107 + Interview Questions in Fuel Technologies in Applied Chemistry Page 1 InterviewSolution

1.	The pressure applied in vapour phase cracking is __________(a) 10-20kg/cm^2(b) 100kg/cm^2(c) 50kg/cm^2(d) 80kg/cm^2This question was addressed to me in an interview for internship.Question is taken from Cracking and Knocking of Petroleum topic in section Fuel Technologies of Applied Chemistry
Answer» Correct option is (a) 10-20kg/cm^2 The BEST EXPLANATION: The pressure applied in the VAPOUR PHASE cracking is very small about 10-20kg/cm^2.The oils will be very easily vaporized.

Discussion

2.	Knocking is also called as __________(a) cracking(b) pinging(c) doping(d) crushingI got this question in a job interview.The question is from Cracking and Knocking of Petroleum topic in section Fuel Technologies of Applied Chemistry
Answer» The correct option is (b) pinging The explanation: Pinging is the other NAME of knocking. CRACKING means the process of BREAKING the higher hydrocarbons into SIMPLE atoms. Doping means adding impurity to a pure metal to improve its conductivity. Crushing means divided into small pieces.

Discussion

3.	What is the catalyst used in catalytic polymerization?(a) Phosphoric acid(b) Al2O3(c) Al2(siO3)3(d) Zirconium oxideThe question was posed to me in an interview.My question comes from Mining of Petroleum in division Fuel Technologies of Applied Chemistry
Answer» The CORRECT ANSWER is (a) Phosphoric ACID Explanation: Phosphoric acid is used as catalyst in catalytic polymerization and Al2O3 , Al2(SIO3)3 are used as catalysts in catalytic thermal cracking.

Discussion

4.	Naphthenes having more than 20 C-atoms are called as ________(a) cyclo alkenes(b) cyclo alkanes(c) cyclo paraffins(d) cyclo alkynesThe question was posed to me in an international level competition.Question is taken from Classification of Crude Oil based on their Composition topic in portion Fuel Technologies of Applied Chemistry
Answer» RIGHT choice is (C) cyclo PARAFFINS Explanation: Cyclo paraffins are the Naphthenes having more than 20 C-atoms. The other cyclo compounds may have more than 20 CARBON atoms but they are not Naphthenes.

Discussion

5.	The flame colour of the aromatic compounds is ________(a) yellow(b) orange(c) green(d) pinkThe question was posed to me during an online exam.I need to ask this question from Classification of Crude Oil based on their Composition topic in division Fuel Technologies of Applied Chemistry
Answer» The correct answer is (a) yellow Explanation: The FLAME COLOR of the AROMATIC compounds is in yellow as a LOT of carbon in the compound CHANGES into carbon black results in yellow flame.

Discussion

6.	The moisture content in the coal can be given by heating the coal for _____ hours.(a) 2(b) 1(c) 4(d) 6I had been asked this question in homework.I'd like to ask this question from Analysis of Coal and Selection in portion Fuel Technologies of Applied Chemistry
Answer» The correct choice is (b) 1 The best EXPLANATION: To determine the moisture content of the coal, the coal is HEATED at the temperature 105-110^0C in a SILICA crucible for 1 hour later it is dried, COOLED and WEIGHED.

Discussion

7.	The moisture content of the good fuel must be _________(a) 50%(b) High in amount(c) Low in amount(d) 70%I got this question in an internship interview.My query is from Characteristics of Good Fuel and its Advantages topic in division Fuel Technologies of Applied Chemistry
Answer» The correct option is (c) Low in amount To explain: We cannot SAY exact moisture content of a good fuel but it must be low in amount because the fuel with HIGH moisture content will not burn PROPERLY and results in less heat and less CALORIFIC value. For a good fuel calorific value is more.

Discussion

8.	Which of the following is not the constitute of CNG?(a) Ethane(b) Propane(c) Isobutane(d) COI have been asked this question in my homework.My doubt stems from Fuel Technologies Problems topic in portion Fuel Technologies of Applied Chemistry
Answer» Right option is (C) Isobutane For explanation: Isobutane is also called as LPG is not the constitute of the CNG. ETHANE, propane and other gases LIKE nitrogen, CO are the constituents of the CNG.

