Description : Among the fuels given below, the one with highest calorific value is (1) Coke (2) Coal (3) Wood (4) Natural gas
Last Answer : Natural gas
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
Description : Out of the following fuels, the difference between gross and net calorific value will be minimum in case of (A) Coke oven gas (B) Water gas (C) Natural gas (D) Blast furnace gas
Last Answer : (D) Blast furnace gas
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
Description : Which of the following gaseous fuels is likely to have the highest gross calorific value? (A) Sewage gas (B) LPG (C) Producer gas (D) Natural gas
Last Answer : (B) LPG
Description : Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3 )? (A) Producer gas (B) Carburetted water gas (C) Natural gas (D) Liquefied petroleum gas
Last Answer : (D) Liquefied petroleum gas
Description : Which one of the following gases has the highest calorific value? (1) Natural gas (2) Water gas (3) Coal gas (4) Indane gas
Last Answer : (4) Indane gas Explanation: The basic calorific value for solid and liquid fuels is the gross calorific value at constant volume and for gaseous fuels it is the gross calorific value at constant pressure. The ... Water gas: 4600-4800; and LPG (liquefied petroleum gas such as Indane): 11,900 Kcal/Kg.
Description : Which one of the following gases has the highest calorific value? (1) Natural gas (2)Water gas (3) Coal gas (4)Indane gas
Last Answer : Indane gas
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
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)
Description : In high temperature carbonisation (as compared to low temperature carbonisation) of coal (A) Coke oven gas yield is more (B) Tar yield is less but free carbon in tar is more (C) Calorific value of coke oven gas is less (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has (A) Higher calorific value (B) Lower hydrogen content (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (D) Neither (A) nor (B)
Description : Low temperature carbonisation of coal produces (A) Metallurgical coke (B) Soft coke (C) Very low calorific value coke oven gas (D) No by-products
Last Answer : (B) Soft coke
Description : Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm3 . (A) 4000 (B) 2500 (C) 6500 (D) 10000
Last Answer : (C) 6500
Description : Pick out the wrong statement. (A) Percentage of ash in coke produced from medium coking coal is more than that in coal (B) The calorific value (kcal/Nm3 ) of coke oven gas reduces on ... plants in India at Talcher (Orissa) and Ramagundam (A.P) employ Kopper-Totzek process of coal gasification
Last Answer : (C) Ash is normally removed as 'fly-ash' in Kopper-Totzek process of coal gasification
Description : With increase in the temperature of carbonisation of coal (A) Hydrogen content of coke oven gas increases due to cracking ofhydrocarbons (B) Methane content in the coke oven gas decreases and carbon monoxide content increases ( ... compensated by increase in CO & H2 content (D) All (A), (B) and (C)
Description : In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. (A) Difference in gross & net calorific value of the coke oven gas (B) Free carbon content in tar (C) Yield percentage of coke (D) Yield of ammonia present in coke oven gas
Last Answer : (A) Difference in gross & net calorific value of the coke oven gas
Description : In high temperature carbonisation of coal compared to low temperature carbonisation (A) Yield of ammonia is less (B) Aromatic content of tar is low (C) H2 content in the coke oven gas is more (D) Calorific value of the coke oven gas is lower
Last Answer : (C) H2 content in the coke oven gas is more
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
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
Description : Which of the following has the highest gross calorific value? (A) Blast furnace gas (B) Coke oven gas (C) Carburetted water gas (D) Oil refinery gas
Last Answer : (D) Oil refinery gas
Description : The calorific value is the highest out of the following for (A) Producer gas (B) Water gas (C) Coke oven gas (D) Blast furnace gas
Last Answer : (C) Coke oven gas
Description : Which of the following has the least calorific value (kcal/Nm3 )? (A) Blast furnace gas (B) Coke oven gas (C) Sewage gas (D) Natural gas
Last Answer : (A) Blast furnace gas
Description : Which of the following fuels is generally not used in thermal power plant boiler firing? (A) Furnace oil, light diesel oil and tar/PCM (B) Pulverised coking coal (C) Coal middling from washeries (D) B.F. gas, coke oven gas and L.D. converter gas
