Engg Chemistry Unit-4 Fuels And Combustion MCQ's

Updated on 2019/03/21 10:07

Q.1    Bituminous coal burns with ....    
    a)    Long smoky flame    
    b)    Smoky yellow flame    
    c)    Short non- smoky blue    
    d)    None of the above

Q. 2    Anthracite has %C of _________.    
    a)    55-65%    
    b)    60-75%    
    c)    78-90%    
    d)    92-96%

Q. 3    Proximate analysis involves  _________.    

    a)    % Ash+%VM+% moisture+%FC of coal    
    b)    %C+ %H+% O of coal    
    c)    %C of coal    
    d)    VM+% moisture+%FC of coal    

 

Q. 4    A good fuel is _________.    
    a)    Moderate ignition temperature    
    b)    Cheap and readily available    
    c)    High calorific value    
    d)    All of the above    

Q. 5    Unit of Calorific value of a solid fuel in MKS system is _________.    
    a)    Cal/g    
    b)    Kcal/Kg    
    c)    J/Kg    
    d)    Cal/lit    

Q. 6    Calorific value of a good fuel is _________.    

    a)    High    
    b)    low    
    c)    Mild    
    d)    None of the above

Q. 7    Full form of GCV is _________.    

    a)    Gross Calorific value    
    b)    Grace calorific value    
    c)    Ground calorific value    
    d)    Gram calorific Value

Q. 8    Relation between GCV & NCV is ________    

    a)    GCV+NCV=Latent heat of water vapour    
    b)    GCV= NCV + Latent heat of water vapour    
    c)    Latent heat of water vapour=NCV-GCV    
    d)    None of the above    

Q. 9    Calorific value of solid fuel is measured in ________.    

    a)    J/Kg    
    b)    Kg    
    c)    J/m3    
    d)    Cal/g    

Q. 10    Moisture, ash content, volatile matter and fixed carbon are measured for coal  as a part of ___.    

    a)    Proximate analysis    
    b)    Proximate analysis & Ultimate Analysis    
    c)    Ultimate Analysis    
    d)    None of the above    

 

Q. 11    What is the percentage of oxygen by volume in the atmosphere?    
    a)    14    
    b)    23    
    c)    20.9    
    d)    79    

Q. 12    LPG is predominantly _______.    

    a)    Methane    
    b)    Hydrogen    
    c)    A mixture of butane + propane    
    d)    Ethane    

Q. 13    Biogas is produced by anaerobic fermentation of biological materials. The main constituent of biogas is _______.
    a)    Methane    
    b)    Ethane    
    c)    Butane    
    d)    Propane    

Q. 14    Which of the following is a non renewable energy resource?    

    a)    Solar energy    
    b)    Wind energy    
    c)    hydroelectric    
    d)    Coal    

Q. 15    Bomb calorimeter is used for finding calorific value of ________ Fuels.    

    a)    Nonvolatile liquid fuel    
    b)    Gas fuel    
    c)    Solid fuel    
    d)    Both a and c above    

 

Q. 16    Boyís calorimeter gives the calorific value of  ________.    

    a)    Volatile liquid Fuel    
    b)    Gaseous fuel    
    c)    Both a and b    
    d)    None of the above    

Q. 17    Wood when converted into coal has ... Calorific value    

    a)    high    
    b)    low    
    c)    medium    
    d)    none of the above

Q. 18    The texture of anthracite coal is _________.    

    a)    Brown fibrous    
    b)    Lustrous black    
    c)    Lustrous green    
    d)    Dull grey    

 

Q. 19    Which type of coal contains C= 92 % ?    

    a)    Peat    
    b)    Lignite    
    c)    Bituminous    
    d)    Anthracite    

Q. 20    For determination of % VM coal sample is kept in muffle furnace for ________.    

    a)    500∞ C 5 min    
    b)    725 ∞C5 min    
    c)    800 ∞C 8 min    
    d)    925∞ C 7 min

Q. 21    Ignition temperature decreases progressively from anthracite to lignite, because    

    a)    volatile matter content increases    
    b)    carbon content decreases    
    c)    moisture content decreases    
    d)    ash content decreases    

