Process Equipment and Plant Design Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter. 1/50th 1/20th 1/30th 1/10th 1/50th 1/20th 1/30th 1/10th ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for Creating turbulence Fixing the tubes Increasing pressure drop Reducing scale deposition Creating turbulence Fixing the tubes Increasing pressure drop Reducing scale deposition ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of (1.2)3/5 (1.2)3/2 (1.2)5/3 (1.2)2/3 (1.2)3/5 (1.2)3/2 (1.2)5/3 (1.2)2/3 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design A pipe is generally made of circular cross-section, because a circular cross-section has the Lowest surface area requirement for a given volume None of these Higher structural strength Both A & B Lowest surface area requirement for a given volume None of these Higher structural strength Both A & B ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design The function of manholes provided in the shell of a distillation column is to Keep a check on the liquid gradient over the plate by direct visual observation Give access to the individual trays for cleaning, maintenance and installation Guard against foaming & entrainment by dumping antifoaming agent through it All of these Keep a check on the liquid gradient over the plate by direct visual observation Give access to the individual trays for cleaning, maintenance and installation Guard against foaming & entrainment by dumping antifoaming agent through it All of these ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design 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? To reduce the induced vibration in the tubes To provide support to the tube bundle To increase the residence time of shell side fluid To increase the tube side heat transfer co-efficient by inducing turbulence To reduce the induced vibration in the tubes To provide support to the tube bundle To increase the residence time of shell side fluid To increase the tube side heat transfer co-efficient by inducing turbulence ANSWER DOWNLOAD EXAMIANS APP
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