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- Question
The moist heat is more effective than the dry heat because the intrinsic heat resistance of vegetative cells is greatly
Options- A. increased in a dry state
- B. decreased in a dry state
- C. increased in a wet state
- D. decreased in a wet state
- Correct Answer
- increased in a dry state
- 1. Yield coefficient represents
Options- A. total biomass or product produced
- B. conversion efficiency of a substrate into product
- C. conversion rate of a substrate into biomass or product
- D. production time of biomass or product Discuss
- 2. The purest form of naturally occurring water is
Options- A. rain water
- B. river water
- C. pond water
- D. well water Discuss
- 3. Which of the following impellers are used for wide range of viscosities?
Options- A. paddles
- B. turbines
- C. propellers
- D. none of these Discuss
- 4. Damkohler number(NDa) is
Options- A. the ratio of the maximum reaction rate to the maximum mass transfer rate
- B. the ratio of the minimum reaction rate to the maximum mass transfer rate
- C. the ratio of the maximum reaction rate to the minimum mass transfer rate
- D. the ratio of the minimum reaction rate to the minimum mass transfer rate Discuss
- 5. If the specific growth rate, ?. is constant with time during the exponential growth period, the equation correlating bacterial number density Cn), cell number concentration with respect to time can be expressed as
Options- A. Cn= Cn0 exp[? (t - t0)]
- B. Cn0 = Cn exp[? (t - t0)]
- C. Cn/Cn0 =(1/?)exp(t-t0)
- D. Cn0 / Cn = (1/?)exp(t-t0) Discuss
- 6. Citrus juice debittering can be carried out using
Options- A. limoninase
- B. inulinase
- C. anthocyanase
- D. None of these Discuss
- 7. Biological oxidation processes usually referred as biological treatment, are the most common form of
Options- A. primary treatment
- B. secondary treatment
- C. tertiary treatment
- D. all of these Discuss
- 8. Which of the following will have the largest interfacial area per unit volume?
Options- A. A bubble with a diameter of 1 mm
- B. A bubble with a diameter of 5 mm
- C. A bubble with a diameter of 15 mm
- D. A bubble with a diameter of 50 mm Discuss
- 9. Bubble column reactor has
Options- A. large height to diameter ratio
- B. small height to diameter ratio
- C. large diameter to height ratio
- D. small diameter to height ratio Discuss
- 10. Which of the following is taken as an assumption in the distributed model?
Options- A. The reaction occurs at every position and the kinetics of the reaction are of the same form as observed for free enzyme.
- B. Mass transfer through the immobilized enzyme occurs via molecular diffusion
- C. There is no mass transfer limitation at the outside surface of the spherical immobilized enzyme
- D. All of the above Discuss
More questions
Correct Answer: conversion efficiency of a substrate into product
Correct Answer: rain water
Correct Answer: turbines
Correct Answer: the ratio of the maximum reaction rate to the maximum mass transfer rate
Correct Answer: Cn= Cn0 exp[? (t - t0)]
Correct Answer: limoninase
Correct Answer: secondary treatment
Correct Answer: A bubble with a diameter of 1 mm
Correct Answer: large height to diameter ratio
Correct Answer: All of the above
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