1|Page
USPS EXAM 421 WINDOW CLERK FOR THE UNITED
STATES POSTAL SERVICE TEST EXAM|| ACCURATE
AND FREQUENTLY TESTED QUESTIONS AND 100%
CORRECT ANSWERS WITH RATIONALES|| LATEST
AND COMPLETE UPDATE WITH EXPERT VERIFIED
SOLUTIONS|| SURE PASS!!
A nurse is taking a health history of a newly admitted patient with a diagnosis of
possible fecal impaction. Which question is the priority to ask the patient or
caregiver?
1. Have you eaten more high fiber foods lately
2. Have you taken antibiotics recently
3. Do you have gluten intolerance
4. Have you experienced frequent, small liquid stools recently - ANSWER:
Have you experienced frequent, small liquid stools recently?
Which information is correct regarding physiological factors that affect
oxygenation?
1. Metabolic rate decreases normally in pregnancy, wound healing, and
exercise.
2. The physiological response to chronic hypoxemia is an increase in white
blood cell production.
3. Carbon monoxide (CO) poisoning decreases the oxygen-carrying capacity of
the blood.
4. The oxygen-carrying capacity of the blood increases when there is a decline
in inspired oxygen concentration. - ANSWER: 3. Carbon monoxide (CO)
poisoning decreases the oxygen-carrying capacity of the blood.
Which skills can the nurse delegate to assistive personnel (AP)? (Select all that
apply.)
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1. Initiate oxygen therapy via nasal cannula.
2. Perform nasotracheal suctioning of a patient.
3. Educate the patient about the use of an incentive spirometer.
4. Assist with care of an established tracheostomy tube.
5. Reposition a patient with a chest tube. - ANSWER: 4. Assist with care of
an established trach tube
5. Reposition a patient with a chest tube
The nurse is caring for a patient with pneumonia. On entering the room, the nurse
finds the patient lying in bed, coughing, and unable to clear secretions. What
should the nurse do first?
1. Start oxygen at 2L/min via nasal cannula
2. Elevate the head of the bed to 45 degrees
3. Encourage the patient to use incentive spirometer
4. Notify the health care provider - ANSWER: 2. Elevate the head of the bed
to 45 degrees
Which statement is true regarding respiratory physiology?
1. Ventilation is the process of moving gases into and out of the lungs.
2. The diaphragm is the major expiratory muscle of respiration.
3. Ventilation requires muscular properties irrespective of the elastic properties
of the lungs.
4. The diaphragm is innervated by the phrenic nerve that exits the cranium. -
ANSWER: 1. Ventilation is the process of moving gases into and out of the lungs
Which condition causes bluish discoloration of the skin and mucous membrane?
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1. Hypoxia
2. Dehydration
3. Hyperlipidemia
4. Right sided cardiac failure - ANSWER: 1. Hypoxia
Which condition causes decreased tissue oxygenation because of the decreased
oxygen-carrying capacity of the blood?
1. Obesity
2. Anemia
3. Pregnancy
4. Neuromuscular disease - ANSWER: 2. Anemia
Hyperkalemia - ANSWER: higher than 5
causes: burns, acute kidney failure, excessive potassium supplements
Hyperkalemia s/s - ANSWER: Muscles weakness hypotension
diarrhea
hyperactive bowel sounds flat P wave
Hyperkalemia treatment/interventions - ANSWER:
cardiac monitor monitor I&O
potassium restricting diet
Hypocalcemia - ANSWER: Lower than 8
USPS EXAM 421 WINDOW CLERK FOR THE UNITED
STATES POSTAL SERVICE TEST EXAM|| ACCURATE
AND FREQUENTLY TESTED QUESTIONS AND 100%
CORRECT ANSWERS WITH RATIONALES|| LATEST
AND COMPLETE UPDATE WITH EXPERT VERIFIED
SOLUTIONS|| SURE PASS!!
A nurse is taking a health history of a newly admitted patient with a diagnosis of
possible fecal impaction. Which question is the priority to ask the patient or
caregiver?
1. Have you eaten more high fiber foods lately
2. Have you taken antibiotics recently
3. Do you have gluten intolerance
4. Have you experienced frequent, small liquid stools recently - ANSWER:
Have you experienced frequent, small liquid stools recently?
Which information is correct regarding physiological factors that affect
oxygenation?
1. Metabolic rate decreases normally in pregnancy, wound healing, and
exercise.
2. The physiological response to chronic hypoxemia is an increase in white
blood cell production.
3. Carbon monoxide (CO) poisoning decreases the oxygen-carrying capacity of
the blood.
4. The oxygen-carrying capacity of the blood increases when there is a decline
in inspired oxygen concentration. - ANSWER: 3. Carbon monoxide (CO)
poisoning decreases the oxygen-carrying capacity of the blood.
Which skills can the nurse delegate to assistive personnel (AP)? (Select all that
apply.)
,2|Page
1. Initiate oxygen therapy via nasal cannula.
2. Perform nasotracheal suctioning of a patient.
3. Educate the patient about the use of an incentive spirometer.
4. Assist with care of an established tracheostomy tube.
5. Reposition a patient with a chest tube. - ANSWER: 4. Assist with care of
an established trach tube
5. Reposition a patient with a chest tube
The nurse is caring for a patient with pneumonia. On entering the room, the nurse
finds the patient lying in bed, coughing, and unable to clear secretions. What
should the nurse do first?
1. Start oxygen at 2L/min via nasal cannula
2. Elevate the head of the bed to 45 degrees
3. Encourage the patient to use incentive spirometer
4. Notify the health care provider - ANSWER: 2. Elevate the head of the bed
to 45 degrees
Which statement is true regarding respiratory physiology?
1. Ventilation is the process of moving gases into and out of the lungs.
2. The diaphragm is the major expiratory muscle of respiration.
3. Ventilation requires muscular properties irrespective of the elastic properties
of the lungs.
4. The diaphragm is innervated by the phrenic nerve that exits the cranium. -
ANSWER: 1. Ventilation is the process of moving gases into and out of the lungs
Which condition causes bluish discoloration of the skin and mucous membrane?
, 3|Page
1. Hypoxia
2. Dehydration
3. Hyperlipidemia
4. Right sided cardiac failure - ANSWER: 1. Hypoxia
Which condition causes decreased tissue oxygenation because of the decreased
oxygen-carrying capacity of the blood?
1. Obesity
2. Anemia
3. Pregnancy
4. Neuromuscular disease - ANSWER: 2. Anemia
Hyperkalemia - ANSWER: higher than 5
causes: burns, acute kidney failure, excessive potassium supplements
Hyperkalemia s/s - ANSWER: Muscles weakness hypotension
diarrhea
hyperactive bowel sounds flat P wave
Hyperkalemia treatment/interventions - ANSWER:
cardiac monitor monitor I&O
potassium restricting diet
Hypocalcemia - ANSWER: Lower than 8