Discussion

9.	Power alcohols contains ________(a) 50-60% of petrol(b) 70-80% of petrol(c) 50-60% of ethanol(d) 70-80% of ethanolI had been asked this question at a job interview.Query is from Power alcohols as Fuels topic in section Fuel Technologies of Applied Chemistry
Answer» CORRECT ANSWER is (b) 70-80% of petrol Explanation: When ethyl alcohol is used in INTERNAL combustion ENGINES then it is called as POWER. So, it contains 70-80% of petrol and 20-25% of ethanol.

Discussion

10.	The gasoline vapours are purified by __________(a) thermal cracking(b) catalytic cracking(c) stabilization(d) knockingThe question was posed to me in exam.My question is taken from Cracking and Knocking of Petroleum topic in division Fuel Technologies of Applied Chemistry
Answer» Correct answer is (c) stabilization For EXPLANATION I would say: The stabilization is the process in which the GASOLINE vapours are purified. Thermal cracking and catalytic cracking are the processes to purify the PETROL.

Discussion

11.	In the catalytic cracking, what Is the catalyst used?(a) Nacl(b) Kcl(c) ZnSO4(d) Al2O3I had been asked this question during an interview.My question comes from Cracking and Knocking of Petroleum topic in section Fuel Technologies of Applied Chemistry
Answer» Right ANSWER is (d) AL2O3 To EXPLAIN I would say: Al2O3 and also Al2(SiO3)3 acts as catalysts in catalytic cracking. USAGE of these catalysts, the quality of petrol is high without any HEATING.

Discussion

12.	Heavy oil on refractionation produces _________(a) Asphalt(b) diesel oil(c) grease(d) kerosene oilThe question was posed to me in an online interview.Query is from Mining of Petroleum topic in division Fuel Technologies of Applied Chemistry
Answer» Right option is (c) GREASE Explanation: Heavy oil on refractionation produces grease. It also produces LUBRICATING oil, PETROLEUM JELLY, paraffin wax.

Discussion

13.	Lignite is also called as __________(a) black coal(b) brown coal(c) char coal(d) crude oilI have been asked this question in a job interview.I would like to ask this question from Solid Fuels topic in section Fuel Technologies of Applied Chemistry
Answer» CORRECT option is (B) brown coal Best explanation: Lignite is ALSO called as brown coal. Char coal is USED for domestic purposes and it is DIFFERENT from lignite.

Discussion

14.	What is the catalyst used in Bergius process?(a) nickel oleate(b) phosphoric acid(c) zirconium oxide(d) aluminum oxideI got this question during an online exam.I'd like to ask this question from Mining of Petroleum in division Fuel Technologies of Applied Chemistry
Answer» Right choice is (a) nickel oleate For explanation I WOULD say: In Bergius process the CATALYST used is Nickel oleate. In this process the low ash coal is FINELY POWDERED and turned into a paste using heavy oil and the catalyst is taken into temperature.

Discussion

15.	Ethyl alcohol reduces the _________(a) oxygen emissions(b) efficiency(c) polluting emissions(d) nitrogen emissionsThis question was posed to me in an interview for internship.Query is from Power alcohols as Fuels topic in division Fuel Technologies of Applied Chemistry
Answer» Right choice is (c) polluting emissions The best I can explain: Ethyl ALCOHOL CONTAINS nascent oxygen atoms that reduce the pollutants like CO and other HYDRO carbons.

Discussion

16.	To improve anti knock of diesel ___________ are added.(a) TEL(b) Pre-ignition dopes(c) Di ethyl telluride(d) N-hexa decaneThis question was posed to me by my school principal while I was bunking the class.I want to ask this question from Cracking and Knocking of Petroleum in division Fuel Technologies of Applied Chemistry
Answer» The CORRECT option is (B) Pre-ignition DOPES The best explanation: To improve the anti-knock of diesel the pre-ignition dopes are added. Generally ETHYL NITRATE, isoamyl nitrate and acetane peroxide are added as pre-ignition dopes.

Discussion

17.	Removal of water is done by ___________(a) Orsteds process(b) Kjeldahl’s process(c) Filtration(d) Cottrells processI had been asked this question in a job interview.The doubt is from Mining of Petroleum topic in section Fuel Technologies of Applied Chemistry
Answer» RIGHT option is (d) Cottrells process For explanation I would SAY: Cottrells process is used to remove the WATER from the PETROLEUM. kjeldahl’s process is used to know the percentage of nitrogen in the coal sample.

