Discussion
Assertion (A): Deep bed dryers give a wide spread of final moisture.
Reason (R): Air leaving the lower layers is cooler and more humid than the air entering.
Select the correct answer from the options below.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both statements are true and the reason explains the assertion. Air passing up through the bed gives up sensible heat to evaporate water and takes up that water as vapour, so it reaches the upper layers cooler, more humid and with much of its drying potential spent.
The lower layers therefore dry fast and may be over-dried, while the upper layers dry slowly and are left wet - the wide spread of final moisture. The effect worsens more than proportionally with depth, which is why practical designs limit the bed, reverse the airflow, or recirculate the grain between passes.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development