CP-FS – CERTIFIED PROFESSIONAL FOOD SAFETY –
Practice Questions & Exam Review | 2026/2027
Practice Test Exams 3–5 | 160 Original Questions with
✓ Correct Answer & Detailed Rationales
Exam Instructions:
Total Questions: 160
SECTION 1: FOOD MICROBIOLOGY & FOODBORNE ILLNESS (Questions 1-25)
1. Which pathogen is most commonly associated with undercooked ground
beef and can cause hemolytic uremic syndrome (HUS)?
A) Salmonella Typhi
B) Listeria monocytogenes
C) Escherichia coli O157:H7
D) Campylobacter jejuni
✓ Correct Answer: C) Escherichia coli O157:H7
Rationale: E. coli O157:H7 is a Shiga toxin-producing E. coli (STEC) strongly
associated with undercooked ground beef. It can cause severe bloody diarrhea
and potentially lead to hemolytic uremic syndrome (HUS), particularly in young
children and elderly individuals. Salmonella causes gastroenteritis but not
typically HUS; Listeria causes listeriosis with neurological complications;
Campylobacter causes diarrheal illness but is more commonly linked to poultry.
2. The "Danger Zone" for food temperature, where bacteria multiply most
rapidly, is: A) 0°F to 32°F (-18°C to 0°C)
,B) 32°F to 40°F (0°C to 4°C)
C) 41°F to 135°F (5°C to 57°C)
,D) 140°F to 165°F (60°C to 74°C)
✓ Correct Answer: C) 41°F to 135°F (5°C to 57°C)
Rationale: The FDA Food Code defines the Temperature Danger Zone as 41°F-
135°F (5°C-57°C), where pathogenic bacteria can double in number every 20
minutes. Foods should not remain in this range for more than 4 hours
cumulative time. Option A is freezer temperatures; B is refrigeration range
(safe); D is hot holding/serving temperatures.
3. Which of the following is a spore-forming bacterium that can survive
cooking and germinate when food is improperly cooled?
A) Staphylococcus aureus
B) Clostridium perfringens
C) Norovirus
D) Shigella spp.
✓ Correct Answer: B) Clostridium perfringens
Rationale: C. perfringens forms heat-resistant spores that survive cooking. When
cooked food (especially meats, gravies) is cooled slowly or held at improper
temperatures, spores germinate and multiply rapidly, causing illness.
Staphylococcus produces heat-stable toxins but doesn't form spores; Norovirus
is a virus; Shigella doesn't form spores and is destroyed by proper cooking.
4. A food handler with a sore throat and fever should be excluded from
working with food primarily because they may transmit:
A) Hepatitis A virus
B) Streptococcus pyogenes or other respiratory pathogens
, C) Clostridium botulinum
D) Vibrio vulnificus
✓ Correct Answer: B) Streptococcus pyogenes or other respiratory pathogens
Practice Questions & Exam Review | 2026/2027
Practice Test Exams 3–5 | 160 Original Questions with
✓ Correct Answer & Detailed Rationales
Exam Instructions:
Total Questions: 160
SECTION 1: FOOD MICROBIOLOGY & FOODBORNE ILLNESS (Questions 1-25)
1. Which pathogen is most commonly associated with undercooked ground
beef and can cause hemolytic uremic syndrome (HUS)?
A) Salmonella Typhi
B) Listeria monocytogenes
C) Escherichia coli O157:H7
D) Campylobacter jejuni
✓ Correct Answer: C) Escherichia coli O157:H7
Rationale: E. coli O157:H7 is a Shiga toxin-producing E. coli (STEC) strongly
associated with undercooked ground beef. It can cause severe bloody diarrhea
and potentially lead to hemolytic uremic syndrome (HUS), particularly in young
children and elderly individuals. Salmonella causes gastroenteritis but not
typically HUS; Listeria causes listeriosis with neurological complications;
Campylobacter causes diarrheal illness but is more commonly linked to poultry.
2. The "Danger Zone" for food temperature, where bacteria multiply most
rapidly, is: A) 0°F to 32°F (-18°C to 0°C)
,B) 32°F to 40°F (0°C to 4°C)
C) 41°F to 135°F (5°C to 57°C)
,D) 140°F to 165°F (60°C to 74°C)
✓ Correct Answer: C) 41°F to 135°F (5°C to 57°C)
Rationale: The FDA Food Code defines the Temperature Danger Zone as 41°F-
135°F (5°C-57°C), where pathogenic bacteria can double in number every 20
minutes. Foods should not remain in this range for more than 4 hours
cumulative time. Option A is freezer temperatures; B is refrigeration range
(safe); D is hot holding/serving temperatures.
3. Which of the following is a spore-forming bacterium that can survive
cooking and germinate when food is improperly cooled?
A) Staphylococcus aureus
B) Clostridium perfringens
C) Norovirus
D) Shigella spp.
✓ Correct Answer: B) Clostridium perfringens
Rationale: C. perfringens forms heat-resistant spores that survive cooking. When
cooked food (especially meats, gravies) is cooled slowly or held at improper
temperatures, spores germinate and multiply rapidly, causing illness.
Staphylococcus produces heat-stable toxins but doesn't form spores; Norovirus
is a virus; Shigella doesn't form spores and is destroyed by proper cooking.
4. A food handler with a sore throat and fever should be excluded from
working with food primarily because they may transmit:
A) Hepatitis A virus
B) Streptococcus pyogenes or other respiratory pathogens
, C) Clostridium botulinum
D) Vibrio vulnificus
✓ Correct Answer: B) Streptococcus pyogenes or other respiratory pathogens