Discussion

18.	To calculate the % of ash content the dry coal is heated in ____________(a) blast furnace(b) muffle furnace(c) reverberatory furnace(d) electric furnaceThe question was posed to me at a job interview.I need to ask this question from Analysis of Coal and Selection topic in chapter Fuel Technologies of Applied Chemistry
Answer» The CORRECT answer is (b) muffle furnace Best explanation: The ASH content is FOUND by heating the moisture less coal in muffle furnace. REVERBERATORY furnace is a metallurgical or process furnace.

Discussion

19.	Which of the following process is correct in the process of conversion of wood into coal?(a) wood → peat → lignite → bituminous coal(b) peat → wood → lignite → bituminous coal(c) lignite → peat → wood → bituminous coal(d) wood → lignite → peat → bituminous coalThis question was addressed to me by my college director while I was bunking the class.The doubt is from Solid Fuels topic in division Fuel Technologies of Applied Chemistry
Answer» The correct ANSWER is (a) wood → peat → lignite → bituminous coal To explain: The wood is CONVERTED into coal steps wise. It is in the order of wood →peat →lignite →bituminous coal. The bituminous coal is later converted into anthracite or GRAPHITE.

Discussion

20.	One of the advantages of solid fuel is _________(a) low calorific value(b) requirement of excess air(c) ash formation(d) ease of transportThis question was posed to me by my school teacher while I was bunking the class.My doubt is from Solid Fuels in section Fuel Technologies of Applied Chemistry
Answer» The CORRECT option is (d) ease of transport The best explanation: SOLID FUELS can be transported very easily when COMPARED to liquids and gaseous. Gaseous fuels are very difficult to carry as they escape easily and highly inflammable.

Discussion

21.	The dulong’s formula is not applicable for __________(a) solid fuel(b) gaseous fuel(c) liquid fuel(d) any fuelThis question was posed to me during an interview.I'm obligated to ask this question of Dullong’s Formula in division Fuel Technologies of Applied Chemistry
Answer» The correct option is (B) gaseous fuel For explanation: For calculating the components of COAL and the PETROLEUM the DULONG’s formula is APPLIED. So, the dulong’s formula is applied for both solids and liquids and not for gaseous.

Discussion

22.	A fuel is a combustible substance containing ______ as major constitute.(a) nitrogen(b) oxygen(c) carbon(d) hydrogenI had been asked this question in exam.This interesting question is from Characteristics of Good Fuel and its Advantages in division Fuel Technologies of Applied Chemistry
Answer» Correct option is (c) CARBON Explanation: In every fuel the major CONSTITUTE is carbon. The other components like OXYGEN, NITROGEN, hydrogen and sulphur are also present but in very small amounts when compared to carbon.

Discussion

23.	On combusting a solid fuel, the final product obtained in high amount is ________(a) oxygen(b) nitrogen(c) ash(d) ozoneThe question was posed to me in an interview for internship.This key question is from Characteristics of Good Fuel and its Advantages topic in division Fuel Technologies of Applied Chemistry
Answer» The correct choice is (c) ASH The best explanation: After combusting a fuel the product left in more amount is ash. The oxygen and OZONE cannot be produced in most of the CASES. NITROGEN MAY be produced but in small amount than that of ash.

Discussion

24.	The natural gas along with the petroleum is called __________(a) water gas(b) oil gas(c) wet gas(d) heavy oilThe question was asked in semester exam.Asked question is from Power alcohols as Fuels in section Fuel Technologies of Applied Chemistry
Answer» Correct choice is (c) wet gas To ELABORATE: The NATURAL gas along with the petroleum is called as wet gas and WATER gas is the MIXTURE of the CO and water.

Discussion

25.	Power alcohol is _______ than petrol.(a) bad product(b) less efficient(c) costlier(d) cheaperThe question was posed to me in an interview for job.The origin of the question is Power alcohols as Fuels topic in portion Fuel Technologies of Applied Chemistry
Answer» Right option is (d) cheaper The best explanation: Power ALCOHOL is cheaper than PETROL. It is the main ADVANTAGE of the power alcohols MADE them to be FUELS.

Discussion

26.	Crude oil is in the form of ____________(a) emulsion of oil and brine(b) emulsion of oil and impurities(c) emulsion of brine and impurities(d) emulsion of impurities and moistureI got this question in unit test.Query is from Mining of Petroleum topic in section Fuel Technologies of Applied Chemistry
Answer» Correct choice is (a) emulsion of oil and brine The BEST I can explain: The crude oil is obtained from the EARTH’s crust which will be in the form of emulsion of oil and brine. It is very STABLE. When this emulsion is CHARGED then water GETS separated from the oil.

