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Objective Questions

Latest BPCL Process Technician Exam Question (Objective Questions), MCQ in English

Subjects : Technical Subject (Chemical), General Aptitude

Question Bank BPCL Process Technician Exam - English
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Technical Subject (Chemical)

Question 1Single Answer
The equilibrium constant (K) for a reaction is related to the Gibbs free energy change (ΔG) by:
  1. A
    ΔG = -RT ln(K)
  2. B
    ΔG = RT ln(K)
  3. C
    ΔG = -RT/ln(K)
  4. D
    ΔG = RT/ln(K)
Question 2Single Answer
The first law of thermodynamics states that:
  1. A
    Entropy of an isolated system always increases
  2. B
    Energy can neither be created nor destroyed
  3. C
    Enthalpy remains constant in an adiabatic process
  4. D
    Heat transfer is irreversible
Question 3Single Answer
Which thermodynamic property is a measure of the disorder of a system?
  1. A
    Enthalpy
  2. B
    Gibbs free energy
  3. C
    Entropy
  4. D
    Internal energy
Question 4Single Answer
The Gibbs phase rule is used to determine:
  1. A
    The rate of a chemical reaction
  2. B
    The number of degrees of freedom in a system
  3. C
    The heat transfer coefficient
  4. D
    The mass transfer rate
Question 5Single Answer
What is the term for a system in which there is no transfer of heat with the surroundings?
  1. A
    Isothermal
  2. B
    Isobaric
  3. C
    Adiabatic
  4. D
    Isochoric
Question 6Single Answer
The Clapeyron equation is used to calculate:
  1. A
    Vapor pressure as a function of temperature
  2. B
    Heat capacity
  3. C
    Reaction rate
  4. D
    Mass transfer coefficient
Question 7Single Answer
Fugacity is a measure of:
  1. A
    The ideal gas pressure
  2. B
    The "escaping tendency" of a substance from a phase
  3. C
    The reaction rate
  4. D
    The heat transfer rate
Question 8Single Answer
The rate of a homogeneous reaction is usually expressed as a function of:
  1. A
    Temperature and pressure only
  2. B
    Temperature and concentration
  3. C
    Pressure and flow rate
  4. D
    Flow rate and volume
Question 9Single Answer
A batch reactor is characterized by:
  1. A
    Continuous flow of reactants and products
  2. B
    No flow of reactants or products during the reaction
  3. C
    Constant volume and temperature
  4. D
    Constant pressure and temperature
Question 10Single Answer
A continuous stirred-tank reactor (CSTR) is assumed to be:
  1. A
    Plug flow
  2. B
    Perfectly mixed
  3. C
    Laminar flow
  4. D
    Turbulent flow
Question 11Single Answer
The space time in a plug flow reactor (PFR) is equal to:
  1. A
    The residence time
  2. B
    The reaction rate
  3. C
    The heat transfer rate
  4. D
    The mass transfer rate
Question 12Single Answer
Catalysts increase the rate of a reaction by:
  1. A
    Increasing the temperature
  2. B
    Lowering the activation energy
  3. C
    Increasing the pressure
  4. D
    Changing the equilibrium constant
Question 13Single Answer
What type of reactor is used for heterogeneous catalytic reactions where a solid catalyst is fluidized by the reacting fluid?
  1. A
    Batch reactor
  2. B
    CSTR
  3. C
    Fluidized bed reactor
  4. D
    Packed bed reactor
Question 14Single Answer
The Arrhenius equation describes the temperature dependence of:
  1. A
    Reaction rate constant
  2. B
    Heat transfer coefficient
  3. C
    Mass transfer coefficient
  4. D
    Equilibrium constant
Question 15Single Answer
Distillation is used to separate components based on differences in:
  1. A
    Density
  2. B
    Boiling points
  3. C
    Viscosity
  4. D
    Particle size
Question 16Single Answer
Absorption is a mass transfer operation in which a gas is dissolved in a:
  1. A
    Solid
  2. B
    Liquid
  3. C
    Another gas
  4. D
    Vacuum
Question 17Single Answer
Extraction is a separation process based on differences in:
  1. A
    Solubility
  2. B
    Density
  3. C
    Boiling point
  4. D
    Viscosity
Question 18Single Answer
Drying involves the removal of:
  1. A
    Solutes from a solution
  2. B
    Moisture from a solid
  3. C
    Gases from a mixture
  4. D
    Heat from a system
Question 19Single Answer
Reverse osmosis is an example of a:
  1. A
    Distillation process
  2. B
    Absorption process
  3. C
    Membrane separation process
  4. D
    Drying process
Question 20Single Answer
The Fick's law describes:
  1. A
    Heat conduction
  2. B
    Mass diffusion
  3. C
    Fluid flow
  4. D
    Chemical reaction rates
Question 21Single Answer
Ideal gas law is represented as?
  1. A
    PV = nR
  2. B
    PV = nRT
  3. C
    P/V = nRT
  4. D
    PV = RT/n
Question 22Single Answer
In material balance without chemical reaction, accumulation is?
  1. A
    Zero
  2. B
    Equal to input
  3. C
    Equal to output
  4. D
    None of these
Question 23Single Answer
For a single component system, material balance equation is?
  1. A
    Input – Output = Accumulation
  2. B
    Input – Output + Generation – Consumption = Accumulation
  3. C
