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Home⇒ Medical Science⇒ Bochemical Engineering⇒ Sterilization
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ The sterilization method depends both (a) and (b) [other wrong options] [Discuss in forum] nature of additive volume and feed rate none of these |
Q22 ⇒ The deviation from ideal plug flow due to axial mixing can be described by the dispersion model [other wrong options] [Discuss in forum] Langmuir model Friedlander model Pasceri model |
Q23 ⇒ Glass fibers are favorable as a filter medium because they give a lower pressure drop and are less liable to wetting or combustion [other wrong options] [Discuss in forum] more pressure drop and are less liable to wetting or combustion lower pressure drop and are more liable to wetting or combustion more pressure drop and are more liable to wetting or combustion |
Q24 ⇒ Analogus to the molecular diffusion, the x-directional flux of microorganisms suspended in a medium due to the axial mixing can be represented as (where Jn is flux component 'n', cn is concentration of'n') Jn = -D dcn/dx [other wrong options] [Discuss in forum] Jn = -dcn/dx Jn = dcn/dx Jn = D dcn/dx |
Q25 ⇒ The X90 value for a filtration system is the depth required to reduce population by 90% [other wrong options] [Discuss in forum] the time required to reduce microbial population by 90% the time required to traverse survivor curve by one log cycle. the depth of the filter required to reduce population by 99% |
Q26 ⇒ The reduction of number of cells from 1010 to one will result into the del factor (Δ) of 23 [other wrong options] [Discuss in forum] 1 10 103 |
Q27 ⇒ The collection efficiency by the inertial impaction mechanism is the function of Stokes and Reynolds number [other wrong options] [Discuss in forum] Stokes and Schmidt number Grashoff and Reynolds number Stokes and Grashof number |
Q28 ⇒ The destruction of microorganisms by steam may be described as first order chemical reaction [other wrong options] [Discuss in forum] zero order chemical reaction second order chemical reaction none of these |
Q29 ⇒ The overall del factor (Δ) may be represented as Δoverall = Δheating + Δholding+ Δcooling [other wrong options] [Discuss in forum] Δoverall = Δheating + Δholding- Δcooling Δoverall = Δheating - Δholding+ Δcooling Δoverall = Δheating - Δholding- Δcooling |
Q30 ⇒ For the turbulent flow, the dispersion coefficient is correlated as a function of Reynolds number [other wrong options] [Discuss in forum] Sherwood number Schmidt number Grashof number |
Q31 ⇒ The heat conduction in dry air is less rapid than in steam [other wrong options] [Discuss in forum] more rapid than in steam similar to steam none of these |
Q32 ⇒ The radius of the filter with a depth of 14 cm required for a volumetric airflow rate of 10 m3/min is approximately 0.6 m [other wrong options] [Discuss in forum] 1.6 m 3 6 m |
Q33 ⇒ The del factor (Δ) increases as the final number of cells decreases [other wrong options] [Discuss in forum] increases zero constant |
Q34 ⇒ If the packing density (α) is defined as the volume of the fiber unit volume of filter bed, the velocity within the filter void space is equal to (where V is velocity in fluid void space and V0 is undisturbed fluid velocity) V = V0/(1-α) [other wrong options] [Discuss in forum] V-V0 = 1 - α V = V0(1 - α) V = V0/(1 + α) |
Q35 ⇒ The efficiency of fibrous filter by combined mechanism is given by(where ηimp,ηint,ηdif are the efficiencies by impaction, interception and diffusion respectively) 1 - ηimpηintηdif [other wrong options] [Discuss in forum] 1 - (1 - ηimp)(1 - ηint)( 1 - ηdif) 1 - ( ηimpηint/ηdif) None of the above |
Q36 ⇒ The mechanical means of accomplishing sterilization of fermentation media/equipment is ultrasonic [other wrong options] [Discuss in forum] radiation chemical agents none of these |
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