Discussion

27.	Aromatic compounds are _____ with water.(a) dissolves(b) immiscible(c) forms lump(d) easily dissolvesThe question was posed to me during an interview.This intriguing question originated from Classification of Crude Oil based on their Composition topic in division Fuel Technologies of Applied Chemistry
Answer» RIGHT ANSWER is (b) immiscible For explanation: Aromatic compounds do not DISSOLVE in WATER. They do not form lumps with water but OLEFINS will dissolve in water slightly.

Discussion

28.	An increase in 1% of percentage of oxygen decreases the calorific value by ________(a) 1.7%(b) 2.7%(c) 3.7%(d) 4.7%I had been asked this question by my school teacher while I was bunking the class.My question comes from Analysis of Coal and Selection in division Fuel Technologies of Applied Chemistry
Answer» CORRECT answer is (a) 1.7% Easy EXPLANATION: The increase in 1% of oxygen RESULTS in a decrease of 1.7% of calorific value. So, always good fuel must CONTAIN LESS amount of oxygen.

Discussion

29.	Which of the following fuel gas will have the highest calorific value?(a) Water gas(b) Bio gas(c) Producer gas(d) Natural gasThe question was posed to me in a national level competition.Question is from Calorific Value topic in portion Fuel Technologies of Applied Chemistry
Answer» CORRECT answer is (d) NATURAL gas To explain I would say: Natural gas produces a HIGH amount of heat when compared to the other THREE gases. Water gas and producer gas are synthetic FUELS and natural gas natural fuel.

Discussion

30.	CNG is stored at a pressure of ___________(a) 281-621kg/cm^2(b) 482-591kg/cm^2(c) 200-248kg/cm^2(d) 800-828kg/cm^2I have been asked this question in an online interview.This intriguing question originated from Power alcohols as Fuels topic in section Fuel Technologies of Applied Chemistry
Answer» Right option is (c) 200-248kg/cm^2 For explanation: CNG is very light WEIGHT gas. So, the STORAGE of the gas is LITTLE difficult. So, it is stored at a PRESSURE of 200-248kg/cm^2.

Discussion

31.	In fixed bed catalytic cracking, the catalyst is reactivated after every __________(a) 8-10hrs(b) 20-24hrs(c) 5-7hrs(d) 12-15hrsI have been asked this question during an interview.Question is from Cracking and Knocking of Petroleum in division Fuel Technologies of Applied Chemistry
Answer» Right CHOICE is (a) 8-10hrs For explanation: In fixed-bed catalytic cracking, the CATALYST is REACTIVATED after EVERY 8-10hrs and continuous by burning the deposited CARBON.

Discussion

32.	What is the calorific value of an ideal fuel?(a) 30.8k.cal(b) High(c) 20.2k.cal(d) LowI got this question during an internship interview.This interesting question is from Characteristics of Good Fuel and its Advantages topic in portion Fuel Technologies of Applied Chemistry
Answer» Right answer is (c) 20.2k.cal The BEST explanation: An IDEAL fuel must contain high calorific value. A calorific value is the AMOUNT of heat produced by complete COMBUSTION of a good fuel. So, more the fuel which produces more heat on complete burning will be the ideal one.

Discussion

33.	Weight of the coal is 2g and after heating the coal sample, the weight of the coal is 1.82g. What is the % of the moisture in coal?(a) 20%(b) 9%(c) 10%(d) 30%I had been asked this question by my college professor while I was bunking the class.I'm obligated to ask this question of Analysis of Coal and Selection topic in chapter Fuel Technologies of Applied Chemistry
Answer» Correct answer is (b) 9% To elaborate: We know that % of MOISTURE=[(w1-w2)/weight of coal]100, where w1=weight of the coal sample, w2=weight of the coal after HEATING. After substituting the given VALUES in the formula, you’ll get 9% as an answer. Here’s the CALCULATION step-by-step: ((2 – 1.82) / 2) 100 ==> (0.18/2) * 100 ==> 0.09 * 100 ==> 9%

Discussion

34.	The % of the fixed carbon can be given by _________(a) %C=[loss in weight due to removal of C/weight of coal sample]100(b) %C=[weight of coal/12100](c) %C=100-(% of ash)(d) %C=100-(% of moisture+% of volatile matter+% of ash)The question was posed to me in final exam.Enquiry is from Analysis of Coal and Selection topic in portion Fuel Technologies of Applied Chemistry
Answer» Correct OPTION is (d) %C=100-(% of moisture+% of VOLATILE matter+% of ash) EASY explanation: The % of carbon can be determined easily because the coal will have the highest AMOUNT of carbon CONTENT. So, from 100 we have to subtract the other contents % to get % of carbon.

