Exam 2021 Flashcards
Choose the correct answers!
a) The F0 value is a technological characteristic expressing the thermal death time equivalent
at 121.1°C for the applied heat treatment procedure
b) The F0 value is a microbiological characteristic which expresses the thermal death time at
121.1°C
c) According to the 12D principle, the food microbiological safety requirement is F 2.52 minutes
d) According to the 12D principle the food microbiological safety requirement is F
- 0.21 minutes
a) The F0 value is a technological characteristic expressing the thermal death time equivalent
at 121.1°C for the applied heat treatment procedure
c) According to the 12D principle, the food microbiological safety requirement is F 2.52 minutes
Choose the correct answers!
a) The D value is the time needed to a decimal reduction of the live cell count
b) The D value is the temperature increase necessary for a tenfold reduction of the thermal
death time
c) The Z value is the time needed to a decimal reduction of the live cell count
d) The Z value is the temperature increase necessary for a tenfold reduction of the thermal
death time
a) The D value is the time needed to a decimal reduction of the live cell count
d) The Z value is the temperature increase necessary for a tenfold reduction of the thermal
death time
Choose the correct answers!
a) In case of food poisoning, the causative agent produces exotoxin in the food
b) In case of food poisoning, the causative agent produces exotocin in the GI tract
c) In case of toxico-infection, the causative agent produces exotoxin in the food
d) In case of toxico-infection, the causative agent produces exotoxin in the GI tract
a) In case of food poisoning, the causative agent produces exotoxin in the food
d) In case of toxico-infection, the causative agent produces exotoxin in the GI tract
Choose the correct answers!
a) The HACCP plan should be establishment- and product-specific
b) The GHP plan should be establishment- and product-specific
c) The GHP concept focuses on the hazards not properly manageable by HACCP
d) The HACCP concept focuses on the hazards not properly manageable by GHP
a) The HACCP plan should be establishment- and product-specific
d) The HACCP concept focuses on the hazards not properly manageable by GHP
Choose the correct answers!
a) In general, the heat resistance of microorganisms reduces as the water activity decreases
b) In general, the heat resistance of microorganisms increases as the water activity decreases
c) The heat resistance of microbes is the lowest at the pH optimum of their growth
d) The heat resistance of microbes is the highest at the pH optimum of their growth
b) In general, the heat resistance of microorganisms increases as the water activity decreases
d) The heat resistance of microbes is the highest at the pH optimum of their growth
Choose the correct answers!
a) In general, the water activity demand of gram positive bacteria is higher than the gram
negative ones
b) In general, the water activity demand of gram negative bacteria is higher than the gram
positive ones
c) In general, the water activity demand of bacteria is higher than the yeasts
d) In general, the water activity demand of bacteria is lower than the yeasts
b) In general, the water activity demand of gram negative bacteria is higher than the gram
positive ones
c) In general, the water activity demand of bacteria is higher than the yeasts
Choose the correct answers!
a) In food processing plants water of drinking water quality shall be used for hand washing and cleaning, as well
b) In food processing plants water of drinking water of non-polatble quality can be used for
hand washing and cleaning
c) Equipment surfaces coming into direct contact with food shall be easy to clean and
disinfect
d) Equipment surfaces coming into contact with food shall be sterile
a) In food processing plants water of drinking water quality shall be used for hand washing and cleaning, as well
c) Equipment surfaces coming into direct contact with food shall be easy to clean and
disinfect
Choose the correct answers!
a) The redox potential of fresh meat is higher than that of the minced meat
b) The redox potential of fresh meat is lower than that of minced meat
c) In general, the pH optimum of bacteria is lower than that of moulds
d) In general, the pH optimum of bacteria is higher than that of moulds
b) The redox potential of fresh meat is lower than that of minced meat
d) In general, the pH optimum of bacteria is higher than that of moulds
Choose the correct answers
a) The efficacy of iodophores is increased by the elevation of temperature
b) The efficacy of iodophores is decreased by the elevation of temperature
c) The cation-active tensides exhibit pronounced disinfecting properties
d) The anion-active tensides exhibit pronounced disinfecting properties
b) The efficacy of iodophores is decreased by the elevation of temperature
c) The cation-active tensides exhibit pronounced disinfecting properties
Choose the correct answers!
a) Food safety expresses that the food is harmless for human consumption
b) Food hygiene expresses that the food is harmless for human consumption
c) Food safety includes the conditions and measures needed to establish the safety of our
foods
d) Food hygiene includes the conditions and measures needed to establish the safety of our
foods
a) Food safety expresses that the food is harmless for human consumption
d) Food hygiene includes the conditions and measures needed to establish the safety of our foods
Choose the correct answers!
a) In case of drinking water, the test for E.coli as faecal indicator is obligatory
b) In case of drinking water, the test for C. perfringens as faecal indicator is obligatory
c) The efficacy of chlorine-containing disinfection is increased by the elevation of temperature
d) The efficacy of chlorine-containing disinfection is decreased by the elevation of temperature
a) In case of drinking water, the test for E.coli as faecal indicator is obligatory
d) The efficacy of chlorine-containing disinfection is decreased by the elevation of temperature
Choose the correct answers!
a) Food chain of animal foodstuffs does not include the farm and the feed industry
b) Food chain of animal foodstuffs also includes the farm and the feed industry
c) Food safety is based primarily on consumer’s expectations
d) Food quality is based primarily on consumer’s expectation
b) Food chain of animal foodstuffs also includes the farm and the feed industry
d) Food quality is based primarily on consumer’s expectation
Choose the CORRECT answers!