Last Answer : (B) Pulverised coking coal
Description : Find out the ‗odd‘ among the following choices for fuel substitution for industrial sector of India. a) LDO with LSHS b) Coal with rice husk c) Natural gas for fertilizer plant d) LPG for soft coke
Last Answer : LPG for soft coke
Description : Which of the following gaseous fuels has the lowest calorific value? (A) Gobar gas (B) Refinery gas (C) Converter gas (D) Blast furnace gas
Description : Which of the following has the highest calorific value (kcal/Nm3 )? (A) Carburetted water gas (B) Gobar gas (C) Natural gas (D) LPG
Last Answer : (D) LPG
Description : Gross & net calorific value is the same for (A) Blast furnace gas (B) Coke oven gas (C) L.D. converter gas (D) None of these
Last Answer : (C) L.D. converter gas
Description : Removal of hydrogen from coke oven gas (A) Increases its calorific value (B) Decreases its calorific value (C) Does not alter its calorific value (D) Is not possible on commercial scale
Last Answer : (A) Increases its calorific value
Description : Coke oven gas is a better fuel than blast furnace gas, because of its higher (A) Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity) (B) Adiabatic flame temperature ... release rate (thus requiring smaller combustion chamber) (D) All (A), (B) and (C)
Description : For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3 ), while the C.V. is same on weight basis (i.e., kcal/kg)? (A) Propane and acetylene (B) Propane and LPG (C) Sewage gas and gobar gas (D) B.F. gas and coke oven gas
Last Answer : (A) Propane and acetylene
Description : Blast furnace gas compared to coke oven gas has (A) Lower ignition temperature (B) Narrower limit of inflammability (C) Higher calorific value (D) Lower theoretical flame temperature
Last Answer : (D) Lower theoretical flame temperature
Description : Pick out the wrong statement: (A) Carburetted water gas is also called blue gas (B) Coals are divided in four species according to their carbon content in Seylor's classification (C) Carbonisation time ... and net calorific value of a fuel is the same, if it does not contain hydrogen or hydrocarbons
Last Answer : (A) Carburetted water gas is also called blue gas
Description : Calorific value of coke oven gas is around __________ Kcal/Nm3 . (A) 900 (B) 4200 (C) 7500 (D) 2000
Last Answer : (B) 4200
Description : For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg)? (A ... and acetylene (B) Propane and LPG (C) Sewage gas and gobar gas (D) B.F gas and coke oven gas
Last Answer : D) B.F gas and coke oven gas
Description : Which is the highest grade of coal whose surface is shining and has the highest calorific value? -Do You Know?
Last Answer : answer:
Description : Which is the highest grade of coal whose surface is shining and has the highest calorific value?
Last Answer : Anthracite
Description : Which of the following has the highest calorific value? (A) Lignite (B) Sub-bituminous coal (C) Anthracite (D) Peat
Last Answer : (C) Anthracite
Description : If ……. has a future, then ultra-super critical boiler will be the key. a) Coal b) Fossil fuels c) Natural gas d) Oil
Last Answer : a) Coal
Description : Fossil fuels mean (A) Solid fuels (B) Liquid fuels (C) Those fuels which are found in the crust of earth (D) Premature fuels with low calorific value
Last Answer : (C) Those fuels which are found in the crust of earth
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)
Description : With increase in calorific value of fuels, their adiabatic flame temperatures (A) Increase (B) Decrease (C) Remain unchanged (D) May increase or decrease; depends on the quantity of products of combustion
Last Answer : (D) May increase or decrease; depends on the quantity of products of combustion
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
Description : Liquid fuels have higher calorific value than solid fuels. A. Yes B. No
Last Answer : Answer: A
Description : Which of the following statement is incorrect? A. The liquid fuels consist of hydrocarbons. B. The liquid fuels have higher calorific value than solid fuels. C. The solid fuels have higher calorific value than liquid fuels. D. A good fuel should have low ignition point.
Last Answer : Answer: C
Description : Compare the following fuels on the basis of calorific value and knocking. LPG, CNG and bio-diesel
Last Answer : Parameter LPG CNG Bio-diesel Calorific value 46.4MJ/Kg LPG has consistent & higher calorific value. 52.34 MJ/Kg Which is higher than LPG. 37.27 MJ/Kg this ... 65 which is higher than petro-diesel. So intensity of knocking is less in biodiesel compared to petro diesel.