Atlas Copco  Placement Paper   Technical - Other   CHENNAI-21 May 2004

Atlas Copco  Placement Paper   Technical - Other   CHENNAI-21 May 2004


  • Posted by  FreshersWorld 
    7 Jan, 2012

    ATLAS COPCO - 2004 MAY 21 CHENNAI


    STEP I : WRITTEN TEST : 60 QUESTIONS 1 HOUR ELIMINATION ROUND

    Hygrometry deals with (ans. moisture content in air)
    1 kg-m =9.81 J
    Relation between gauge, abs atm pressures
    Work-study deals with
    Time study deals with
    Expand MIS-Management Information System
    CPM and PERT deals with (ans. Determining the status of the project)
    To avoid cavitation in a centrifugal pump
    Inlet pressure should be high(ans)
    Discharge pressure should be high
    Expand NTP-(Normal temperature and press)
    Dalton?s law of pressure
    (Total pressure equals sum of partial pressures)

    As per Avogadro?s hypothesis
    (Molecular wt of all gases occupy the same volume under same conditions of temp and pressure)

    Use of intercooler-(to reduce work input)
    Use of after cooler-(to reduce volume of receiver)
    water hammer occurs (due to sudden obstruction in flow)
    ABC analysis deals with
    Main objective behind plant layout is
    to avoid back tracking
    To minimize the space occupied
    Efficiency of diesel engine as compared to petrol engine under same rated load (high)
    Which of the following is not present in a CI engine
    Fuel injector
    Carburetor (ans)
    Fuel pump
    Which of the following is not present in a SI engine
    Spark plug
    Carburetor
    Fuel injector(ans)
    pour point is ( min temp at which a liquid flows at set condition)
    Zeroth law of thermodynamics
    In value engg ?value? means----------
    second law of thermodynamics deals with (ans: entropy)
    Mach no deals with------
    Output=9kW, Input=30kW, Efficiency=? (Ans: 30%)
    Overall hear transfer co-eff. Present in
    Conduction
    Convection
    Conduction and convection
    All modes of heat transfer.
    Orifice Definition
    a. provision for flow of liquid with regulation

    Break even point.(ans:no profit and no loss)
    If a block of ice floating in a tub of water and gets melted then what will be the level of water a. falls down b.rises ,c. remains the same
    Compressed air coming out of a punctured football
    Remains at the same temperature
    Becomes hotter
    Becomes cooler
    Heat transfer takes place as per
    Second law
    First law
    Zeroth law
    Choking in compressor means
    a. fixed mass flow rate independent of the pressure ratio (ans)

    Formation of frost in refrigerator
    Can be prevented if design is proper
    Heat transfer becomes more?
    Heat loss
    Immaterial (ans)
    Supercharging is the process of (increasing the density of the inlet charge)
    How will you find the unburnt mixture in exhaust gas
    Analyzing CO
    Analyzing Oxygen
    Compression ratio is the ratio of
    Delivery pr.to inlet pr.
    Inlet pr to delivery pr.
    Stroke volume to clearance volume
    To reduce moisture troubles the compressor main should be
    Vertical
    Horizontal
    Slanting
    Critical activity is
    Zero float
    High float
    Low float
    Cash discounts is based on
    Sold on credit
    Bargaining capacity of the seller
    Payment of instant cash
    1 kW-hr=3600 kJ.
    which process is more effective for compression
    isothermal(ans)
    adiabatic
    polytrophic
    What did W.H. Taylor do?
    An adiabatic compression is one in which (no heat enters or leaves the system)
    What happens if the refrigerator doors are kept open?
    a. The room will be warmed up gradually (ans)

    In which device, the temp of the refrigerant is the lowest
    Compressor
    Condenser
    Expansion valve
    Evaporator
    In break even analysis ,profit occurs when (sales revenue >total cost)
    A material piece weighs 2.5 kg in air and 3 kg, when immersed in water, then sp.gr is
    A body of sp.gr 7 is immersed in mercury of sp.gr 13.6. What percent of the body will be immersed in water? (ans. 0.515)
    1 tone of refrigeration is
    a. The cooling effect produced when melting one tone of ice

    Unit of power( Watt)
    What is the use of the reverse flow of air in compressor
    Cleaning the dust particles settled
    Velocity of the air flow increases
    pressure increases
    Rota meter ?Flow measurement
    If we use petrol in diesel engine (lot of fuel will remain unburnt)
    The intake of air in an air compressor can be had from
    An area nearby coal yard
    An area nearby a cooling tower
    A room in which conditioned air is maintained at 20C
    Atm air maintained at 1 C

    STEP II : INTERVIEW - ELIMINATION ROUND

    STEP III : GROUP DISCUSSION ? ELIMINATION ROUND

    STEP IV : INTERVIEW WITH COMPANY CHIEF AT PUNE

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