Chemical Engineering Mcqs

Sub zero treatment of steel is done to____________________?
  • (A)  Suppress martensite transformation
  • (B)  Enhance its working performance in sub zero atmosphere
  • (C)  Reduce the retained austenite in hardened steel
  • (D)  Induce temper brittleness after its hardening
Dowtherm is a____________________?
  • (A)  High temperature heating medium (a petroleum product)
  • (B)  Product of coal tar distillation
  • (C)  Very heat sensitive material
  • (D)  None of these