Discussion

35.	From the raw piece, coal is manufactured by ________(a) under crushing(b) over crushing(c) perfectly crushed(d) powderedI had been asked this question at a job interview.I'd like to ask this question from Analysis of Coal and Selection in division Fuel Technologies of Applied Chemistry
Answer» Right choice is (C) perfectly crushed The BEST explanation: The coal is manufactured by perfectly crushing the raw PIECE because if the raw material is under crushed and over crushed then the chemical content varies and cannot be GOOD for combustion.

Discussion

36.	CNG has high auto-ignition temperature of _______(a) 813k(b) 993k(c) 1163k(d) 1273kThe question was posed to me by my college professor while I was bunking the class.I'd like to ask this question from Power alcohols as Fuels in portion Fuel Technologies of Applied Chemistry
Answer» Right option is (a) 813k To EXPLAIN I would say: CNG also have high auto IGNITION energy and has a CALORIFIC value of 900 kJ/mole. Its auto ignition temperature is about 813k.

Discussion

37.	Boiling point of LPG is ___________(a) 546k(b) 373k(c) above room temperature(d) below room temperatureThe question was posed to me in final exam.This key question is from Power alcohols as Fuels topic in section Fuel Technologies of Applied Chemistry
Answer» Correct ANSWER is (d) below room temperature Easiest explanation: LPG has the PROPERTY of fast ignition and it NEEDS very less amount of energy to BURN that is the heat supplied is very low about the temperature less than that if room temperature.

Discussion

38.	Natural gas contains ___________(a) methane=70-90%(b) benzene=40-30%(c) hydrogen=50%(d) methane=80-40%This question was addressed to me in exam.I want to ask this question from Power alcohols as Fuels topic in section Fuel Technologies of Applied Chemistry
Answer» Right option is (a) methane=70-90% EASIEST EXPLANATION: The COMPOSITION of NATURAL gas is: methane=70-90%; benzene=5-10%; CO+Carbon dioxide=remainder.

Discussion

39.	In vapour phase thermal cracking, the temperature achieved is ___________(a) 200-400^oC(b) 600-650^oC(c) 500-820^oC(d) 700-800^oCI got this question in my homework.My question is taken from Cracking and Knocking of Petroleum in section Fuel Technologies of Applied Chemistry
Answer» The CORRECT option is (b) 600-650^oC The explanation is: In VAPOUR PHASE thermal cracking, the temperature achieved is 600-650^oC and in fixed-bed CATALYTIC cracking, the temperature is about 425-250^oC.

Discussion

40.	Naphthenes are also called as _______(a) cyclo alkanes(b) aromatics(c) cyclo alkenes(d) cyclo alkynesThis question was addressed to me in an international level competition.I'd like to ask this question from Classification of Crude Oil based on their Composition topic in division Fuel Technologies of Applied Chemistry
Answer» RIGHT answer is (a) CYCLO alkanes The best explanation: Naphthenes can also be called as cyclo alkanes. Aromatics are MOSTLY benzene RINGS.

Discussion

41.	Aromatic compounds are produced from ________(a) natural gas(b) coal tar(c) oil gas(d) heavy gasThis question was addressed to me in exam.My question comes from Classification of Crude Oil based on their Composition topic in division Fuel Technologies of Applied Chemistry
Answer» Right answer is (b) COAL tar To EXPLAIN: AROMATIC compounds are produced from coal tar. They are of fruity ODOR that means they will have some sweet smell.

Discussion

42.	In determination of % of C and H, the coal is burnt in the stream of _______(a) pure sulphur(b) pure nitrogen(c) pure alcohol(d) pure oxygenThis question was addressed to me in an interview for internship.The above asked question is from Analysis of Coal and Selection in chapter Fuel Technologies of Applied Chemistry
Answer» Right choice is (d) pure oxygen To EXPLAIN I WOULD SAY: The carbon and hydrogen are BURNT in the stream of pure oxygen so that they get converted into CO2 and H2O which are passed through Cacl2 and KOH bulbs.

