Description : Gross heating value of coal is __________ the net heating value. (A) Higher than (B) Lower than (C) Same as (D) Either (A) or (B); depends on the type of coal
Last Answer : (A) Higher than
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 : Hydrogen content in petroleum products varies from 12 to 15% (by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg. (A) 600-750 (B) 250-350 (C) 1000-1500 (D) 2000-2500
Last Answer : (A) 600-750
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
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 : All heat engines utilize a. lower heating value of oil b. higher heating value of oil c. net calorific value of oil d. calorific value of fuel
Last Answer : ANSWER a. lower heating value of oil
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 : Pick out the wrong statement. (A) Aromatics have higher specific gravity than paraffins (B) Gross calorific value (GCV) of petrofuels is equal to (12400 - 2100 ρ 2 ) where, ρ is the specific gravity ... volume basis (i.e., Kcal/litre) (D) Higher specific gravity of petrofuels means higher C/H ratio
Last Answer : (C) Heavier petrofuels have higher GCV on weight basis (i.e., Kcal/kg) but lower GCV on volume basis (i.e., Kcal/litre)
Description : Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C. (A) Sensible (B) Latent (C) Sensible and latent (D) None of these
Last Answer : (C) Sensible and latent
Description : Gross and net calorific value of a fuel will be the same (A) If its ash content is zero (B) If its carbon content is very low (C) If its hydrogen/hydrogen compound content is zero (D) Under no circumstances
Last Answer : (C) If its hydrogen/hydrogen compound content is zero
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 : 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 : 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
Description : e __________ is the difference in value between a nation's exports and its imports. A)balance of payments B)export/import ratio C)gross domestic product D)net trade value E)balance of trade
Last Answer : A)balance of payments
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 : A coal having higher volatile matter content will necessarily have lower (A) Ash fusion temperature (B) Calorific value (C) Ignition temperature (D) Caking index
Last Answer : (C) Ignition temperature
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
Description : By higher octane number of SI fuel, it is meant that the fuel has (a) Higher heating value (b) Higher flash point (c) Lower volatility (d) Longer ignition delay
Last Answer : Ans : d
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
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
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 : Gross calorific value will be equal to the net calorific value for (A) H2 (B) C2H2 (C) CO (D) C2H6
Last Answer : (C) CO
Description : The accounting report indicates that Alton's sales increased by £2 millions last year. While the Chairman is pleased, the marketing vice president feels that inflation had a great deal to do with this result ... the firm's performance last year. A)net sales B)gross profits C)market share D)cash flow
Last Answer : C)market share
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
Description : A coal having higher volatile matter content, has lower (A) Smoking tendency on burning (B) Coke oven gas yield on carbonisation (C) Chance of catching fire during storage in open space (D) Ignition temperature
Last Answer : (D) Ignition temperature
Description : Combustion of pulverised coal compared to the lumpy coal (A) Provides better control of furnace temperature (B) Facilitates combustion with lower excess air (C) Provides higher thermal efficiency & flame temperature (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should ... to get the same for dry grinding. (A) 1.0 (B) 0.5 (C) 1.34 (D) 4.34
Last Answer : (C) 1.34
Description : Aggregate net value of the output in one year is the - (1) National income at factor cost (2) Gross Domestic Product at market prices (3) Net. National Product at market prices (4) Gross National Product at market prices
Last Answer : (3) Net. National Product at market prices Explanation: Net national product at market price is the market value of the output of final goods and services produced at current price in ... at market price, Net national product at market price=Gross national product at market priceDepreciation.