Q. 22    Which of the following constituents of a fuel does not contribute to its calorific value on    
    combustion?
    a)    Hydrogen    
    b)    Sulphur    
    c)    Carbon    
    d)    Nitrogen

Q. 23    Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.    

    a)    1000    
    b)    4000    
    c)    8000    
    d)    15000    

Q. 24    Principle of Bomb calorimeter is _________.    

    a)  Total heat liberated by complete combustion of known amount of fuel is absorbed by    
        known mass of water in calorimeter    
    b)  Total heat liberated by complete combustion of known amount of fuel is eliminated by    
        known mass of water in calorimeter    
    c)  Total heat liberated by complete combustion of known amount of fuel is absorbed by    
        known mass of kerosene in calorimeter    
    d)  None of the above    

Q. 25    In Boyís gas calorimeter burner is surrounded by chimney called as _______    

    a)    Combustion chamber    
    b)    Upper chamber    
    c)    Burnibng chamber    
    d)    None of the above    

Q. 26    High temperature carbonization takes place.    

    a)    In the presence of air    
    b)    In absence of air    
    c)    Presence of catalyst    
    d)    None of the above

Q. 27    Low temperature carbonization takes place at...

    a)    300- 400 ∞C    
    b)    500-700 ∞ C    
    c)    900-1000∞ C    
    d)    Above1500 ∞C    

Q. 28    Which of the following is a true statement?    

    a)    Higher is the volatile matter higher is ignition temperature    
    b)    Higher is the volatile matter lower is ignition temperature    
    c)    Lower is the volatile matter higher is ignition temperature    
    d)    Lower is the volatile matter lower is ignition temperature

Q. 29    Which of the following gas has highest calorific value?    
    a)    Sulphur    
    b)    Nitrogen    
    c)    oxygen    
    d)    Hydrogen

Q. 30    What is knocking?    

    a)    Wear and tear of machine    
    b)    Sharp metallic rattling noise    
    c)    Warming up of machine    
    d)    Increase in working temperature    

Q. 31    Octane no. of petrol is percentage of ________.    

    a)    Pentane and isopentane    
    b)    Butane and isobutane    
    c)    n heptane and isooctane    
    d)    none of the above

Q. 32    In petrol engine, knocking is due to ________.    

    a)    slow combustion    
    b)    Moderate combustion    
    c)    spontaneous combustion    
    d)    None of the above

Q. 33    2 methylnaphthalene have Cetane no. _______ .    

        a)    0    
    b)    100    
    c)    90    
    d)    28    

Q. 34    Octane no. of iso-octane is _______ .
    a)    20    
    b)    90    
    c)    0    
    d)    100    

Q. 35    _______when mixed with petrol in proper proportion is called as power alcohol.    

    a)    Propanol    
    b)    Butanol    
    c)    Ethanol    
    d)    Iso Propyl alcohol

Q. 36    CNG is _________.    

    a)    Compressed natural gas about 1000 atm.    
    b)    Substitute of gasoline    
    c)    88% CH4 + 10-11 % C2-C4  + CO= 0.5-1%    
    d)    all of the above

Q. 37    Biodiesel is produced via ________.    
    a)    neutralisation process    
    b)    Transesterification process.    
    c)    Etherification Process.    
    d)    None of the above

Q. 38    Composition of LPG is _______.    

    a)    40% butane+60% Propane+ traces of propene and butene.    
    b)    Only methane    
    c)    Only butane    
    d)    All of the above

Q. 39    1.4 of coal sample in Kjeldahlís experiment liberate ammonia absorbed in 50ml 0.1N H2SO4. The resultant solution required 14 ml of 0.1 N NaOH for complete neutralization Blank titration reading in 25ml Find %N in coal _______.    

    a)    0.11    
    b)    0.011    
    c)    1.1        
    d)    1.01        

Q. 40    Theoretical oxygen required for a solid fuel has composition C-86%,H-11.75%,O-2.25 %, is 2.995 kg.Calculate theoretical air supplied per kg of fuel?    