    Generation – Consumption = Accumulation
  4. D
    Input + Output = Accumulation
Question 24Single Answer
In a steady-state system, accumulation term is?
  1. A
    Positive
  2. B
    Zero
  3. C
    Negative
  4. D
    Varies
Question 25Single Answer
Material balance with recycle is solved by?
  1. A
    Algebraic equation
  2. B
    Iteration method
  3. C
    All of the above
  4. D
    Graphical method
Question 26Single Answer
Purge stream in a recycle system is used to?
  1. A
    None of these
  2. B
    Increase conversion
  3. C
    Reduce reaction rate
  4. D
    Control accumulation of inert
Question 27Single Answer
Heat of reaction is?
  1. A
    Energy required for mixing
  2. B
    Energy released or absorbed during chemical reaction
  3. C
    Kinetic energy of molecules
  4. D
    Thermal conductivity
Question 28Single Answer
Adiabatic flame temperature is?
  1. A
    Temperature of products when no heat is lost to surroundings
  2. B
    Maximum reaction temperature
  3. C
    Temperature of reactants
  4. D
    Ambient temperature
Question 29Single Answer
Material balance for gas phase reaction uses?
  1. A
    All of the above
  2. B
    Mole fraction
  3. C
    Ideal gas law
  4. D
    Volume flow rate
Question 30Single Answer
Material balance with chemical reaction includes?
  1. A
    Generation term
  2. B
    Consumption term
  3. C
    All of these
  4. D
    Accumulation term
Question 31Single Answer
For perfect gas, the molar volume at standard temperature and pressure is?
  1. A
    20 l/mol
  2. B
    24 l/mol
  3. C
    22.4 l/mol
  4. D
    18 l/mol
Question 32Single Answer
Material balance on a component in steady state is?
  1. A
    Input + Output = 0
  2. B
    Input – Output ± Generation = 0
  3. C
    Input – Output = Generation
  4. D
    None of these
Question 33Single Answer
Recycle ratio is defined as?
  1. A
    Input / Output
  2. B
    Fresh feed / Recycled stream
  3. C
    Output / Input
  4. D
    Recycled stream / Fresh feed
Question 34Single Answer
Energy balance equation includes which of the following?
  1. A
    Sensible heat
  2. B
    latent heat
  3. C
    Heat of reaction
  4. D
    All of these
Question 35Single Answer
In material balance, bypass stream?
  1. A
    Goes through reactor
  2. B
    Skips the reactor
  3. C
    Increases conversion
  4. D
    None of these
Question 36Single Answer
limiting reactant is?
  1. A
    Catalyst
  2. B
    Reactant in excess
  3. C
    Reactant completely consumed first
  4. D
    Product
Question 37Single Answer
Energy balance for an adiabatic system neglects?
  1. A
    Heat loss
  2. B
    Work done
  3. C
    Enthalpy change
  4. D
    All of these
Question 38Single Answer
Heat of combustion is?
  1. A
    Kinetic energy
  2. B
    Heat absorbed
  3. C
    Heat released per mole of fuel burnt
  4. D
    None of these
Question 39Single Answer
Material balance for multiple reactions considers?
  1. A
    Accumulation
  2. B
    Stoichiometry of all reactions
  3. C
    Recycle
  4. D
    Only input
Question 40Single Answer
Adiabatic flame temperature depends on?
  1. A
    All of these
  2. B
    Initial temperature
  3. C
    Heat capacity
  4. D
    Reactants composition
Question 41Single Answer
Fluid is defined as a substance which?
  1. A
    Resists deformation
  2. B
    Can sustain shear stress indefinitely
  3. C
    Has fixed shape
  4. D
    Deforms continuously under applied shear stress
Question 42Single Answer
Which of the following is a property of an incompressible fluid?
  1. A
    Density remains constant
  2. B
    Density changes with pressure
  3. C
    Volume changes significantly with pressure
  4. D
    Pressure is zero
Question 43Single Answer
Compressible flow is important when fluid velocity is greater than?
  1. A
    0.3 Mach
  2. B
    0.1 Mach
  3. C
    0.5 Mach
  4. D
    1 Mach
Question 44Single Answer
Newton’s law of viscosity states that shear stress is proportional to?
  1. A
    Velocity
  2. B
    Velocity gradient
  3. C
    Pressure
  4. D
    Density
Question 45Single Answer
SI unit of dynamic viscosity is?
  1. A
    Pa·s
  2. B
    Stokes
  3. C
    Poise
  4. D
    N/m
Question 46Single Answer
Kinematic viscosity is the ratio of?
  1. A
    Density to viscosity
  2. B
    Velocity to viscosity
  3. C
    Pressure to density
  4. D
    Viscosity to density
Question 47Single Answer
Laminar flow generally occurs at Reynolds number less than?
  1. A
    2000
  2. B
    1000
  3. C
    4000
  4. D
    10000
Question 48Single Answer
Turbulent flow is characterized by?
  1. A
    Smooth streamlines
  2. B
    No mixing
  3. C
    Zero inertia
  4. D
    Random velocity fluctuations
Question 49Single Answer
Reynolds number is the ratio of?
  1. A
    Gravity force to inertia force
  2. B
    Viscous force to pressure force
  3. C
    Pressure force to gravity force
  4. D
    Inertial force to viscous force
Question 50Single Answer
Equation of continuity is based on conservation of?
  1. A
    Energy
  2. B
    Mass
  3. C
    Momentum
  4. D
    Pressure
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