Description : Which of the following is expected to have the highest value (gm/m2 /yr) in a grassland ecosystem? (a) Secondary production (b) Tertiary production (c) Gross production (GP) (d) Net production (NP
Last Answer : (c) Gross production (GP)
Description : The _____________ is the difference in value between a nation's exports and its imports 1. balance of payments 2. export / import ratio 3. gross domestic product 4. net trade value 5. balance of trade
Last Answer : balance of trade
Description : What is the sum total of gross value added of all the firms in the country added with the net factor income from abroad? a) Gross Domestic Product b) Gross National Product c) Net Domestic Product d) Net National product
Last Answer : b) Gross National Product
Description : What is the sum total of gross value added of all the firms in the country minus the depreciation? a) Gross Domestic Product b) Gross National Product c) Net Domestic Product d) Net National product
Last Answer : c) Net Domestic Product
Description : What is the sum total of gross value added of all the firms in the country? a) Gross Domestic Product b) Gross National Product c) Net Domestic Product d) Net National product
Last Answer : a) Gross Domestic Product
Description : The difference between the Gross value added and Net value added is: a) Investment b) Value added c) Production flow d) Depreciation
Last Answer : d) Depreciation
Description : Gross assets are Rs.1,01,000, fictitious assets Rs.350 are included in the gross assets. External liabilities are Rs.7,500. 6% prefer share capital is Rs.45,000. Equity capital is 4,500 equity shares of Rs.10 each fully ... . The Net Asset Value Per share is A Rs.11 B Rs.10.70 C Rs.15 D Rs.20
Last Answer : Rs.10.70
Description : Explain the following a) Dry Bulb Temperature and Wet bulb Temperature b) Maximum Demand and Power Factor c) Gross Calorific Value & Net Calorific Value d) 5S & Return of Investment (ROI) e) CUSUM
Last Answer : a) Dry Bulb Temperature and Wet bulb Temperature Dry bulb Temperature is an indication of the sensible heat content of air-water vapour mixtures Wet bulb Temperature is a measure of ... of capital cost. This is a broad indicator of the annual return expected from initial capital investment
Description : What is the Gross National Product? a) The total value of Good and services manufactured in the country b) The total value of all the transactions in the country c) Reduction in the total value ... d) The total worth of goods and services generated in the country and net factor income from abroad.
Last Answer : Answer- d
Description : What do you mean by Gross National Product? a) The total value of goods and services produced in the country b) The total value of all transactions in the country c) Depreciation in the total ... d) The total value of goods and services produced in the country and net factor income from abroad
Description : Aggregate net value of the output in one year is the (1) National income at factor cost (2) Gross Domestic Product at market prices (3) Net National Product at market prices (4) Gross National Product at market prices
Last Answer : Net National Product at market prices
Description : Define calorific value. Differentiate between net calorific value and gross calorific value.
Last Answer : Calorific value of fuel The amount of energy produced by the complete combustion of a material or fuel. Measured in units of energy per amount of material, e.g. kJ/kg. Difference between NCV and GCV ... is not an actual heat available for use. It is an actual heat available for use.
Description : 64-132) rank coal (ASTM) means a coal with 64% (A) Fixed carbon and having a heating value around 13, 200 BTU/1b (B) Ash and heating value around 13, 200 BTU/1b (C) Fixed carbon and heating value around 132 BTU/1b (D) None of these
Last Answer : (A) Fixed carbon and having a heating value around 13, 200 BTU/1b
Description : 64-132) rank coal (ASTM) means a coal with 64% (A) Fixed carbon and having a heat value of 13, 200 BTU/1b (B) Ash and a heating value of 13, 200 BTU/1b (C) Fixed carbon and a heating value of 132 BTU/1b (D) None of these
Last Answer : (A) Fixed carbon and having a heat value of 13, 200 BTU/1b
Description : Washing of coal does not reduce its (A) S & P content (B) Heating value (C) Fusion point of ash (D) None of these
Last Answer : (D) None of these
Description : Sulphur in metallurgical coal (A) Contributes to its heating value (B) Affects the quality of steel produced as cracks develop on the surface while rolling the steel (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct? (a) Gross primary productivity is always less than ... same. (d) There is no relationship between Gross primary productivity and Net primary productivity.
Last Answer : (b) Gross primary productivity is always more than Net primary productivity.
Description : When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption. (A) Always lower than (B) Always higher than (C) Same as (D) Dependent on the system; can be either lower or higher than
Last Answer : (A) Always lower than
Description : Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysteresis. In such ... (B) Higher than (C) Same as (D) Either same or higher than
Last Answer : (A) Lower than
Description : The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen. (A) Lower than (B) Higher than (C) Same as (D) Not related to
Description : The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity. (A) 0 (B) 100 (C) 50 (D) None of these
Last Answer : Option B
Description : Which element causes difference in higher and lower heating values of fuel ?
Last Answer : Hydrogen.