Discussion

43.	Which of the following fuels has the highest calorific value?(a) lignite(b) wood(c) bituminous(d) anthraciteThis question was addressed to me during an online exam.My question is taken from Solid Fuels topic in division Fuel Technologies of Applied Chemistry
Answer» Right OPTION is (d) ANTHRACITE Easy explanation: Anthracite has the CALORIFIC value 8650-8700k.cal/kg as the highest one. The calorific VALUES of the OTHERS are as follows: Wood-4000-4500k.cal/kg Bituminous-8000-8500k.cal/kg Lignite-6500-7100k.cal/kg.

Discussion

44.	_______ are used as rocket propellants in olden days.(a) solid fuels(b) liquid fuels(c) petroleum(d) gaseous fuelsThe question was asked in an international level competition.My question comes from Solid Fuels topic in chapter Fuel Technologies of Applied Chemistry
Answer» Correct CHOICE is (a) solid fuels For EXPLANATION I would say: Solid fuels are used in rocket fuels. Gun powder is the MAIN solid fuels that is mostly used in the ROCKETS in the EARLY stages but now we are using mostly liquid fuels as they have more efficiency than solid fuels.

Discussion

45.	The pressure applied in fixed-bed catalytic cracking is __________(a) 10kg/cm^2(b) 50kg/cm^2(c) 100kg/cm^2(d) 1.5kg/cm^2I have been asked this question in exam.I would like to ask this question from Cracking and Knocking of Petroleum in section Fuel Technologies of Applied Chemistry
Answer» The correct choice is (d) 1.5kg/cm^2 Easy EXPLANATION: The pressure of 1.5kg/cm^2 applied in the FIXED bed catalytic cracking and during this process 40% of charge is CONVERTED into gasoline.

Discussion

46.	In moving bed catalytic cracking, the catalyst is in the form of ____________(a) fine powder(b) pallets(c) liquid form(d) gaseous formThe question was posed to me in class test.My doubt is from Cracking and Knocking of Petroleum in chapter Fuel Technologies of Applied Chemistry
Answer» Right CHOICE is (a) fine POWDER To ELABORATE: In moving bed catalytic cracking, the catalyst is made into a fine powder and CHARGED into the catalyst chamber. So, they move freely like fluids.

Discussion

47.	What are the best anti knocking reagents of petrol?(a) straight chain alkanes(b) straight chain alkenes(c) alkynes(d) aromaticsThis question was posed to me in an interview for job.This is a very interesting question from Cracking and Knocking of Petroleum topic in chapter Fuel Technologies of Applied Chemistry
Answer» The CORRECT answer is (d) aromatics To ELABORATE: The straight CHAIN COMPOUNDS cause maximum petrol knock and aromatics are called the best anti knock agents of petrol.

Discussion

48.	What is the pressure applied during hydrogenation of coal?(a) 200-280atm(b) 200-250atm(c) 300-380atm(d) 300-350atmThis question was posed to me in an interview.Question is from Mining of Petroleum topic in division Fuel Technologies of Applied Chemistry
Answer» The CORRECT option is (B) 200-250atm Explanation: A pressure of 200-250atm is applied in Bergius PROCESS for one HOUR 30 minutes.In polymerization the pressure of 70-350kg/cm^2 is applied.

Discussion

49.	A formula giving the gross heating value of coal in terms of the weight fractions of carbon, hydrogen, oxygen and sulphur from the _________(a) ultimate analysis(b) proximate analysis(c) distillation(d) filtrationI had been asked this question during a job interview.I need to ask this question from Dullong’s Formula topic in section Fuel Technologies of Applied Chemistry
Answer» CORRECT answer is (a) ULTIMATE analysis To explain I would say: The percentages of the COAL components are given by ultimate analysis and the proximate analysis is used to know the percentages of VOLATILE matter, moisture, etc.

Discussion

50.	The Bomb calorimeter is used to determine the calorific value of _________(a) solids and liquid fuels(b) solid and gaseous fuels(c) liquid fuels that can be easily vaporized(d) solid fuels onlyI got this question by my college professor while I was bunking the class.This interesting question is from Calorific Value in chapter Fuel Technologies of Applied Chemistry
Answer» The correct choice is (a) solids and liquid fuels For EXPLANATION I would say: In Bomb calorimeter, we can find the calorific value of both solid and GAS fuels. InBoy’s calorimeter we can FIN calorific value for gaseous and easily VAPORIZED liquid fuels.

Discussion

Explore topic-wise InterviewSolutions in .

