconds


seconds


seconds


seconds


98. Worlds largest delta:

(A)Sunderbands


(B)Rann of Kutch


(C)Obeestuary


(D)Dead sea


99. Author of 'Freedom at MidNight'

(A)Chethan Bhagath


(B)Larrycolins and Doming Lapiere


(C)Neeraj. C. Choudari


(D)Mulana Abdul Kalam Azed


100. Who directed The Film 'Schindlers


(A)Francis Cappola


(B)Jeen Luke Godard


(C)Steven SpielBierg


(D)George Eastman