Chemical Engineering Mcqs

Chemical engineering plant cost index is used for finding the present cost of a particular chemical plant, if the cost of similar plant at some time in the past is known. The present cost of the plant = original cost × (index value at present/ index value at time original cost was obtained). The most major component of this cost index is____________________?
  • (A)  Fabricated equipment and machinery
  • (B)  Process instruments and control
  • (C)  Pumps and compressor
  • (D)  Electrical equipments and material
Pick out the wrong statement?
  • (A)  Ductile fracture of a stressed material, which exhibits a large plastic deformation is commonly caused by the formation and coalescence of voids in the necked region
  • (B)  Brittle fracture is caused by the propagation of pre-existing cracks in the material and involves minimum plastic deformation
  • (C)  Fatigue fracture of a material is always brittle in nature and takes place due to the existence of line imperfections
  • (D)  Brittle materials are generally tested in tension
Pick out the wrong statement ?
  • (A)  The equivalent stiffness of two springs (of equal stiffness ‘S’) in series is S/2 while in parallel is 2S
  • (B)  For a helical spring, deflection is proportional to D3 (D = mean coil diameter) or d4 (d = wire diameter)
  • (C)  Crushing load or columns is less than the buckling load
  • (D)  Modulus of resilience is proportional to (stress at elastic limit)2