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Food Hygiene Boom > Test 1.2 > Flashcards

Test 1.2 Flashcards

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1
Q

Which statement is true for salmonella?

A
  • Indol production is -ve.

- H2S production is +ve.

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2
Q

Which statement is false for L. monocytogenes?

A

Rhamnose -ve.

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3
Q

Which statement is false for E.coli?

A

Citrate utilisation test is +ve.

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4
Q

Enterococcus faecalis can grow:

A

On blood agar with 70% bile content.

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5
Q

Which statement is false?

A

The microbial count can be determined by detecting the amt of ATP.

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6
Q

Which statement is true?

A

+ve colonies of E.coli are bluish green on TBX agar.

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7
Q

Which statement is false?

A

Salmonella decomposes lactose.

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8
Q

Which statement is true for Cl. perfringens?

A

Cultured on sulphite cycloserine agar.

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9
Q

Which statement is false?

A

Enterococcus faecalis is catalase +ve.

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10
Q

Which statement is true for Staph aureus?

A

Reduces nitrate to nitrite.

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11
Q

What is the suitability of sampling based on suspicion + annual monitoring plan? Write the letters to the adequate line:

A
  • Sampling based on suspicion:
    > It is used to inspect the cause of foodborne disease.
    > It is used to detect the poisonous source.
  • Sampling based on monitoring plans:
    > It is used to determine the drug residues in the food.
    > It is used to investigate the chemical contaminants of the food.
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12
Q

Classify the different screening methods:

A 
- Microbial growth inhibition test:
> KIS test.
> Brillant black reduction test.
- R- based test:
> Meatsafe test.
> Snap test.
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13
Q

What is the quantity of 1 sample based on the legal regulation in case of the foods below? Pair the sample with the adequate quantity:

A
  • Cow milk: 500ml.
  • Turkey meat, Mammal fat: 500g.
  • Stone fruit: 1kg.
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14
Q

What are the characteristics to the objective inspection program + the selective control?

A
  • Objective inspection program:
    > It is used to survey attributes of food.
    > The results of the investigation are valid for the whole population.
  • Selective control:
    > It is used to screen the non- compliant items occurring rarely.
    > The sample is selected by targeted risk evaluation.
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15
Q

Classify the different screening method:

A 
- Microbial growth inhibition method:
> Delvotest.
> 4 plate method.
- R- base test: 
> Rosa test.
> ß- based test.
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16
Q

What is the quantity of 1 sample based on the legal regulation in case of the food below?

A
  • Milk: 500ml.
  • Mammal meat, sausage: 500g.
  • Pulse: 1 kg.
17
Q

What is ø true for gas chromatography?

A

It has higher resolution capacities than liquid chromatography.

18
Q

What is the mains bottleneck of molecular spectroscopy?

A

Only 1 compound can give a signal in the given wavelength.

19
Q

Which 1 is ø characteristic of indicator organisms?

A

They are obligate pathogens.

20
Q

Which statement is true for P. aeruginosa?

A

Occurs in faeces, soil, H2O + waster H2O.

21
Q

Which statement is false for sulphite reducing Clostridia + Cl. perfringens?

A

Most representative is Cl. botulinum, which is a natural member of faecal microflora.

22
Q

Which statement is false for heterotrophic aerobic bacteria?

A

Determined at 15ºC + 37ºC.

23
Q

Which statement is true for total coliforms?

A

Associated with a more/ less faecal contamination.

24
Q

Which statement is true for the organic acids as preservatives?

A

The effectiveness of the preservatives depends on the conc temp.

25
Q

Which statement is true for the H2O removal?

A

Reducing the H2O activity inhibits the multiplication of microorganisms.

26
Q

Which statement is true for the heat treatment?

A

The most commonly used preservation method in the food industry.

27
Q

The typical spoilage flora of meat products are?

A

Micrococci, Lactobacilli.

28
Q

The typical spoilage flora of bakery products are?

A

Moulds.

29
Q

Which one is characteristic of indicator organisms?

A

Should be informative in all types of H2O.

30
Q

Which statement is false for P. aeruginosa?

A

Can be used as an indicator of faecal contamination.

31
Q

Which statement is true for sulphite reducing Clostria + Cl perfringens?

A

Spores can survive in H2O for a long time + are highly resistant to disinfection.

32
Q

Which statement is true for heterotrophic aerobic bacteria?

A

Long term examination can be used for control of the treatment of H2O.

33
Q

Which statement is false for total coliforms?

A

Direct indicators of faecal contamination/ or have health risk.

34
Q

Which statement is false for the organic acids as preservatives?

A

At low pH value the degree of dissociation is higher.

35
Q

Which statement is false for the H2O removal?

A

The bacteria can grow < 0.7 aw.

36
Q

Which statement is false for the heat treatment?

A

All of the vegetative cells can be eliminated with 60º

cheat treatment.

37
Q

What part of the electromagnetic radiation spectrum can be used for analytical purpose

A

The UV. visible, infrared +floor covered + x- rays parts/

38
Q

The main bottleneck of mass spectrometry?

A

It is suitable only for structure analysis of chemically clean marrials,

Food Hygiene Boom (16 decks)

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