Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm. (A) 3-5 (B) 25-30 (C) 60-65 (D) 95-100

Initial pressure of oxygen introduced into the 'bomb' of the bomb
calorimeter for determination of calorific value of coal/fuel oil may be
around __________ atm.
(A) 3-5
(B) 25-30
(C) 60-65
(D) 95-100
by

1 Answer

Answer :

(B) 25-30
by

Related questions

During its calorific value determination by bomb calorimeter, coal is combusted by (A) Air (B) Oxygen (C) Oxygen enriched air (D) None of these

Description : During its calorific value determination by bomb calorimeter, coal is combusted by (A) Air (B) Oxygen (C) Oxygen enriched air (D) None of these

Last Answer : (C) Oxygen enriched air

Bomb calorimeter is used for the determination of calorific value of the __________ fuels. (A) Gaseous (B) Solid(C) Liquid(D) Both (B) and (C)

Description : Bomb calorimeter is used for the determination of calorific value of the __________ fuels. (A) Gaseous (B) Solid (C) Liquid (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Bomb calorimeter can be used to determine the __________ of the coal. (A) Sulphur content (B) Calorific value (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Bomb calorimeter can be used to determine the __________ of the coal. (A) Sulphur content (B) Calorific value (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Junker's calorimeter is used to determine the calorific value of (A) Pulverised coal (B) Gaseous fuels (C) Fuel oil (D) None of these

Description : Junker's calorimeter is used to determine the calorific value of (A) Pulverised coal (B) Gaseous fuels (C) Fuel oil (D) None of these

Last Answer : (B) Gaseous fuels

Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter. (A) Junker's (B) Bomb (C) Boy's (D) None of these

Description : Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter. (A) Junker's (B) Bomb (C) Boy's (D) None of these

Last Answer : (B) Bomb

Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.) (A) GCV at constant pressure (B) GCV at constant volume (C) NCV at constant pressure (D) NCV at constant volume

Description : Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.) (A) GCV at constant pressure (B) GCV at constant volume (C) NCV at constant pressure (D) NCV at constant volume

Last Answer : (C) NCV at constant pressure

Calorific value as determined by bomb calorimeter is the (A) Higher calorific value at constant volume(B) Gross calorific value at constant pressure(C) Lower calorific value at constant pressure(D) Net calorific value at constant volume

Description : Calorific value as determined by bomb calorimeter is the (A) Higher calorific value at constant volume (B) Gross calorific value at constant pressure (C) Lower calorific value at constant pressure (D) Net calorific value at constant volume

Last Answer : (A) Higher calorific value at constant volume

Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter. (A) Bomb (B) Boy's (C) Junkers (D) None of these

Description : Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter. (A) Bomb (B) Boy's (C) Junkers (D) None of these

Last Answer : (A) Bomb

Calorific value of proteins as determined in a bomb calorimeter is (A) 4 kcal/gm (B) 4.8 kcal/gm (C) 5.4 kcal/gm (D) 5.8 kcal/gm

Description : Calorific value of proteins as determined in a bomb calorimeter is (A) 4 kcal/gm (B) 4.8 kcal/gm (C) 5.4 kcal/gm (D) 5.8 kcal/gm

Last Answer : Answer : C

Calorific value of proteins in a living person is less than that in a bomb calorimeter because (A) Digestion and absorption of proteins is less than 100% (B) Respiratory quotient of proteins is less than 1 (C) Specific dynamic action of proteins is high (D) Proteins are not completely oxidized in living persons

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Last Answer : Answer : D

A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having (A) Higher methane content and thus higher calorific value (B) Higher carbon monoxide content(C) Lower carbon dioxide content(D) None of these

Description : A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having (A) Higher ... calorific value (B) Higher carbon monoxide content (C) Lower carbon dioxide content (D) None of these

Last Answer : (A) Higher methane content and thus higher calorific value

The best method of determining sulphur in crude oil is by the __________ method. (A) Kjeldahl (B) Dumas (C) Bomb calorimeter (D) Junkers calorimeter

Description : The best method of determining sulphur in crude oil is by the __________ method. (A) Kjeldahl (B) Dumas (C) Bomb calorimeter (D) Junkers calorimeter

Last Answer : (C) Bomb calorimeter

Quantity of coke produced from metallurgical coal may be around __________ percent. (A) 30 (B) 50 (C) 75 (D) 95

Description : Quantity of coke produced from metallurgical coal may be around __________ percent. (A) 30 (B) 50 (C) 75 (D) 95

