Free NREMT EMT Practice Exam with Questions & Answers | Set: 3

The EMS system is activated when an emergency is recognized by a bystander, patient, or first responder. NREMT describes EMS activation as a sequence that begins with recognizing an emergency and then accessing the system.

Option D (Recognition) is correct because without recognition, no call for help occurs.

Option C (Notification) follows recognition.

Option B (Dispatch) occurs after notification.

Option A (Response) is the physical movement of EMS resources after dispatch.

NREMT emphasizes public education on recognizing emergencies as a key component of effective EMS systems.

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The correct answer is B. Myocardial infarction.

Key findings in this scenario:

Elderly patient (80 years old)

History of diabetes

Sudden onset (1 hour)

Nausea, vomiting, fatigue, weakness

Normal blood glucose (130 mg/dL)

No focal neurological deficits (equal grips, symmetrical face)

Why Myocardial Infarction is correct:

Elderly and diabetic patients often present with atypical symptoms of myocardial infarction, such as:

Generalized weakness

Nausea and vomiting

Fatigue

Absence of chest pain (“silent MI”)

NREMT-aligned references state:

“Elderly and diabetic patients may present with atypical signs of myocardial infarction.”

“Symptoms may include weakness, nausea, vomiting, and fatigue without chest pain.”

Why the other options are incorrect:

A. Cerebral ischemia (stroke)→ Typically presents with neurological deficits (facial droop, unequal grip), which are absent

C. Dehydration→ Usually more gradual onset, not sudden within 1 hour

D. Influenza→ Typically includes fever, body aches, respiratory symptoms, not isolated acute onset

Exact Extracts (NREMT-aligned EMT educational references):

“Atypical presentations of MI are common in elderly and diabetic patients.”

“Symptoms may include nausea, vomiting, fatigue, and weakness.”

“Do not rely solely on chest pain to identify MI.”

Clinical Priority Summary:

In elderly diabetic patients, sudden onset of weakness, nausea, and fatigue strongly suggests an atypical myocardial infarction, making B the correct answer.

Comprehensive and Detailed Explanation (Based on NREMT standards):

Electrical injuries commonly disrupt the heart’s electrical conduction system. NREMT teaching emphasizes that cardiac dysrhythmias are the leading cause of unresponsiveness following electrical exposure, even when external burns appear minor.

Option A is correct because electrical current can induce lethal dysrhythmias such as ventricular fibrillation or asystole, resulting in sudden loss of consciousness.

Option B is incorrect because internal bleeding is not a primary consequence of electrical injury.

Option C may occur but does not typically cause immediate unresponsiveness.

Option D is less likely than cardiac involvement and is not the most common cause.

NREMT stresses continuous cardiac monitoring and rapid transport for all electrical injury patients due to the high risk of sudden cardiac arrest.

Comprehensive and Detailed Explanation (Based on NREMT standards):

Nerve agents are highly toxic organophosphate chemicals that inhibit acetylcholinesterase, leading to excess acetylcholine accumulation and life-threatening cholinergic effects. NREMT hazardous materials education highlights recognition of these agents due to their rapid lethality.

Option C (Tabun) and D (Sarin) are correct. Both are internationally recognized nerve agents historically used in chemical warfare and terrorist attacks.

Option A (Naloxone) is an opioid antagonist, not a nerve agent.

Option B (Metoprolol) is a beta-blocker medication.

Option E (Atropine) is not a nerve agent; it is an antidote used to treat nerve agent poisoning.

NREMT emphasizes scene safety, recognition of toxidromes, and early antidote administration for nerve agent exposure.

The correct answer is A. Fluid overload.

Missed dialysis → inability to remove excess fluid

Shortness of breath + crackles → fluid in the lungs (pulmonary edema)

Hypertension (188/90)

Tachycardia (120)

Low-normal SpO₂ (92%)

These findings strongly indicate fluid overload leading to pulmonary edema.

Patients who miss dialysis retain excess fluid

Fluid accumulates in the lungs → crackles and respiratory distress

Hypertension is common due to increased circulating volume

B. Bronchiolitis → Typically seen in infants/children, not adults

C. Pneumonia → May cause crackles, but does not explain missed dialysis + fluid retention + hypertension pattern

D. Ascites → Fluid in the abdomen, not primarily causing lung crackles or acute respiratory distress

“Patients with renal failure who miss dialysis may develop fluid overload.”

“Pulmonary edema presents with crackles and respiratory distress.”

