,Question 1
What is the molal freezing point depression of a sample with an osmolality of 312 mOsm/kg?
a) −5.580 °C
b) −0.580 °C
c) −0.0580 °C
d) 0.058 °C
Correct Answer: b) −0.580 °C
Rationale:
Freezing point depression is proportional to osmolality. Normal plasma (~290 mOsm/kg) has a
freezing point of about −0.54 °C. A value of 312 mOsm/kg corresponds to a slightly greater
depression, approximately −0.58 °C.
Question 2
Which first-aid measure should be taken first after a needlestick injury?
a) Encourage bleeding
b) Clean the site with alcohol
c) Clean the site with hydrogen peroxide
d) Clean the site with soap and water
Correct Answer: d) Clean the site with soap and water
Rationale:
Immediate washing with soap and water reduces pathogen load and is the recommended first
response. Antiseptics may be used afterward but are not the first step.
Question 3
Ingestion of which substance may produce a false-positive fecal occult blood test?
a) Poultry
b) Horseradish
c) Alcohol
d) Melon
Correct Answer: b) Horseradish
,Rationale:
Horseradish contains peroxidase activity, which can cause false-positive results in guaiac-based
fecal occult blood testing.
Question 4
Which action best describes corrective maintenance?
a) Daily scheduled activities
b) Steps performed at specific intervals
c) Monthly scheduled activities
d) Repair parts when failure occurs
Correct Answer: d) Repair parts when failure occurs
Rationale:
Corrective maintenance is unscheduled repair performed after equipment malfunction or failure.
Question 5
Which condition correlates with the following iron study results?
• Iron: Increased
• TIBC: Decreased
• Ferritin: Increased
• % Saturation: Increased
a) Iron deficiency anemia (IDA)
b) Hemochromatosis
c) Chronic infection
d) Anemia of chronic disease (ACD)
Correct Answer: b) Hemochromatosis
Rationale:
Hemochromatosis is characterized by iron overload, reflected by increased iron, ferritin, and
saturation with decreased TIBC.
Question 6
A newborn requires an immediate transfusion of packed red blood cells. What action should be
taken?
, a) Issue Group O Rh-negative packed RBCs
b) Repeat the DAT on the cord specimen
c) Perform an elution on maternal RBCs
d) Issue Group A Rh-positive packed RBCs
Correct Answer: a) Issue Group O Rh-negative packed RBCs
Rationale:
In emergency neonatal transfusions, Group O Rh-negative RBCs are safest to avoid ABO or Rh
incompatibility.
Question 7
Which social construct is most predictive of future health status?
a) Gender
b) Professional activity
c) Formal education
d) Economic position
Correct Answer: d) Economic position
Rationale:
Socioeconomic status strongly influences access to care, nutrition, housing, and health outcomes,
making it the strongest predictor.
Question 8
Which test may be used to identify a short, pale-staining Gram-negative bacillus from a gray
colony on anaerobic blood agar?
a) 20% bile
b) Lipase
c) SPS disk
d) Reverse CAMP
Correct Answer: a) 20% bile
Rationale:
Bacteroides species are bile resistant and grow in 20% bile, aiding identification.
Question 9
Which RBC morphology correlates with acute blood loss?
What is the molal freezing point depression of a sample with an osmolality of 312 mOsm/kg?
a) −5.580 °C
b) −0.580 °C
c) −0.0580 °C
d) 0.058 °C
Correct Answer: b) −0.580 °C
Rationale:
Freezing point depression is proportional to osmolality. Normal plasma (~290 mOsm/kg) has a
freezing point of about −0.54 °C. A value of 312 mOsm/kg corresponds to a slightly greater
depression, approximately −0.58 °C.
Question 2
Which first-aid measure should be taken first after a needlestick injury?
a) Encourage bleeding
b) Clean the site with alcohol
c) Clean the site with hydrogen peroxide
d) Clean the site with soap and water
Correct Answer: d) Clean the site with soap and water
Rationale:
Immediate washing with soap and water reduces pathogen load and is the recommended first
response. Antiseptics may be used afterward but are not the first step.
Question 3
Ingestion of which substance may produce a false-positive fecal occult blood test?
a) Poultry
b) Horseradish
c) Alcohol
d) Melon
Correct Answer: b) Horseradish
,Rationale:
Horseradish contains peroxidase activity, which can cause false-positive results in guaiac-based
fecal occult blood testing.
Question 4
Which action best describes corrective maintenance?
a) Daily scheduled activities
b) Steps performed at specific intervals
c) Monthly scheduled activities
d) Repair parts when failure occurs
Correct Answer: d) Repair parts when failure occurs
Rationale:
Corrective maintenance is unscheduled repair performed after equipment malfunction or failure.
Question 5
Which condition correlates with the following iron study results?
• Iron: Increased
• TIBC: Decreased
• Ferritin: Increased
• % Saturation: Increased
a) Iron deficiency anemia (IDA)
b) Hemochromatosis
c) Chronic infection
d) Anemia of chronic disease (ACD)
Correct Answer: b) Hemochromatosis
Rationale:
Hemochromatosis is characterized by iron overload, reflected by increased iron, ferritin, and
saturation with decreased TIBC.
Question 6
A newborn requires an immediate transfusion of packed red blood cells. What action should be
taken?
, a) Issue Group O Rh-negative packed RBCs
b) Repeat the DAT on the cord specimen
c) Perform an elution on maternal RBCs
d) Issue Group A Rh-positive packed RBCs
Correct Answer: a) Issue Group O Rh-negative packed RBCs
Rationale:
In emergency neonatal transfusions, Group O Rh-negative RBCs are safest to avoid ABO or Rh
incompatibility.
Question 7
Which social construct is most predictive of future health status?
a) Gender
b) Professional activity
c) Formal education
d) Economic position
Correct Answer: d) Economic position
Rationale:
Socioeconomic status strongly influences access to care, nutrition, housing, and health outcomes,
making it the strongest predictor.
Question 8
Which test may be used to identify a short, pale-staining Gram-negative bacillus from a gray
colony on anaerobic blood agar?
a) 20% bile
b) Lipase
c) SPS disk
d) Reverse CAMP
Correct Answer: a) 20% bile
Rationale:
Bacteroides species are bile resistant and grow in 20% bile, aiding identification.
Question 9
Which RBC morphology correlates with acute blood loss?