Last Answer : (C) 75

Pick out the wrong statement. (A) High concentration of oxygen in flue gas means high stack loss (B) Gaseous fuels require the least % excess air for complete combustion (C) The ratio of fixed carbon to volatile matter percentage in coal is called its 'fuel ratio' (D) Calorific value of natural gas is more than that of LPG

Description : Pick out the wrong statement. (A) High concentration of oxygen in flue gas means high stack loss (B) Gaseous fuels require the least % excess air for complete combustion (C) The ratio of fixed carbon to ... coal is called its 'fuel ratio' (D) Calorific value of natural gas is more than that of LPG

Last Answer : (D) Calorific value of natural gas is more than that of LPG

Calorific value of bituminous coal may be around __________ Kcal/kg. (A) 500 (B) 1500 (C) 6500 (D) 20000

Description : Calorific value of bituminous coal may be around __________ Kcal/kg. (A) 500 (B) 1500 (C) 6500 (D) 20000

Last Answer : (C) 6500

Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg. (A) 1000 (B) 4000 (C) 8000 (D) 15000

Description : Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg. (A) 1000 (B) 4000 (C) 8000 (D) 15000

Last Answer : (C) 8000

Out of the following fuels, the difference between the net and gross calorific value is maximum in case of (A) Pitch (B) Fuel oil (C) Blast furnace gas (D) Bituminous coal

Description : Out of the following fuels, the difference between the net and gross calorific value is maximum in case of (A) Pitch (B) Fuel oil (C) Blast furnace gas (D) Bituminous coal

Last Answer : (B) Fuel oil

Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent. (A) 10-15 (B) 25-30 (C) 45-50 (D) 65-70

Description : Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent. (A) 10-15 (B) 25-30 (C) 45-50 (D) 65-70

Last Answer : (B) 25-30

Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg. (A) 1000 (B) 4000 (C) 6000 (D) 8000

Description : Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg. (A) 1000 (B) 4000 (C) 6000 (D) 8000

Last Answer : (B) 4000

Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C. (A) 400-500 (B) 900-1000 (C) 1400-1500 (D) 1700-1800

Description : Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are ... __________ °C. (A) 400-500 (B) 900-1000 (C) 1400-1500 (D) 1700-1800

Last Answer : (B) 900-1000

Most chemical plants use an initial working capital amounting to 10- 20% of the total capital investment. But this percentage may increase to __________ percent in case of seasonal products manufacturing plant. (A) 30 (B) 50 (C) 75 (D) 95

Description : Most chemical plants use an initial working capital amounting to 10- 20% of the total capital investment. But this percentage may increase to __________ percent in case of seasonal products manufacturing plant. (A) 30 (B) 50 (C) 75 (D) 95

Last Answer : (B) 50

With increase in the oxygen content of the coal, its __________ decreases. (A) Calorific value (B) Caking power (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : With increase in the oxygen content of the coal, its __________ decreases. (A) Calorific value (B) Caking power (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam. (A) Bomb (B) Separating (C) Bucket (D) Throttling

Description : Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam. (A) Bomb (B) Separating (C) Bucket (D) Throttling

Last Answer : A) Bomb

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter. (A) Bomb (B) Throttling (C) Junker's (D) Boy's

Description : Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter. (A) Bomb (B) Throttling (C) Junker's (D) Boy's

Last Answer : Option B

Presence of __________ in a dry gaseous fuel does not contribute to its calorific value. (A) Sulphur (B) Oxygen (C) Hydrogen (D) Carbon

Description : Presence of __________ in a dry gaseous fuel does not contribute to its calorific value. (A) Sulphur (B) Oxygen (C) Hydrogen (D) Carbon

Last Answer : (B) Oxygen

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because (A) Its calorific value is very less (B) Tar neutralises the residual acids present in pitch (C) It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop (D) All (A), (B) and (C)

Description : Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because (A) Its calorific value is very less (B) Tar neutralises the residual acids ... for its transportation through pipelines at economic pressure drop (D) All (A), (B) and (C)

Last Answer : (C) It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop

A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be (A) More (B) Less (C) Same (D) Data insufficient; can't be predicted

Description : A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be (A) More (B) Less (C) Same (D) Data insufficient; can't be predicted

Last Answer : (C) Same

The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent. (A) 60 (B) 30 (C) 95 (D) 100

Description : The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent. (A) 60 (B) 30 (C) 95 (D) 100

