Chemical Engineering MCQs

Page No. 204

pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be_________________?


a 0


b10


c7


d 14


View Answer 7

A pressure head of 320 metres of water in meters of CCl4 (sp.gr = 1.6) will be__________________?


a100


b200


c320


d160


View Answer 200

Which of the following quantities are computed by using the hydraulic radius for noncircular ducts ?


aVelocity and relative roughness


bHead loss and velocity


cReynold number, relative roughness and head loss


dReynolds number and friction factor



In a chemical process, the recycle stream is purged for______________________?


a Increasing the product yield


bEnriching the product


c Limiting the inerts


dHeat conservation



The pressure head of a flow meter remains constant for_________________?


aVenturimeter


bOrificemeter


cRotameter


dPitot tube


View Answer Rotameter

Which of the following gases will have the- highest kinetic energy per mole at the same pressure & temperature ?


aChlorine


bNitrogen


cEthane


dAll the gases will have the same KE



Pick out the Hagen-Poiseuille‟s equation ?


aΔp/ρ = 4f (L/D) (V2/2gc)


bΔp = 32 (μLV/gc. D2)


cΔp/L = 150 [(1 – ε)/ε3]. (μ.V0 2/g2cD)


dΔp/L = 1.75 [(1 – ε)/ε3]. (ρV0 2/gcDp)



If 1 Nm3 of O2 contains ‘N’ number of molecules, then number of molecules in 2Nm3 of SO2 will be_________________?


aN


bN/2


c 2N


d4N


View Answer 2N

The heat capacity of a substance is ____________________?


aGreater for liquid state than for solid state


b Lower for liquid state than for gaseous state


cHigher for solid state than for liquid state


dEqual for solid and liquid states below melting point



The total number of atoms in 8.5 gm of NH3 is _______________ × 1023?


a9.03


b3.01


c1.204


d 6.02


View Answer 9.03

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