Questions and answers for exam Preparation

MCQs

Total Questions : 188 | Page 5 of 19 pages

Question 41. Statement 1: Brookfield viscometer is an example of Coaxial Cylinder Viscometer.
Statement 2: Working principle of a Brookfield viscometer: Two coaxial cylinders. Liquid is filled in between them. The viscosity produces torque which is directly proportional to the shear stress.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option B. -> True, True
Answer: (b).True, True

Question 42. Statement 1: Evaporation is considered a mass and heat transfer operation.
Statement 2: After evaporation, solids are left behind.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option C. -> False, False
Answer: (c).False, False

Question 43. Statement 1: Considering the equation, μ_a= τ/γ = Kγ⁽ⁿ⁻¹⁾ , for pseudo plastic fluids, n<1 and they’re called Shear thinning liquids and dilatant fluids are called Shear thickening liquids as n>1.
Statement 2: Cooked starch solution is a Shear thinning liquid and dairy cream is a Shear thickening liquid.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option A. -> True, False
Answer: (a).True, False

Question 44. Which of the following is a name of an actual viscometer?

Capillary tube
Plate and Cone
Coaxial Cylinder
All of the mentioned

Discuss Question

Answer: Option D. -> All of the mentioned
Answer: (d).All of the mentioned

Question 45. Statement 1: Brookfield viscometer is very robust, is supported by software and even shows values of K and n, but, sometimes particles suspended in the fluid cause problems.
Statement 2: Drawbacks of plate and cone viscometer: edge-effects, turbulence and temperature effects.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option B. -> True, True
Answer: (b).True, True

Question 46. Statement 1: In a multiple effect evaporator, the overall temperature drop is equal to the individual drops at each step.
Statement 2: In a multiple effect evaporator, the total area is equal to the sum of the individual areas.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option C. -> False, False
Answer: (c).False, False

Question 47. Statement 1: Boiling point rise is due to the colligative properties due to the presence of solid particles in the solvent.
Statement 2: Boiling point rise is due to the increase in pressure at the bottom of the solvent due to hydro-static head of the column.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option B. -> True, True
Answer: (b).True, True

Question 48. Statement 1: Duhring’s rule states that the ratio of temperatures at which two solutions have the same vapor pressure is constant.
Statement 2: Duhring’s rule states that the boiling point of a solution is a linear function of the boiling point of pure water at the same pressure.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option B. -> True, True
Answer: (b).True, True

Question 49. Which of the following is true while concentrating jams?

They’re sensitive to heat
Evaporation process for jams is carried out under vacuum
At vacuum, the boiling point decreases
All of the mentioned

Discuss Question

Answer: Option D. -> All of the mentioned
Answer: (d).All of the mentioned

Question 50. During evaporation of edible solutions, the BPR-boiling point rise should be _____ and the foaming and scale formation should be _____