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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. |
Q1 ⇒ The collection efficiency by diffusion increases with both (a) and (b) [other wrong options] [Discuss in forum] decreasing particle size decreasing air velocity increasing particle size |
Q2 ⇒ The typical size of particles collected by diffusion mechanism is <0.5μm [other wrong options] [Discuss in forum] <0.25μm <0.75μm <1μm |
Q3 ⇒ Sterilization can be carried out by all of these [other wrong options] [Discuss in forum] heat radiation chemical agents |
Q4 ⇒ Typical aeration rates for aerobic fermentation are 0.5 - 1.0 vvm [other wrong options] [Discuss in forum] 0 - 0.5 vvm 1.0 - 1.5 vvm 1.5 - 2.0 vvm |
Q5 ⇒ The filter material used for air filtration system is/are all of the above [other wrong options] [Discuss in forum] glass wool glass fibre norite |
Q6 ⇒ In sterilization process, spore of which of the following organism is considered as control? Bacillus stearothermophilus [other wrong options] [Discuss in forum] Bacillus subtilis Clostridium botulinum Aspergillus niger |
Q7 ⇒ For laminar flow of Newtonian fluid through a smooth round pipe, the ratio of average fluid velocity to the maximum velocity is 0.5 [other wrong options] [Discuss in forum] 0.75 0.87 0.37 |
Q8 ⇒ The moist heat is more effective than the dry heat because the intrinsic heat resistance of vegetative cells is greatly increased in a dry state [other wrong options] [Discuss in forum] decreased in a dry state increased in a wet state decreased in a wet state |
Q9 ⇒ The relationship between the del factor, temperature and time is given as Δ = A.t. e-E/RT [other wrong options] [Discuss in forum] Δ = 1/(A.t. e-E/RT) Δ = A.t. eE/RT Δ = A.t.T |
Q10 ⇒ The mechanism of air filtration in fibrous filter is all of these [other wrong options] [Discuss in forum] electrostatic attraction impaction interception |
Q11 ⇒ The collection efficiency by impaction increases with both (a) and (b) [other wrong options] [Discuss in forum] increasing particle diameter increasing air flow velocity increasing particle size |
Q12 ⇒ The K used in the equation for X10=2.303/K depends upon both (a) and (b) [other wrong options] [Discuss in forum] nature of the filter material linear velocity of the air passing through filter thickness of the filter |
Q13 ⇒ The specific death rate of an organism can be expressed as ln 2/D [other wrong options] [Discuss in forum] D/ln2 D.ln2 2.0.3/ln2 |
Q14 ⇒ The collection efficiency by interception increases with the increasing particle size [other wrong options] [Discuss in forum] increasing particle diameter increasing air flow velocity both (a) and (b) |
Q15 ⇒ The value of K increases to an optimum with increase in air velocity and decreases on further increase of air velocity [other wrong options] [Discuss in forum] increases with increase in air velocity decreases with increase in air velocity none of these |
Q16 ⇒ The heated medium passes through a holding section, which is usually maintained in adiabatic conditions [other wrong options] [Discuss in forum] isothermal conditions isotropic conditions isobaric conditions |
Q17 ⇒ The interception efficiency can be expressed as (where dp is the particle diameter and Dc cylindrical collection diameter) dp/Dc [other wrong options] [Discuss in forum] dp x Dc dp/Dc x 100 dpDc/100 |
Q18 ⇒ For indirect heating, the plate and frame heat exchanger is generally more effective than the shell and tube heat transfer due to its larger heat transfer area [other wrong options] [Discuss in forum] smaller heat transfer area lesser cost more number of plates |
Q19 ⇒ Model proposed by the Friedlander, correlating the air filtration efficiency by impaction can be expressed as (where NSt is the Stokes number) ηimp = 0.075NSt1.2 [other wrong options] [Discuss in forum] ηimp = 0.75NSt1.2 ηimp = 0.25NSt1.2 ηimp = 0.025NSt1.2 |
Q20 ⇒ The highest temperature which appears to be feasible for batch sterilization is 121°C [other wrong options] [Discuss in forum] 100°C 105°C 130°C |
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