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Latest DRDO CEPTAM Senior Technical Assistant Metallurgical Exam Question (Objective Questions), MCQ in English

Subjects : Metallurgical Engineering

Question Bank DRDO CEPTAM Senior Technical Assistant (Metallurgical) Tier 2 Exam - English
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Metallurgical Engineering

Question 1Single Answer
According to the First Law of Thermodynamics, what is conserved in an isolated system?
  1. A
    Entropy
  2. B
    Internal energy
  3. C
    Gibbs free energy
  4. D
    Enthalpy
Question 2Single Answer
The Second Law of Thermodynamics implies that:
  1. A
    Energy can be created in a closed system
  2. B
    Entropy of an isolated system never decreases
  3. C
    Heat flows from cold to hot spontaneously
  4. D
    Enthalpy remains constant in all processes
Question 3Single Answer
In an irreversible process, the entropy change of the universe is:
  1. A
    Zero
  2. B
    Positive
  3. C
    Negative
  4. D
    Equal to the system’s entropy change
Question 4Single Answer
The Helmholtz free energy (A) is defined as:
  1. A
    A = U + TS
  2. B
    A = H + TS
  3. C
    A = U - TS
  4. D
    A = H - TS
Question 5Single Answer
For a reversible adiabatic process, which quantity remains constant?
  1. A
    Enthalpy
  2. B
    Entropy
  3. C
    Gibbs free energy
  4. D
    Internal energy
Question 6Single Answer
In a metallurgical process, the spontaneity of a reaction at high temperature is primarily governed by:
  1. A
    Entropy change
  2. B
    Enthalpy change
  3. C
    Internal energy change
  4. D
    Volume change
Question 7Single Answer
In a metallurgical roasting process, the entropy change is typically positive due to:
  1. A
    Decrease in temperature
  2. B
    Reduction in system volume
  3. C
    Formation of gaseous products
  4. D
    Increase in internal energy
Question 8Single Answer
The Gibbs free energy (G) is defined as:
  1. A
    G = U + PV - TS
  2. B
    G = H + TS
  3. C
    G = H - TS
  4. D
    G = U - PV + TS
Question 9Single Answer
For a reversible isothermal compression of an ideal gas, the work done is:
  1. A
    Positive
  2. B
    Equal to the heat transfer
  3. C
    Zero
  4. D
    Negative
Question 10Single Answer
For a reaction at constant volume, the heat absorbed is equal to:
  1. A
    Change in internal energy
  2. B
    Change in Gibbs free energy
  3. C
    Change in enthalpy
  4. D
    Change in Helmholtz free energy
Question 11Single Answer
The spontaneity of a metallurgical process at low temperature is primarily driven by:
  1. A
    Entropy change
  2. B
    Volume change
  3. C
    Internal energy change
  4. D
    Enthalpy change
Question 12Single Answer
The First Law of Thermodynamics is a statement of:
  1. A
    Entropy conservation
  2. B
    Energy conservation
  3. C
    Enthalpy conservation
  4. D
    Gibbs free energy conservation
Question 13Single Answer
For a reversible adiabatic expansion of an ideal gas, the temperature:
  1. A
    Increases
  2. B
    Remains constant
  3. C
    Decreases
  4. D
    Equals the surroundings
Question 14Single Answer
The Gibbs free energy change for a reaction at equilibrium is:
  1. A
    Positive
  2. B
    Zero
  3. C
    Negative
  4. D
    Equal to the enthalpy change
Question 15Single Answer
In a metallurgical process, the entropy change for the formation of a solid from a gas is typically:
  1. A
    Positive
  2. B
    Equal to the enthalpy change
  3. C
    Zero
  4. D
    Negative
Question 16Single Answer
The enthalpy of a system is defined as:
  1. A
    H = U + PV
  2. B
    H = U - PV
  3. C
    H = U + TS
  4. D
    H = U - TS
Question 17Single Answer
In a metallurgical oxidation reaction, the entropy change is typically:
  1. A
    Equal to the internal energy change
  2. B
    Negative due to gas consumption
  3. C
    Zero due to constant temperature
  4. D
    Positive due to gas formation
Question 18Single Answer
The Second Law of Thermodynamics implies that in an isolated system:
  1. A
    Entropy increases
  2. B
    Energy decreases
  3. C
    Enthalpy remains constant
  4. D
    Gibbs free energy increases
Question 19Single Answer
The Gibbs free energy change for a non-spontaneous reaction is:
  1. A
    Positive
  2. B
    Negative
  3. C
    Zero
  4. D
    Equal to the entropy change
Question 20Single Answer
In a reversible isothermal expansion, the change in entropy of the system is:
  1. A
    Negative
  2. B
    Equal to the enthalpy change
  3. C
    Zero
  4. D
    Positive
Question 21Single Answer
For a system at constant temperature and volume, the spontaneity is determined by:
  1. A
    Gibbs free energy
  2. B
    Helmholtz free energy
  3. C
    Enthalpy
  4. D
    Internal energy
Question 22Single Answer
The entropy change for a reversible isothermal compression of an ideal gas is:
  1. A
    Positive
  2. B
    Zero
  3. C
    Negative
  4. D
    Equal to the work done
Question 23Single Answer
In a metallurgical process, the enthalpy change for an exothermic reaction is:
  1. A
    Positive
  2. B
    Negative
  3. C
    Zero
  4. D
    Equal to the entropy change
Question 24Single Answer
The Second Law of Thermodynamics prohibits:
  1. A
    Energy conservation
  2. B
    Gibbs free energy decrease
  3. C
    Enthalpy increase in a closed system
  4. D
    Heat flow from cold to hot without work
Question 25Single Answer
In a metallurgical roasting process, the entropy increase is primarily due to:
  1. A
    Formation of gaseous products
