Process Equipment and Plant Design Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent. 20 35 5 55 20 35 5 55 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)5/3 (1.2)3/2 (1.2)3/5 (1.2)2/3 (1.2)5/3 (1.2)3/2 (1.2)3/5 (1.2)2/3 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by (ph - dt)/ph (ph - dh)/ph (ph - dh)/dh (ph - dh . dt/2)/ph (ph - dt)/ph (ph - dh)/ph (ph - dh)/dh (ph - dh . dt/2)/ph ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Friction factor for turbulent flow in a new pipe is given by f = 25/NRe f = 0.22 NRe0.05 f = 0.04/NRe0.16 f = 16/NRe f = 25/NRe f = 0.22 NRe0.05 f = 0.04/NRe0.16 f = 16/NRe ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Bubble cap plate column is A continuous contactor A finite stage contactor Used only for distillation, not for absorption A differential stage contactor A continuous contactor A finite stage contactor Used only for distillation, not for absorption A differential stage contactor ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around 0.4-0.6 0.55-0.85 0.1-0.2 0.35-0.75 0.4-0.6 0.55-0.85 0.1-0.2 0.35-0.75 ANSWER DOWNLOAD EXAMIANS APP
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