Postharvest Technology MCQs (Set 12) Posted on August 24, 2026Author agropublishers 0 1. In fresh-cut fruit processing, why is cut-surface integrity important for shelf life? Prevents all moisture loss Reduces tissue damage, browning, respiration, and microbial growth Affects appearance Prevents all physiological changes 2. RGB machine vision is most suitable for rapid, non-destructive assessment of ____________ Internal sugar concentration Ethylene biosynthesis genes Size, shape, external color, and visible defects Total acidity 3. The most important bacterial genera responsible for soft rot in stored vegetables are __________ and _____________ Bacillus and Rhizobium Azotobacter and Bradyrhizobium Pectobacterium and Dickeya Xanthomonas and Agrobacterium 4. A high respiration rate in harvested horticultural produce generally results in ________________________ Reduced metabolic activity Longer shelf life Improved firmness Accelerated senescence and reduced shelf life 5. Black mold of onion and garlic is commonly caused by _______________ Aspergillus niger Pectobacterium carotovorum Monilinia fructicola Botrytis cinerea 6. Which host–pathogen interaction best illustrates a quiescent postharvest infection? Mango–Colletotrichum spp. Potato–Pectobacterium spp. Onion–Aspergillus niger Apple–Penicillium expansum 7. A storage facility maintains high relative humidity to minimize water loss but experiences increasing fungal decay. What is the most likely explanation? High humidity eliminates host resistance Surface moisture favors spore germination and pathogen growth High humidity prevents conidial production High humidity sterilizes wounds 8. Which pre-treatment is most helpful before hot-air drying mango slices to retain color and flavor? Prolonged boiling Direct drying at very high temperature Fermentation overnight Anti-browning treatment with moderate drying temperature 9. When horticultural produce is exposed to an excessive irradiation dose, it may cause __________________ Unlimited storage life Guaranteed improvement in texture Tissue damage, discoloration, and poor ripening Increased photosynthesis 10. __________________________ is the specific fungal pathogen responsible for blue mold decay in citrus fruits Penicillium italicum Penicillium digitatum Alternaria alternata Rhizopus stolonifer Loading … Question 1 of 10