The pressure applied in vapour phase cracking is __________(a) 10-20kg/cm^2(b) 100kg/cm^2(c) 50kg/cm^2(d) 80kg/cm^2This question was addressed to me in an interview for internship.Question is taken from Cracking and Knocking of Petroleum topic in section Fuel Technologies of Applied Chemistry

Knocking is also called as __________(a) cracking(b) pinging(c) doping(d) crushingI got this question in a job interview.The question is from Cracking and Knocking of Petroleum topic in section Fuel Technologies of Applied Chemistry

What is the catalyst used in catalytic polymerization?(a) Phosphoric acid(b) Al2O3(c) Al2(siO3)3(d) Zirconium oxideThe question was posed to me in an interview.My question comes from Mining of Petroleum in division Fuel Technologies of Applied Chemistry

The flame colour of the aromatic compounds is ________(a) yellow(b) orange(c) green(d) pinkThe question was posed to me during an online exam.I need to ask this question from Classification of Crude Oil based on their Composition topic in division Fuel Technologies of Applied Chemistry

The moisture content in the coal can be given by heating the coal for _____ hours.(a) 2(b) 1(c) 4(d) 6I had been asked this question in homework.I'd like to ask this question from Analysis of Coal and Selection in portion Fuel Technologies of Applied Chemistry

The moisture content of the good fuel must be _________(a) 50%(b) High in amount(c) Low in amount(d) 70%I got this question in an internship interview.My query is from Characteristics of Good Fuel and its Advantages topic in division Fuel Technologies of Applied Chemistry

Which of the following is not the constitute of CNG?(a) Ethane(b) Propane(c) Isobutane(d) COI have been asked this question in my homework.My doubt stems from Fuel Technologies Problems topic in portion Fuel Technologies of Applied Chemistry

Power alcohols contains ________(a) 50-60% of petrol(b) 70-80% of petrol(c) 50-60% of ethanol(d) 70-80% of ethanolI had been asked this question at a job interview.Query is from Power alcohols as Fuels topic in section Fuel Technologies of Applied Chemistry

The gasoline vapours are purified by __________(a) thermal cracking(b) catalytic cracking(c) stabilization(d) knockingThe question was posed to me in exam.My question is taken from Cracking and Knocking of Petroleum topic in division Fuel Technologies of Applied Chemistry

In the catalytic cracking, what Is the catalyst used?(a) Nacl(b) Kcl(c) ZnSO4(d) Al2O3I had been asked this question during an interview.My question comes from Cracking and Knocking of Petroleum topic in section Fuel Technologies of Applied Chemistry

Heavy oil on refractionation produces _________(a) Asphalt(b) diesel oil(c) grease(d) kerosene oilThe question was posed to me in an online interview.Query is from Mining of Petroleum topic in division Fuel Technologies of Applied Chemistry

Lignite is also called as __________(a) black coal(b) brown coal(c) char coal(d) crude oilI have been asked this question in a job interview.I would like to ask this question from Solid Fuels topic in section Fuel Technologies of Applied Chemistry

What is the catalyst used in Bergius process?(a) nickel oleate(b) phosphoric acid(c) zirconium oxide(d) aluminum oxideI got this question during an online exam.I'd like to ask this question from Mining of Petroleum in division Fuel Technologies of Applied Chemistry

Ethyl alcohol reduces the _________(a) oxygen emissions(b) efficiency(c) polluting emissions(d) nitrogen emissionsThis question was posed to me in an interview for internship.Query is from Power alcohols as Fuels topic in division Fuel Technologies of Applied Chemistry

Removal of water is done by ___________(a) Orsteds process(b) Kjeldahl’s process(c) Filtration(d) Cottrells processI had been asked this question in a job interview.The doubt is from Mining of Petroleum topic in section Fuel Technologies of Applied Chemistry

One of the advantages of solid fuel is _________(a) low calorific value(b) requirement of excess air(c) ash formation(d) ease of transportThis question was posed to me by my school teacher while I was bunking the class.My doubt is from Solid Fuels in section Fuel Technologies of Applied Chemistry

The dulong’s formula is not applicable for __________(a) solid fuel(b) gaseous fuel(c) liquid fuel(d) any fuelThis question was posed to me during an interview.I'm obligated to ask this question of Dullong’s Formula in division Fuel Technologies of Applied Chemistry

A fuel is a combustible substance containing ______ as major constitute.(a) nitrogen(b) oxygen(c) carbon(d) hydrogenI had been asked this question in exam.This interesting question is from Characteristics of Good Fuel and its Advantages in division Fuel Technologies of Applied Chemistry

