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  3. CEN

Medical Tests CEN Exam (page: 5)
Medical Tests Certified Emergency Nurse
Updated on: 15-Feb-2026

Viewing Page 5 of 26
CEN PDF 195 Questions

You receive an order for 1000 mL of normal saline over 12 hours. The drop factor is 15 drops per 1 mL. You prepare to set the flow rate at how many drops per minute?

  1. 15 drops a minute
  2. 17 drops a minute
  3. 21 drops a minute
  4. 23 drops a minute

Answer(s): C

Explanation:

The drop rate is 21 drops a minute.



You are preparing to give an intravenous dose of 400,000 units of penicillin G benzathine (Bicillin). The 10 mL ampule label reads penicillin G benzathine 300,000 units per mL. You prepare to administer how much of the medication?

  1. 1.3 mL
  2. 1.5 mL
  3. 10 mL
  4. 13 mL

Answer(s): A

Explanation:

The nurse would administer 1.3 mL of penicillin G benzathine.
Desired dose: 400,000 units
Available concentration: 300,000 units (Units) per 1 mL (Volume)



You are preparing to give potassium chloride 30 mEq in 1000 ml of normal saline over 10 hours. The medication label reads 40 mEq per 20 mL. How many milliliters of potassium chloride do you need to administer the correct dose?

  1. 10 mL
  2. 15 mL
  3. 20 mL
  4. 50 mL

Answer(s): B

Explanation:

The nurse would prepare 15 ml of potassium chloride.
Desired dose: 30 mEq
Available concentration: 40 mEq (Units) per 20 mL (Volume)



You enter a patient's room and find the patient not breathing, no pulse, and unresponsive. You have called for help. What is the next step?

  1. Bag mask ventilations
  2. Chest compressions
  3. Oxygen
  4. Open airway

Answer(s): B

Explanation:

New standards in CPR emphasize chest compressions over airway, so the next step after calling for help is to check the pulse and begin chest compressions. Chest compressions should be given immediately (30 for an adult patient), and then followed by opening the airway and beginning respirations. Ventilation is only initiated when the airway is open or patent, as oxygen is not needed until the patient is breathing.



The correct hand placement for chest compressions is the:

  1. Lower third of sternum
  2. Upper half of the sternum
  3. Upper third of the sternum
  4. Lower half of the sternum

Answer(s): D

Explanation:

The correct hand placement for chest compressions is the lower half of the sternum. To determine the proper placement the nurse would want to locate the notch where the rib margin meets the sternum. Place the middle finger on the notch and index finger next to it. Next place the heel of the opposite hand on the lower half of the sternum close to the index finger. Place the first hand on top of the hand on the sternum and begin chest compressions.



What is the proper technique for opening the airway on a trauma patient?

  1. Head tilt-chin lift
  2. Flexed position
  3. Modified head tilt-chin lift
  4. Jaw thrust maneuver

Answer(s): D

Explanation:

To open the airway of any patient that might have a neck injury the nurse would perform a jaw thrust maneuver. All of the other options do not protect the neck from further injury.



The most appropriate place to check the pulse on a 1-month-old infant is:

  1. Brachial
  2. Carotid
  3. Popliteal
  4. Radial

Answer(s): A

Explanation:

Brachial pulse is the appropriate pulse for a 1 month old infant. It is difficult to check the carotid pulse on an infant due to the short, fat neck. Popliteal and radial pulses are also difficult to palpate.



You are encouraging your postoperative patient to cough and take deep breaths. The patient questions why it is so important to do this. Your response would include the understanding that retaining pulmonary secretions can lead to:

  1. Fluid imbalance
  2. Carbon dioxide retention
  3. Pulmonary edema
  4. Pneumonia

Answer(s): D

Explanation:

Coughing and deep breath exercises help prevent pneumonia in the postoperative patient. Pneumonia is inflammation of lung tissue that causes productive cough, dyspnea and crackles. Postoperative complications related to pneumonia can be prevented if the patient is encouraged to cough and breathe deeply.



Viewing Page 5 of 26



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