Postharvest Technology MCQs (Set 10) Posted on August 23, 2026Author agropublishers 0 1. Why is oxygen reduced to approximately 1–5% in Modified Atmosphere Packaging (MAP) of fresh-cut lettuce? To completely stop respiration To slow the metabolic rate and respiration of cut tissues To increase ethylene production To promote anaerobic respiration 2. Considering postharvest physiology, which combination of storage-atmosphere conditions can induce physiological injury in fruits and vegetables? Very low O₂ and/or excessively high CO₂ None of these Normal O₂ and low CO₂ High O₂ and normal CO₂ 3. Postharvest diseases are diseases that develop primarily _____________________ After produce has been harvested During seed germination Before flowering During soil preparation 4. The Total Soluble Solids (TSS) / Total Soluble Solids (TA) ratio in postharvest horticulture is primarily used as an indicator of the ___________ Skin thickness Fruit size Balance between sweetness and acidity Respiration rate 5. _____________ cause many of the most important postharvest decays in fruit crops, leading to major losses during storage and transport Nematodes Viruses Fungi Weeds 6. For fresh-cut apple slices, which strategy best reduces enzymatic browning during storage? Storing at room temperature without treatment Using very high storage temperatures Exposing slices to air before refrigeration Dipping slices in an antioxidant solution and storing under refrigeration 7. What is the main advantage of osmotic dehydration before final drying of pineapple pieces? Increases water content and speeds up final drying Primarily changes fruit color Completely sterilizes the fruit Partially removes water while infusing solutes, improving texture and flavor 8. _______________________________ combines spectral information with spatial imaging to test fruit quality without breaking the skin Colorimetry Penetrometry Hyperspectral imaging Refractometry 9. Which instrument is commonly used to measure fruit firmness in postharvest quality assessment? Gas chromatograph Penetrometer Colorimeter Refractometer 10. Total soluble solids (TSS) are commonly expressed as _______________________ Degrees Brix Newtons Kilopascals Milligrams per kilogram Loading … Question 1 of 10