The natural gas along with the petroleum is called __________(a) water gas(b) oil gas(c) wet gas(d) heavy oilThe question was asked in semester exam.Asked question is from Power alcohols as Fuels in section Fuel Technologies of Applied Chemistry

Power alcohol is _______ than petrol.(a) bad product(b) less efficient(c) costlier(d) cheaperThe question was posed to me in an interview for job.The origin of the question is Power alcohols as Fuels topic in portion Fuel Technologies of Applied Chemistry

Which of the following fuel gas will have the highest calorific value?(a) Water gas(b) Bio gas(c) Producer gas(d) Natural gasThe question was posed to me in a national level competition.Question is from Calorific Value topic in portion Fuel Technologies of Applied Chemistry

CNG is stored at a pressure of ___________(a) 281-621kg/cm^2(b) 482-591kg/cm^2(c) 200-248kg/cm^2(d) 800-828kg/cm^2I have been asked this question in an online interview.This intriguing question originated from Power alcohols as Fuels topic in section Fuel Technologies of Applied Chemistry

In fixed bed catalytic cracking, the catalyst is reactivated after every __________(a) 8-10hrs(b) 20-24hrs(c) 5-7hrs(d) 12-15hrsI have been asked this question during an interview.Question is from Cracking and Knocking of Petroleum in division Fuel Technologies of Applied Chemistry

What is the calorific value of an ideal fuel?(a) 30.8k.cal(b) High(c) 20.2k.cal(d) LowI got this question during an internship interview.This interesting question is from Characteristics of Good Fuel and its Advantages topic in portion Fuel Technologies of Applied Chemistry

From the raw piece, coal is manufactured by ________(a) under crushing(b) over crushing(c) perfectly crushed(d) powderedI had been asked this question at a job interview.I'd like to ask this question from Analysis of Coal and Selection in division Fuel Technologies of Applied Chemistry

CNG has high auto-ignition temperature of _______(a) 813k(b) 993k(c) 1163k(d) 1273kThe question was posed to me by my college professor while I was bunking the class.I'd like to ask this question from Power alcohols as Fuels in portion Fuel Technologies of Applied Chemistry

Boiling point of LPG is ___________(a) 546k(b) 373k(c) above room temperature(d) below room temperatureThe question was posed to me in final exam.This key question is from Power alcohols as Fuels topic in section Fuel Technologies of Applied Chemistry

Natural gas contains ___________(a) methane=70-90%(b) benzene=40-30%(c) hydrogen=50%(d) methane=80-40%This question was addressed to me in exam.I want to ask this question from Power alcohols as Fuels topic in section Fuel Technologies of Applied Chemistry

In vapour phase thermal cracking, the temperature achieved is ___________(a) 200-400^oC(b) 600-650^oC(c) 500-820^oC(d) 700-800^oCI got this question in my homework.My question is taken from Cracking and Knocking of Petroleum in section Fuel Technologies of Applied Chemistry

Aromatic compounds are produced from ________(a) natural gas(b) coal tar(c) oil gas(d) heavy gasThis question was addressed to me in exam.My question comes from Classification of Crude Oil based on their Composition topic in division Fuel Technologies of Applied Chemistry

Which of the following fuels has the highest calorific value?(a) lignite(b) wood(c) bituminous(d) anthraciteThis question was addressed to me during an online exam.My question is taken from Solid Fuels topic in division Fuel Technologies of Applied Chemistry

_______ are used as rocket propellants in olden days.(a) solid fuels(b) liquid fuels(c) petroleum(d) gaseous fuelsThe question was asked in an international level competition.My question comes from Solid Fuels topic in chapter Fuel Technologies of Applied Chemistry

The pressure applied in fixed-bed catalytic cracking is __________(a) 10kg/cm^2(b) 50kg/cm^2(c) 100kg/cm^2(d) 1.5kg/cm^2I have been asked this question in exam.I would like to ask this question from Cracking and Knocking of Petroleum in section Fuel Technologies of Applied Chemistry

In moving bed catalytic cracking, the catalyst is in the form of ____________(a) fine powder(b) pallets(c) liquid form(d) gaseous formThe question was posed to me in class test.My doubt is from Cracking and Knocking of Petroleum in chapter Fuel Technologies of Applied Chemistry

What is the pressure applied during hydrogenation of coal?(a) 200-280atm(b) 200-250atm(c) 300-380atm(d) 300-350atmThis question was posed to me in an interview.Question is from Mining of Petroleum topic in division Fuel Technologies of Applied Chemistry