Drying(Mass Transfer ) Questions and answers for exam Preparation

Question 1. The boiling point of the solvent is ______

Boiling solvent
Decoction
Leaching
None of the mentioned

Explanation:-

Answer: Option B. -> Decoction
Answer: (b).Decoction

Question 2. The removal of soluble materials from the solid is known as ________

Elution
Decoction
Extraction
None of the mentioned

Explanation:-

Answer: Option A. -> Elution
Answer: (a).Elution

Question 3. Leaching is generally used for cement industries.

True
False
May be True or False
Can't say

Explanation:-

Answer: Option B. -> False
Answer: (b).False

Question 4. Which of the following process can accelerate leaching?

Heating
Drying
Crushing
Crushing or grinding

Explanation:-

Answer: Option D. -> Crushing or grinding
Answer: (d).Crushing or grinding

Question 5. For getting leached product from copper ore it is mandatory to add hydrochloric acid to the ore.

True
False
May be True or False
Can't say

Explanation:-

Answer: Option B. -> False
Answer: (b).False

Question 6. The representation AB is known as

Bound moisture
Unbound moisture
Equilibrium moisture
None of the mentioned

Explanation:-

Answer: Option B. -> Unbound moisture
Answer: (b).Unbound moisture

Question 7. The given solid will gain or remove moisture till.

pA > P
pA< P
pA= p
pA= 0

Explanation:-

Answer: Option C. -> pA= p
Answer: (c).pA= p

Question 8. Find the representation X.

Water
Water vapour
Ice
All of the mentioned

Explanation:-

Answer: Option B. -> Water vapour
Answer: (b).Water vapour

Question 9. Find the equilibrium moisture content.

0.2
0.42
0.5
None of the mentioned

Explanation:-

Answer: Option D. -> None of the mentioned
Answer: (d).None of the mentioned

Question 10. Find the process of drying in the closed vessel given below.

Continuous
Batch
Semi batch
None of the mentioned

Explanation:-

Answer: Option B. -> Batch
Answer: (b).Batch