  2. B
    Decrease in system volume
  3. C
    Reduction in temperature
  4. D
    Increase in internal energy
Question 26Single Answer
For a reversible isothermal process, the change in Gibbs free energy is:
  1. A
    Positive
  2. B
    Zero
  3. C
    Negative
  4. D
    Equal to the work done
Question 27Single Answer
The entropy change for a reversible adiabatic process is:
  1. A
    Zero
  2. B
    Negative
  3. C
    Positive
  4. D
    Equal to the enthalpy change
Question 28Single Answer
The Helmholtz free energy change for a spontaneous process at constant T and V is:
  1. A
    Positive
  2. B
    Equal to the enthalpy change
  3. C
    Zero
  4. D
    Negative
Question 29Single Answer
For an ideal gas undergoing an isothermal compression, the change in internal energy is:
  1. A
    Positive
  2. B
    Zero
  3. C
    Negative
  4. D
    Equal to the work done
Question 30Single Answer
In a metallurgical process, the entropy change for the formation of a liquid from a solid is typically:
  1. A
    Negative
  2. B
    Equal to the internal energy change
  3. C
    Zero
  4. D
    Positive
Question 31Single Answer
In a metallurgical process, the enthalpy change for an endothermic reaction is:
  1. A
    Negative
  2. B
    Positive
  3. C
    Zero
  4. D
    Equal to the entropy change
Question 32Single Answer
For a system at constant temperature and pressure, the spontaneity is determined by:
  1. A
    Helmholtz free energy
  2. B
    Internal energy
  3. C
    Enthalpy
  4. D
    Gibbs free energy
Question 33Single Answer
In a metallurgical roasting process, the entropy increase is primarily due to:
  1. A
    Formation of gaseous products
  2. B
    Decrease in system volume
  3. C
    Reduction in temperature
  4. D
    Increase in internal energy
Question 34Single Answer
For a reversible isothermal process, the change in Helmholtz free energy is:
  1. A
    Negative
  2. B
    Positive
  3. C
    Zero
  4. D
    Equal to the work done
Question 35Single Answer
The entropy change for a reversible adiabatic process is:
  1. A
    Positive
  2. B
    Negative
  3. C
    Zero
  4. D
    Equal to the enthalpy change
Question 36Single Answer
In a metallurgical process, the enthalpy change for an endothermic reaction is:
  1. A
    Zero
  2. B
    Negative
  3. C
    Positive
  4. D
    Equal to the entropy change
Question 37Single Answer
In a metallurgical roasting process, the entropy increase is primarily due to:
  1. A
    Decrease in system volume
  2. B
    Increase in internal energy
  3. C
    Reduction in temperature
  4. D
    Formation of gaseous products
Question 38Single Answer
For a reversible isothermal process, the change in Helmholtz free energy is:
  1. A
    Positive
  2. B
    Negative
  3. C
    Zero
  4. D
    Equal to the work done
Question 39Single Answer
In extractive metallurgy, the primary purpose of roasting is:
  1. A
    Convert sulfides to oxides
  2. B
    Reduce metal oxides
  3. C
    Melt the ore
  4. D
    Remove carbon impurities
Question 40Single Answer
The primary source of heat in a blast furnace is:
  1. A
    Friction heating
  2. B
    Electrical heating
  3. C
    Nuclear reactions
  4. D
    Combustion of coke
Question 41Single Answer
In physical metallurgy, the primary strengthening mechanism in martensitic steel is:
  1. A
    Solid solution strengthening
  2. B
    Dislocation strengthening
  3. C
    Precipitation hardening
  4. D
    Grain boundary strengthening
Question 42Single Answer
The primary purpose of flux in steelmaking is to:
  1. A
    Increase carbon content
  2. B
    Enhance electrical conductivity
  3. C
    Remove impurities as slag
  4. D
    Reduce melting point
Question 43Single Answer
In mechanical metallurgy, the Hall-Petch relationship describes the dependence of yield strength on:
  1. A
    Precipitate size
  2. B
    Dislocation density
  3. C
    Grain size
  4. D
    Solute concentration
Question 44Single Answer
The primary advantage of vacuum arc remelting (VAR) is:
  1. A
    Improved cleanliness of metal
  2. B
    Increased carbon content
  3. C
    Reduced melting point
  4. D
    Enhanced grain size
Question 45Single Answer
In mineral processing, the primary purpose of froth flotation is:
  1. A
    Size reduction
  2. B
    Removal of water
  3. C
    Separation of valuable minerals
  4. D
    Melting of ore
Question 46Single Answer
The primary role of slag in a blast furnace is to:
  1. A
    Remove impurities
  2. B
    Increase iron content
  3. C
    Enhance electrical conductivity
  4. D
    Reduce melting point
Question 47Single Answer
In physical metallurgy, the primary cause of work hardening is:
  1. A
    Grain growth
  2. B
    Precipitation formation
  3. C
    Dislocation entanglement
  4. D
    Phase transformation
Question 48Single Answer
The primary purpose of annealing in metallurgy is to:
  1. A
    Increase hardness
  2. B
    Reduce internal stresses
  3. C
    Enhance corrosion resistance
  4. D
    Increase carbon content
Question 49Single Answer
In extractive metallurgy, the primary function of a reducing agent is to:
  1. A
    Increase oxygen content
  2. B
    Remove oxygen from metal oxides
  3. C
    Enhance slag formation
  4. D
    Reduce melting point
Question 50Single Answer
The primary advantage of continuous casting over ingot casting is:
  1. A
    Higher carbon content
  2. B
    Reduced mechanical properties
  3. C
    Increased grain size
  4. D
    Improved surface quality
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