Livestock Products Technology-DAIRY SCIENCE- question bank-4
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Livestock Products Technology-DAIRY SCIENCE- question bank-4
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1. Cottage cheese is a soft, unripened cheese usually made from Skim milk?
2. Operation flood was started in the year 1970 ?
3. Plastic cream contains 65-85 per cent milk fat ?
4. According to PFA Rules the milk fat content of khoa should not be less than 20
per cent of finished product. ?
5. The average specific gravity of skim milk ranges from 1.035 to 1.037 ?
6. According to the PFA Rules the mixed milk should contain minimum per cent of
milk fat and milk SNF respectively 4.5, 8.5 ?
7. The chairman of NDDB, has become the first Indian to be elected to the board of
the International Dairy Federation (IDF) Dr. (Ms) Amrita Patel ?
8. Daily per capita milk consumption recommended by the Medical Authorities is
280g ?
9. According to the PFA Rules chhana should not contain more than 70 per cent
moisture ?
10. The acidity in mastitic milk is Lower than normal milk ?
11. The starter organisms for yoghurt are Streptococcus thermophilus and
Lactobacillus delbruekii subsp. bulgaricus ?
12. Natural acidity of milk is due to casein,acid phosphates and citrates ?
13. Temperature and time of flash pasteurization 720Cfor 15 second ?
14. Pizza is prepared from mozzarella cheese ?
15. National Dairy Development Board, Anand ,Gujarat was set-up in the year1965 ?
16. Soft ice cream is usually drawn from the freezer at around - 8 to -7°C. The
overrun may be in the range of 30 to 50 per cent. ?
17. Pasteuization refers to the process of heating every particle of milk to at least
63ºCfor 30 min or heating to 72ºC for 15 sec. ?
18. The time-temperature combinations used for producing sterilized milk are 145ºC
and 3 sec. ?
19. The low temperature storage of raw milk prior to processing is likely to increase
Psychrotrophic counts. ?
20. The spores of B. stearothermophilus are known to withstand UHT treatment.?
21. Sterilizing effect refers to the number of decimal reductions that the heat
treatment is able to effect in milk.?
22. For aseptic packaging of UHT milk, Tetra pack, Tetra-Brick etc are used as
packaging materials?
23. The common groups of post-pasteurization contaminants include Coliforms and
psychrotrophs
24. The thermal destruction of bacteria in milk is based on the principle of Protein
denaturation ?
25. Pseudomonas putrefaciens causes surface taints in butter.?
26. The gas producing organisms may enter milk chiefly from soil and manure.?
27. The blue discolouration in milk is caused by the associative action of Ps.
Syncyanea and S. lactis. ?
28. Slime production in milk is mainly caused by Leuconostoc genus of lactic acid
bacteria. ?
29. Ropiness in milk is mainly caused by Alcaligenes viscolactis ?
30. Coliforms cause Early blowing in cheese. ?
31. The two types of materials responsible for ropiness are Gums, and Mucins ?
32. The three types of rancidity in milk are Hydrolytic, oxidative and ketonic ?
33. The fruity aroma of milk produced by Ps. fragi is due to the production of Esters;?
34. Malty flavour produced by S. lactis var. maltigenes in milk is due to the
production of Aldehydes . ?
35. Unclean flavour in milk may be due to microbial production of Dimethyl sulfide?
by Gram-negative psychrotrophic bacteria.
36. Faecal coliforms in dairy products are detected by Eijkman test test. ?
37. The common indicator organisms used for determining faecal contamination in
frozen and thermized foods are Enterococci ?
38. The tentative standards for bacterial count of environment in butter section are
300 cfu/m3 ?
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39. The aflatoxin B1 in dairy animal feed is transformed into aflatoxin M1 and is
secreted into milk. ?
40. The efficiency of dairy sanitizers is determined by Capacity and suspension
tests. ?
41. Food-borne intoxications through dairy products are mainly caused by
Staph.aureus ?
42. Widal test is used for the detection of Salmonella in dairy products. ?
43. E.coli forms typical Dark centered with green metallic sheen colonies on Eosin
Methylene Blue (EMB) agar.?
44. Indian Standards Institution (ISI) has been renamed as Bureau of Indian
Standards ?
45. ICMSF stands of International Commission on Microbiological Specifications
for Foods;?
46. Indole is produced from tryptophan by the action of Tryptophanase enzyme of
micro-organisms during IMViC test.?
47. Milk with titratable acidity more than 0.17 % (LA) gives a positive COB test.?
48. A special pipette called Breed’s pipette is used for performing direct microscopic
count (DMC).?
49. For staining milk smear during direct microscopic count, a special stain, a special
stain called Newman’s stain is used.?
50. The oxidation-reduction potential of resazurin is 0.34 V whereas it is 0.1 V or les
for dihydroresorufin.?
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