Last Answer : (A) 60

Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent. (A) 80 and 97 (B) 95 and 100 (C) 40 and 70 (D) 25 and 97

Description : Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent. (A) 80 and 97 (B) 95 and 100 (C) 40 and 70 (D) 25 and 97

Last Answer : (A) 80 and 97

A steam calorimeter receives steam from a pipe at 0.1 MPa and 20°SH. For a pipe steam pressure of 2 MPa, what is the quality of the steam?  a) 95.56%  b) 70.10%  c) 95.20%  d) 85.10% Formula: h1 = hf1 + x1hfg1

Description : A steam calorimeter receives steam from a pipe at 0.1 MPa and 20°SH. For a pipe steam pressure of 2 MPa, what is the quality of the steam?  a) 95.56%  b) 70.10%  c) 95.20%  d) 85.10% Formula: h1 = hf1 + x1hfg1

Last Answer : 265.4°C, 430.7kJ/kg, 71.4kJ/kg, 1.0327kJ/(kg)(K),502.1 kJ/kg

Which of the following fuel gases has the highest calorific value? (A) Natural gas (B) Coal bed methane (CBM) (C) Liquefied petroleum gas (LPG) (D) Sewage gas

Description : Which of the following fuel gases has the highest calorific value? (A) Natural gas (B) Coal bed methane (CBM) (C) Liquefied petroleum gas (LPG) (D) Sewage gas

Last Answer : (C) Liquefied petroleum gas (LPG)

Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher (A) Calorific value (B) Higher C/H ratio (C) Sulphur content (D) Difference in gross & net calorific value

Description : Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher (A) Calorific value (B) Higher C/H ratio (C) Sulphur content (D) Difference in gross & net calorific value

Last Answer : (B) Higher C/H ratio

Smoke point of a good burning kerosene may be around __________ mm. (A) 0-5 (B) 20-25 (C) 60-75 (D) 100-120

Description : Smoke point of a good burning kerosene may be around __________ mm. (A) 0-5 (B) 20-25 (C) 60-75 (D) 100-120

Last Answer : (B) 20-25

Ratio of primary air to secondary air increases with increase in the rank of coal, because the (A) High rank coals have higher amount of volatile matter (B) Ratio of fixed carbon to volatile matter increases (C) Oxygen content progressively decreases (D) Calorific value of the coal increases

Description : Ratio of primary air to secondary air increases with increase in the rank of coal, because the (A) High rank coals have higher amount of volatile matter (B) Ratio of fixed carbon to volatile matter increases (C) Oxygen content progressively decreases (D) Calorific value of the coal increases

Last Answer : (B) Ratio of fixed carbon to volatile matter increases

Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its (A) Caking index (B) Yield of carbonised products (C) Friability & oxygen content (D) Calorific value

Description : Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its (A) Caking index (B) Yield of carbonised products (C) Friability & oxygen content (D) Calorific value

Last Answer : (C) Friability & oxygen content

Low temperature oxidation of coal during storage does not decrease its (A) Oxygen content (B) Caking power (C) Calorific value (D) None of these

Description : Low temperature oxidation of coal during storage does not decrease its (A) Oxygen content (B) Caking power (C) Calorific value (D) None of these

Last Answer : (D) None of these

Low temperature oxidation of coal resulting from bad storage conditions does not decrease its (A) Caking power (B) Calorific value (C) Hydrogen content (D) Oxygen content

Description : Low temperature oxidation of coal resulting from bad storage conditions does not decrease its (A) Caking power (B) Calorific value (C) Hydrogen content (D) Oxygen content

Last Answer : (D) Oxygen content

Low temperature oxidation of stored coal results in the (A) Decrease in its caking power & calorific value (B) Decrease in its carbon & hydrogen content (C) Increase in its oxygen content (D) All (A), (B) and (A)

Description : Low temperature oxidation of stored coal results in the (A) Decrease in its caking power & calorific value (B) Decrease in its carbon & hydrogen content (C) Increase in its oxygen content (D) All (A), (B) and (A)

Last Answer : (D) All (A), (B) and (A)

Pick out the correct statement. (A) Oxygen content decreases from lignite to bituminous coal as the coalification increases (B) The less the oxygen content, better is the coal, as it reduces the calorific value (C) With increase in oxygen content, moisture holding capacity of coal increases and the caking power decreases (D) All (A), (B) and (C)

Description : Pick out the correct statement. (A) Oxygen content decreases from lignite to bituminous coal as the coalification increases (B) The less the oxygen content, better is the coal, as it reduces the calorific value (C ... capacity of coal increases and the caking power decreases (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

