Exam preparation MCQs with answers

Practice Pakistan's most useful MCQs for competitive exams

Prepare for NTS, PPSC, FPSC and subject-wise tests with fresh multiple choice questions, clear options and quick answer reveal.

Latest MCQs

Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele’s method, this method_________________?
  • (A)  is more accurate in finding the number of equilibrium stages
  • (B)  accounts for the enthalpy changes in the process
  • (C)  Facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in this method
  • (D)  All A,
The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles ?
  • (A)  To increase the residence time of shell side fluid
  • (B)  To provide support to the tube bundle
  • (C)  To reduce the induced vibration in the tubes
  • (D)  To increase the tube side heat transfer co-efficient by inducing turbulence