a) The primary responsibility for food safety rests with the food safety authorities
b) The primary responsibility for food safety rests with the food producer
c) The conditions and rules of food hygiene primarily aim at achieving adequate food quality
d) The conditions and rules of food hygiene primarily aim at achieving adequate food safety
a) The primary responsibility for food safety rests with the food safety authorities
d) The conditions and rules of food hygiene primarily aim at achieving adequate food safety
Choose the correct answers!
a) Food hygiene is the basic system of establishing and guaranteeing food safety
b) Food quality is the basic system of establishing and guaranteeing food hygiene
c) Food hygiene requirements and tools also refer to the primary production
d) Food hygiene requirements and tools do not refer to the primary production
a) Food hygiene is the basic system of establishing and guaranteeing food safety
c) Food hygiene requirements and tools also refer to the primary production
Choose the correct answers
a) The infective dose of campylobacters is high, at least 10,000 cells are needed to induce
diseases in humans
b) The infective dose of campylobacters is low, even 100-500 bacterial cells can cause
disease in humans
c) The infective dose of campylobacters is higher than that of salmonellae
d) The infective dose of campylobacters is lower than that of salmonellae
b) The infective dose of campylobacters is low, even 100-500 bacterial cells can cause disease in humans
d) The infective dose of campylobacters is lower than that of salmonellae
Choose the correct answers!
a) The infective dose of salmonellae is low, even 100-500 organisms may induce disease in humans
b) The infective dose of campylobacters is low, even 100-500 organisms may induce disease in humans
c) The infective dose of EHEC strains is lower than that of other E. coli strains
d) The infective dose of EHEC strains is higher than that of other E. coli strains
b) The infective dose of campylobacters is low, even 100-500 organisms may induce disease in humans
c) The infective dose of EHEC strains is lower than that of other E. coli strains
Choose the correct answers!
a) Botulinumtoxin is a neurotoxin that cause a flaccid paralysis of the muscles
b) Botulinumtoxin is an emetic toxin that cause gastrointestinal signs
c) The emtic toxin of Bacillus cereus is a heat sensitive
d) The diarrhoeic toxin of bacillus cereus is heat sensitive
a) Botulinumtoxin is a neurotoxin that cause a flaccid paralysis of the muscles
d) The diarrhoeic toxin of bacillus cereus is heat sensitive
Choose the correct answers!
a) Campylobactgers usually form a biofilm on the surfaces
b) L. monocytogenes usually forms a biofilm on the surfaces
c) The clinical symptoms caused by L. monocytogenes in humans are characterized mostly by
extraintestinal signs
d) The clinical symptoms caused by L. monocytogenes in humans are characterized mostly by
intestinal signs
b) L. monocytogenes usually forms a biofilm on the surfaces
c) The clinical symptoms caused by L. monocytogenes in humans are characterized mostly by
extraintestinal signs
Choose the correct answers!
a) Listeria monocytogenes is psychrophilic bacterium
b) Listeria monocytogenes is a mesophilic bacterium
c) Salmonella enteritidis is a psychrophilic bacterium
d) Salmonella enteritidis is a mesophilic bacterium
a) Listeria monocytogenes is psychrophilic bacterium
d) Salmonella enteritidis is a mesophilic bacterium
Choose the correct answers!
a) Yersinia enterocolitica is a mesophilic bacterium
b) Yersinia enterocolitica is a psychrophilic bacterium
c) Yersinia enterocolitica typically cause extraintestinal signs in humans
d) Yersinia enterocolitica typically cause intestinal signs in humans
b) Yersinia enterocolitica is a psychrophilic bacterium
d) Yersinia enterocolitica typically cause intestinal signs in humans
Choose the correct answers!
a) Verotoxin-producing E.coli may cause haemolytic uraemic syndrome is humans
b) Listeria monocytogenes may cause haemolutic uraemic syndrome is humans
c) Verotoxin-producing E. coli may cause colitis in calves
d) Verotoxin-producing E. coli may cause colitis in piglets
a) Verotoxin-producing E.coli may cause haemolytic uraemic syndrome is humans
c) Verotoxin-producing E. coli may cause colitis in calves
Choose the correct answers!
a) Campylobactgers usually form a biofilm on the surfaces
b) L. monocytogenes usually forms a biofilm on the surfaces
c) The clinical symptoms caused by L. monocytogenes in humans are characterized mostly by extraintestinal signs
d) The clinical symptoms by L. monocytogenes in humans are characterized mostly by
intestinal signs
b) L. monocytogenes usually forms a biofilm on the surfaces
c) The clinical symptoms caused by L. monocytogenes in humans are characterized mostly by extraintestinal signs
Choose the correct answers!
a) Salmonellae are mesophilic organisms
b) Salmonellae are thermophilic organisms
c) Campylobacters are thermophilic bacteria
d) Campylobacters are mesophilic bacteria
a) Salmonellae are mesophilic organisms
c) Campylobacters are thermophilic bacteria
Choose the correct answers
a) The serotypes of salmonella causing typhus in animals are capable of inducing disease in
humans
b) The serotypes of salmonella causing typhus in animals are not capable of inducing disease in humans
c) Salmonella enteritidis is the serotype that causes the most foodborne salmonellosis in
humans
d) Salmonella gallinarum is the serotype that causes the most foodborne salmonellosis in
humans
b) The serotypes of salmonella causing typhus in animals are not capable of inducing disease in humans
c) Salmonella enteritidis is the serotype that causes the most foodborne salmonellosis in
humans