The 'bomb' in the bomb calorimeter is made of (A) Molybdenum stainless steel(B) Mild steel(C) High silicon iron (14% Si)(D) Copper

Description : The 'bomb' in the bomb calorimeter is made of (A) Molybdenum stainless steel (B) Mild steel (C) High silicon iron (14% Si) (D) Copper

Last Answer : (A) Molybdenum stainless steel

The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to (A) Minimise its corrosion (B) Avoid radiation heat loss (C) Make it look attractive (D) None of these

Description : The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to (A) Minimise its corrosion (B) Avoid radiation heat loss (C) Make it look attractive (D) None of these

Last Answer : (B) Avoid radiation heat loss

Calorific value of dry wood may be around __________ Kcal/kg. (A) 5 (B) 50 (C) 500 (D) 5000

Description : Calorific value of dry wood may be around __________ Kcal/kg. (A) 5 (B) 50 (C) 500 (D) 5000

Last Answer : (A) 5

Tray spacing in a distillation column of dia 10-12 ft. used in petroleum refinery may be around __________ inches. (A) 5 (B) 30 (C) 60 (D) 100

Description : Tray spacing in a distillation column of dia 10-12 ft. used in petroleum refinery may be around __________ inches. (A) 5 (B) 30 (C) 60 (D) 100

Last Answer : (B) 30

Which of the following fuels has the highest calorific value per unit mass (kcal/kg)? (A) Coal (B) Kerosene (C) Natural gas (D) Furnace oil

Description : Which of the following fuels has the highest calorific value per unit mass (kcal/kg)? (A) Coal (B) Kerosene (C) Natural gas (D) Furnace oil

Last Answer : (D) Furnace oil

Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by (A) Preheating the combustion air (B) Oxygen enrichment of combustion air (C) Preheating the fuel gas (D) All (A), (B) & (C)

Description : Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by (A) Preheating the combustion air (B) Oxygen enrichment of combustion air (C) Preheating the fuel gas (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Tar is a better fuel than furnace oil, because of its (A) Higher calorific value (B) Lower sulphur content (C) Higher emissivity (0.8-0.9) resulting in higher radiation heat transfer rate (D) Both (A) and (B)

Description : Tar is a better fuel than furnace oil, because of its (A) Higher calorific value (B) Lower sulphur content (C) Higher emissivity (0.8-0.9) resulting in higher radiation heat transfer rate (D) Both (A) and (B)

Last Answer : (D) Both (A) and (B)

Explain higher and lower calorific value of a coal having following composition by mass Carbon 81%,Hydrogen 7%, Oxygen 8%,Nitrogen 2.5%, sulphur 1.5% and remaining is ash

Description : Explain higher and lower calorific value of a coal having following composition by mass Carbon 81%,Hydrogen 7%, Oxygen 8%,Nitrogen 2.5%, sulphur 1.5% and remaining is ash

Last Answer : Carbon C = 81% = 0.81 Hydrogen = H2 = 7% = 0.07 Oxygen = O2 = 8% = 0.08 Nitrogen = N = 2.5% = 0.025 Sulphur = S =1.5% = 0.015 Ash = 2.5% = 0.025 Dulong's formula: H.C.V. of coal = 33800 C + 144500 ... = H.C.V.- 9H2 x 2442 KJ / Kg = 36187.5- 9 x 0.07 x 2442 L.C.V. of coal = 34649.04 KJ / Kg 

The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be (A) y (B) 0.95 y (C) 1.05 y (D) 1.8 y

Description : The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be (A) y (B) 0.95 y (C) 1.05 y (D) 1.8 y

Last Answer : (A) y

Describe with neat sketch of working of bomb calorimeter

Description : Describe with neat sketch of working of bomb calorimeter

Last Answer : working of bomb calorimeter:   The calorimeter is made of austenitic steel which provides considerable resistant to corrosion and enables it to withstand high pressure. In the calorimeter use of a strong ... the calorimeter. From the above data the calorific value of the fuel can be found.  

(i) Draw the neat sketch of bomb calorimeter. (ii) Write any three sources of air leakage in steam condenser.

Description : (i) Draw the neat sketch of bomb calorimeter. (ii) Write any three sources of air leakage in steam condenser.

Last Answer : (i)   (ii) Sources of air leakage in condenser: i) Air leak through joints and packing. ii) Air also comes in condenser with the steam. iii) In jet condensers dissolved air in the cooling water enters the condenser.