Batch tray dryers suffers from the disadvantage of______________________?
Correct answer: C. High labour cost & low heat economy
- A. High maintenance cost
- B. Non-uniform & low production rate
- C. High labour cost & low heat economy
- D. All 'a', 'b' & 'c'
Explanation
Batch tray dryers commonly give non-uniform drying and low production rates, while also requiring substantial labour and having poor heat economy. High maintenance cost is not the standard defining disadvantage, so option c is preferred over all of the above.
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