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ChE Enhancement Program 2
Fluid Flow, Heat Transfer and Mass Transfer (Part 1)
Flow in Pipes and Channels
1. Calculate the hydraulic mean diameter of the annular space
between a ! mm and a
"! mm tube.
#. " mm $. 1! mm C. 1" mm %. &! mm&. !.!1" m's of acetic
acid is pumped throuh a *" mm diameter hori+ontal pipe *! m
lon. hat is the pressure drop in the pipe- iscosity of acid /
&." m0sm&, density of
acid / 1!! 2m', and rouhness of pipe surface / 31!4"m.
#. 1!!." 20m& $. 11. 20m& C. 1"5.* 20m& %.
&*.20m&
'. 6i7en strenth of pipe is 1!!!! psi and wor2in pressure of !!
psi, 8nd the
schedule number.
#. 9chedule ! $. 9chedule 5! C. 9chedule 1! %. 9chedule "
Situation 1:9ulphuric acid is pumped at ' 2s throuh a ! m lenth
of smooth &" mm
pipe. %ensity of acid is 15! 2m'and 7iscosity of acid is
&"m0 sm&.
. Calculate the drop in pressure.
#. *" 20m& $. 1 20m& C. 5!20m& %. :' 20m&
". ;f the pressure drop falls by one half, what will be the
new
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1!. hat is the speci8c 7olume at the upstream end of the
pipe-
#. !.5 m'2 $. !.&" m'2 C. !.1& m'2 %. !.*1 m'211. hat is
the
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&. For 0ewtonian ual to shear rate of deformation%. # linear
function of the shear rate of deformation
&". # hypothetical as or li>uid which o?ers no resistance
to shear and therefore has+ero 7iscosity
#. Perfect uids and ases ta2e the followin characteristic(s) of
their contents.
#. olume $. 9hapeC. 9hape and 7olume %. 0either shape nor
7olume
'&. #lcohol 8nds use in manometers asK
#. ;t pro7ides a suitable meniscus for the inclined tube$. ;ts
density bein less can pro7ide loner lenth for a pressure di?erence,
thus more
accuracy can be obtainedC. # and $ are correct%. Cheap and
easily a7ailable
''. hich of the followin statements about a 0ewtonian
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#. Compressibility $. %ensityC. $ul2 modulus %. Thermal
conducti7ity
'*. Friction factor for both laminar and turbulent uids $.
9peci8c ra7ity of solidsC. 9peci8c ra7ity of ases %. Gelati7e
humidity
1. Jri8ce refers to an openin
#. ith closed perimeter and or reular form throuh which
water
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C. #t a distance appro3imately e>ual to the diameter of the
ori8ce%. #t a distance appro3imately twice the diameter of the
ori8ce
:. # substance that is able to
