AP PGECET 2026 Instrumentation Engineering Question Paper: Download Answer Key with Solutions

AP PGECET Questions

• 1.

  The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n-heptane and n-octane into pure compounds, each at 1 atm, is:
  

  • $-2RT \ln 0.5$
    
  • $2RT$
    
  • $-RT \ln 0.5$
    
  • $0.5RT$
    
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• 2.

  Digital signatures provide ________.
   

  • confidentiality
    
  • non-repudiation
    
  • key exchange
    
  • firewall bypass
    
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• 3.

  1 mole of Argon gas is heated at constant pressure from 200 K to 600 K.
  If \( C_p = 4\ \text{cal} \cdot \text{deg}^{-1} \cdot \text{mol}^{-1} \), then the change in entropy will be:
  (Given \( \ln 3 = 1.09 \))
  

  • 4.36 Cal.deg$^{-1}$mol$^{-1}$
    
  • 2.76 Cal.deg$^{-1}$mol$^{-1}$
    
  • 3.34 Cal.deg$^{-1}$mol$^{-1}$
    
  • 5.39 Cal.deg$^{-1}$mol$^{-1}$
    
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• 4.

  Why is the equilibrium constant (K) temperature-dependent?
  

  • Because $\Delta G^\circ$ depends on T
    
  • Because pressure affects K
    
  • Because entropy is temperature-independent
    
  • Because fugacity coefficients change with T
    
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• 5.

  The change in enthalpy of a system is related to the heat absorbed at a:
  

  • Constant volume
    
  • Constant temperature
    
  • Constant mole fraction
    
  • Constant pressure
    
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• 6.

  A balanced delta connected load of \( (8 + j6) \Omega \) per phase is connected to a 400 V, 50 Hz, three-phase supply lines. If the input power factor is to be improved to 0.9 by connecting a bank of star-connected capacitors, the required kVAR of the bank is _______.

  • 42.7
    
  • 10.2
    
  • 28.8
    
  • 38.4
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