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- Question
Temporary hardness of water is caused by the presence of
Options- A. chlorides of calcium and magnesium
- B. sulfates of calcium and magnesium
- C. bicarbonates of calcium and magnesium
- D. carbonates of sodium and potassium
- Correct Answer
- bicarbonates of calcium and magnesium
- 1. For laminar flow, Reynolds number is correlated with power number as (where K, a constant which depends on the container geometry and shape of stirrer; Rei is Reynolds number for agitator; Di, stirrer diameter and N, stirrer speed)
Options- A. Np = K(Rei)-1
- B. Np = N2Di(Rei)-1
- C. Np = K(Rei)
- D. Np = KNDi(Rei)-2 Discuss
- 2. The main function of the dimples provided in the cooling jacket is to
Options- A. increase the level of turbulence of the cooling water in the jacket
- B. increase the residence time of the cooling water in the jacket
- C. increase the cooling water-jacket wall boundary layer size
- D. all of the above Discuss
- 3. In a tall reactor, oxygen transfer rates will be
Options- A. highest at the surface of the reactor
- B. highest at the base of the reactor
- C. highest in the middle of the reactor
- D. the same throughout the reactor Discuss
- 4. Milk digestibility is improved by using
Options- A. RNase
- B. lactase
- C. ?-amylase
- D. none of these Discuss
- 5. The power required by an agitator operating in a gas-sparged system is
Options- A. lesser than the power required by an impeller in operating at same speed in a gas free system
- B. more than the power required by an impeller in operating at same speed in a gas free system
- C. same as the power required by an impeller in operating at same speed in a gas free system
- D. none of the above Discuss
- 6. The monod model predicts that the specific growth rate
Options- A. will increase with the concentration of the growth limiting substrate until it reaches a maximum value
- B. will decrease with the concentration of the growth limiting substrate
- C. will increase with the concentration of the growth limiting substrate
- D. does not depend on growth limiting substrate Discuss
- 7. The ratio of the amount of a protein present in a sample, which is used as a measure of purification, is known as
Options- A. specific activity
- B. relative activity
- C. purity ratio
- D. all of these Discuss
- 8. Which category of enzymes belongs to class 5 in the international classification?
Options- A. Hydrolases
- B. Isomerases
- C. Oxido-reductases
- D. Cyclase Discuss
- 9. The water being used in dairy industry should contain not more than
Options- A. 5 proteolytic and/or lipolytic organisms per ml
- B. 10 proteolytic and/or lipolytic organisms per ml
- C. 15 proteolytic and/or lipolytic organisms per ml
- D. 20 proteolytic and/or lipolytic organisms/ml Discuss
- 10. The initial velocity, V0, of an enzyme catalyzed reaction reaches Vmax as
Options- A. [S] = KM
- B. [S] = 10 * KM
- C. 1/[S] = 1/KM
- D. 1/[S] ? 0 Discuss
More questions
Correct Answer: Np = K(Rei)-1
Correct Answer: increase the level of turbulence of the cooling water in the jacket
Correct Answer: highest at the base of the reactor
Correct Answer: lactase
Correct Answer: lesser than the power required by an impeller in operating at same speed in a gas free system
Correct Answer: will increase with the concentration of the growth limiting substrate until it reaches a maximum value
Correct Answer: specific activity
Correct Answer: Isomerases
Correct Answer: 5 proteolytic and/or lipolytic organisms per ml
Correct Answer: 1/[S] ? 0
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