“Hypertension is commonly associated with fluid overload states.”

The correct answer is C. Providing high-flow oxygen via non-rebreather mask.

This patient is showing clear signs of moderate to severe respiratory distress, including:

Tachypnea (respiratory rate of 28)

Accessory muscle use

Cool, clammy skin (indicating increased work of breathing and possible hypoxia)

According to NREMT airway and ventilation guidelines, patients in respiratory distress who are still breathing adequately should receive high-concentration oxygen, typically via a non-rebreather mask at 10–15 L/min.

Why C is correct:

NREMT educational standards emphasize that in patients with adequate breathing but signs of distress, the appropriate intervention is:

“Administer high-flow oxygen to patients with signs of hypoxia or respiratory distress.”

A non-rebreather mask delivers the highest oxygen concentration without assisting ventilations, making it ideal for this scenario.

Why the other options are incorrect:

A. Nasal cannula: Provides low-flow oxygen and is insufficient for moderate to severe respiratory distress.

B. Oropharyngeal airway: Indicated only for unresponsive patients without a gag reflex, which is not the case here.

D. CPAP: Typically indicated for pulmonary edema or COPD exacerbations with signs of respiratory failure; asthma is a relative contraindication in many EMT-level protocols and is not first-line in this presentation.

Exact Extracts:

“Administer oxygen via nonrebreather mask to patients with adequate breathing and signs of respiratory distress.”

“Patients with increased work of breathing and tachypnea require high-concentration oxygen.”

“Oropharyngeal airways are indicated for unresponsive patients without a gag reflex.”

START (Simple Triage and Rapid Treatment) is a triage method taught by the National Registry of Emergency Medical Technicians for use in mass-casualty incidents. START allows rescuers to quickly prioritize patients based on the severity of their conditions using objective criteria that can be assessed in under 60 seconds.

The correct components of the START system are Respirations, Perfusion, and Mental Status (RPM), making Option D correct. EMTs first assess whether the patient is breathing and evaluate respiratory rate. Next, perfusion is assessed by checking radial pulse or capillary refill. Finally, mental status is evaluated by determining whether the patient can follow simple commands.

Option A describes elements of a general patient assessment, not START triage.

Option B refers to the primary assessment sequence, not mass-casualty triage.

Option C lists triage categories rather than assessment components.

NREMT emphasizes START triage as a rapid, standardized approach to manage large numbers of patients efficiently while maximizing survivability.

For suspected or confirmed tuberculosis (TB), the EMT should place a surgical mask on the patient, not a HEPA respirator. Surgical masks are used to contain droplets from the patient and reduce airborne transmission.

The EMT should wear a N95 or HEPA respirator to protect against inhaling airborne particles. Notification to the CDC is not the EMT’s responsibility — that falls to public health officials.

Contraindications to CPAP (Continuous Positive Airway Pressure) include:

Hypotension: CPAP can reduce preload and worsen shock (BP < 90 systolic is a contraindication)

Respiratory rate too low: A rate of 10 is at the low threshold; CPAP requires spontaneous adequate effort

Active vomiting or nausea: CPAP increases aspiration risk

Crackles and hypoxia are indications, not contraindications, for CPAP. Pulse rate does not influence CPAP use directly.

The correct answer is D. Ventricular tachycardia.

When an AED states “shock advised,” it means the device has detected a shockable rhythm, which includes:

Ventricular fibrillation (VF)

Pulseless ventricular tachycardia (VT)

Among the answer choices, the only shockable rhythm listed is ventricular tachycardia.

Why this is correct:

AEDs are specifically programmed to identify rhythms that benefit from defibrillation. According to NREMT and AHA guidelines:

“Shockable rhythms include ventricular fibrillation and pulseless ventricular tachycardia.”

Why the other options are incorrect:

A. Asystole: This is a non-shockable rhythm (flatline). Treatment is CPR and medications, not defibrillation.

B. Atrial fibrillation: This is typically a perfusing rhythm and is not treated with AED shocks in cardiac arrest.

C. Pulseless electrical activity (PEA): Also a non-shockable rhythm; treated with CPR and addressing underlying causes.

Exact Extracts (NREMT-aligned EMT educational references):

“AEDs will advise a shock only for ventricular fibrillation or pulseless ventricular tachycardia.”

“Asystole and pulseless electrical activity are non-shockable rhythms.”

Clinical Priority Summary:

A “shock advised” message always indicates a shockable rhythm, and the only correct option given is ventricular tachycardia, making D the correct answer.