    a)    130.02        
    b)    13.02        
    c)    1.302        
    d)    None of the above

Q. 41    L is latent heat of condensation of water which is given by (in cal/gm)

    a)    578        
    b)    875        
    c)    857        
    d)    587    

Q. 42    % S estimation in a mass of coal is given by ________.    

    a)    %S= 16/233X weight of BaSO4/ weight of coalX100    
    b)    %S= 12/233X weight of BaSO4/ weight of coalX100    
    c)    %S= 32/233X weight of BaSO4/ weight of coalX100    
    d)    None of the above

Q. 43    % O is given by ________        

    a)    % O = 100- (% C +%H+%S+%N+%Ash)    
    b)    % O = 100- (% C +%H)    
    c)    % O = 100- (% C +%S+%N)    
    d)    % O = 100- (%H)    

Q. 44    Calculate % O if % C = 79%,% H = 7%,% S =3.5%,% N= 2.1% and Ash4.4 %?    

    a)    2%        
    b)    3%        
    c)    4%        
    d)    1%

Q.45    Air contains 21% of _______ by volume    

    a)    nitrogen        
    b)    sulphur dioxide        
    c)    hydrogen        
    d)    oxygen        
  

 

Q. 46    Air contains _______% oxygen by mass    
    a)    23        
    b)    21        
    c)    22        
    d)    20        

Q. 47    Combustion of methane is given by the reaction    
    a)    CH4(s)+ 2O2(g)    CO2(g) + 2H20(g) + H    
    b)    CH4(g)+ 2O2(g)    CO2(g) + 2H20(g) + H    
    c)    CH4(g)+ 2O2(g)    CO2(g) + 2H2 (l) + H    
    d)    CH4(g)    CO2(g) + 2H20(g) + H

Q. 48    Higher efficiency in the combustion of solid fuel cannot be achieved by ________.    
    a)    Proper fuel preparation        
    b)    Keeping the flue gas exhaust temperature very high.    
    c)    adopting efficient-fuel firing technique & equipment    
    d)    Supplying correct quantity of combustion air.    

Q. 49    During combustion of gaseous fuels, deficiency of air _______.    
    a)    lengthens the flame        
    b)    Tends to shorten the flame.    
    c)    does not affect the flame length    
    d)    increases the flame temperature    

Q. 50    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.    

Q. 51    Low temperature carbonization is ________ .    

        a)    is mainly for producing the smokeless domestic coke.    
        b)    is meant for the production of 'metallurgical coke'.    
        c)    Produces higher quantity of gas than high temperature carbonization.    
        d)    Produces less quantity of tar than high temperature carbonization.

Q. 52    Presence of __________ in a dry gaseous fuel does contribute to its calorific value.    
        a)    nitrogen    
        b)    hydrogen    
        c)    both a and b    
        d)  none of the above    

Q. 53    Air/gas ratio for complete combustion will be the highest for ________.
        a)    LPG    
        b)    gobar gas    
        c)    hydrogen    
        d)    none of the above    

Q. 54    Bituminous coal is heated in the absence of air at 900-1200 C to get high carbonized coal of    

    a)    Low Aromatic Hydrocarbons    
    b)    High Aromatic Hydrocarbons    
    c)  Both a and b    
    d)  None of the above    

Q. 55    Anthracite coal ________.    

        a)    contains more volatile matter than bituminous coal.    
        b)    ignites more easily than bituminous coal.    
        c)    is essentially a coking coal.    
        d)    burns with short, bluish, yellow-tipped flame producing very little smoke.

