Placement Papers: Atlas Copco 2004 May 21 Chennai

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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 Carburetor (ans)
  • Fuel pump
  • Which of the following is not present in a SI engine 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 provision for flow of liquid with regulation
  • If a block of ice floating in a tub of water and gets melted then what will be the level of water?
  • 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
  • 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 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 WH 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? 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 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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