Q. 56    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.    

Q. 57    Bituminous coal is heated in the absence of air at 900-1200 ∞C to get    

        a)    Domestic industrial    
        b)    Metallurgical    
        c)    Coke    
        d)    None of the above

Q. 58    Bituminous coal is heated in the absence of air at 500-700∞ C to get    
       
        A)    Domestic industrial    
        B)    Metallurgical    
        C)    Coke    
        D)    None of the above    

Q. 59    Bituminous coal is heated in the absence of air at 500-700 ∞C to get low carbonized coal of    

    A)    Low Aromatic Hydrocarbons    
    B)    High Aromatic Hydrocarbons    
    C)  Both a and b    
    D)  None of the above    

Q. 60    Main constituent of natural gas is.    
        a)    CH4 (up to 90%)    
        b)    C2H6    
        c)    C3H8    
        d)    H2    

Q. 61    The Chemical name of cetane is________
            a)    n hexadecane    
            b)    n heptane    
            c)    Octane    
            d)    Decane    

Q. 62    Addition of Ethyl Alcohol to petrol is    
        a)    Increases the octane no.    
        b)    Decreases the octane no.    
        c)    Makes the combustion fast    
        d)    Knocks badly    

Q. 63    Which of the following has the highest octane no.?    
            a)    Iso-octane    
            b)    Cyclohexane    
            c)    Toulene    
            d)    n- Heptane    

 

Q. 64    Which of the fuels has highest heat of combustion?    
            a)Petrol    
            b)Diesel    
            c)Kerosene    
            d) Hydrogen    

Q. 65    The electrode used in hydrogen oxygen fuel cell is    
            a) Platinum    
            b) Palladium    
            c) Zirconium    
            d) Zinc    

 

Q. 66    The quality of diesel is expressed in terms of    
        a)    Octane-number    
        b)    Cetane number    
        c)    Index number    
        d)    Viscosity    

Q. 67    In order to calculate LCV of a fuel    

        a)    Percentage of hydrogen should be known    
        b)    Moisture content is required    
        c)    High calorific value of fuel is required    
        d)    Amount of Air required for combustion is required.    

Q. 68    Which of them has lowest calorific value    
    a)    Solid Fuel    
    b)    Liquid fuel    
    c)    Gaseous fuel    
    d)    Petroleum    

Q. 69    Which of the following petroleum fractions has lowest boiling point?    
    a)    Diesel    
    b)    Kerosene    
    c)    Petroleum ether    
    d)    Petrol    

Q. 70    The addition of TEL to gasoline    
    a)    Decreases the octane no.    
    b)    Increases the octane no.    
    c)    Makes the combustion fast    
    d)    None of the above

Q. 71    Phosphoric acid fuel cell operates at
    a)    200 ∞C    
    b)    100∞C    
    c)    350∞C    
    d)    175∞C    

Q. 71    Phosphoric acid fuel cell operates at

    a)    200 ∞C    
    b)    100∞C    
    c)    350∞C    
    d)    175∞C    

Q. 73    The fuel used in Phosphoric acid fuel cell (PAFC) is ________

    a)    Methanol    
    b)    Ethanol    
    c)    Propanopl    
    d)    Hexanol    

Q. 74    The fuel cell was first used in ________.    
    a)    Commercial Aircraft    
    b)    Submarine    
    c)    Apollo project    
    d)    Ship    

Q. 75    1 Calorie= ________ Joules    

    a)    4.88    
    b)    4.18    
    c)    4.81    
    d)    4.118    

Q. 76    Beckmannís thermometer is capable of reading temperature up to ________∞C.    

    a)1/100    
    b) 1/10        
    c) 1/1000    
    d) none of the above    
      

 

Q. 77    In Boyís gas Calorimeter spiral tube enclosed in a fully insulated jacket is made up of ________    
    a)    Brass    
    b)    Zn    
    c)    Cu    
    d)    Alloy    

Q. 78    Dry alcohol is ________    
    a)    absolute alcohol    
    b)    100% alcohol    
    c)  50% water + 50% alcohol    
    d)  Both a and b above    

        

Q. 79    Adding ________ to gasoline leads to Lead Pollution.    
        a)    CFC    
        b)    TEL    
        c)    CCl4    
        d)    Tetrahydrofuran    

Q. 80    Analysis of %S in ultimate analysis is also known as
    a) Kjeldahls Method    
    b) Eschka Method    
    c) Dumas Method    
    d) None of the above

References

  • Wikinote Foundation
  • Questions by Prof. Mrs. S. R. Madure, Engineering Science Department,Sinhagarh COE, Pune

 

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Created by Vishal E on 2019/03/21 10:07
    
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