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TNCC EXAM QUESTIONS
Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -16 Questions and Answers
-Format: Multiple-choice / Flashcard
Question 1: Kinetic Energy
Answer:
KE=1/2mv^2 when mass is doubled, energy is doubled when velocity is doubled, energy is quadrupled
Question 2: Changes to the Pregnant Mother
Answer:
cardio- incr. blood V, resting HR increase 10-20, after 20 wks gestation supine hypotension, incr hormonal can increase vasoD respiratory- incr RR, increase O2 requirements incr hematologic- plasma V incr 30%-50%, incr risk of thromboembolism and DIC etc
Question 3: cavitation
Answer:
because of the high energy associated with high-velocity injuries, cavitation produces crushing, tearing, and shearing injuries.Solid organs, such as the liver are more likely to tear or shear under these forces, whereas air-filled organs such as the lungs can tolerate them more due to their elasticity
Question 4: Newton's Second Law
Answer:
Force = mass x acceleration
Question 5: MVA and their three direct impacts
Answer:
first impact- vehicle hits another object second impact- occupant hits the interior of the vehicle third impact- organs hit other internal structures
Question 6: Haddon Matrix
Answer:
A way of conceptualizing injury prevention strategies based on the phase (pre-event, event, and post-event) and whether the strategy is targeted to the host, the agent (what caused the event), the physical environment, and the socioeconomic environment.
Question 7: Newton's First Law
Answer:
a body at rest will stay at rest unless acted on by an outside force
Question 8: Newton's Third Law
Answer:
For every action there is an equal and opposite reaction
Question 9: blast trauma
Answer:
overpressure- this is the sudden change in atmospheric pressure caused by the blast. This can impact a person via crush forces Dynamic Pressure- This includes the impact of explosive fragments and environmental debris that are displaced by the explosion
Question 10: two types of trauma
Answer:
Blunt trauma Penetrating trauma examples of penetrating- gunshot, impalement, stabbing
Question 11: Blast Trauma Five levels of injury
Answer:
primary- most common with those closest to the blast, most injuries associated with air filled organs secondary- include fragment injuries, puncture wounds, lacerations, and impaled objects. generally- these cause the most casualties tertiary- result from the patient being blown into a large object. injuries include pelvic or femur fractures and thoracic injuries quaternary- result from heat, flame, gas, and smoke and cause burn injuries quinary- the dirty bomb- injuries associated with radioactive, biological, or chemical elements that may be present in the explosion
Question 12: Forms of Energy
Answer:
mechanical, thermal, chemical, electrical, radiant mechanical- the direct impact of an object, such as in a car collision or a pot to the head thermal- the transfer of heat energy, such as a burn from a liquid or hot object like a pot chemical- heat energy from active chemical substances, such as household cleaners or acids electrical- energy transferred from light sockets, power cords, or lightning radiant- energy transferred from a blast, sound waves, radioactivity, or the common sunburn
Question 13: kinematics
Answer:
the study of energy transfer as it applies to identifying actual or potential injuries
Question 14: Biomechanics
Answer:
is the general study of forces and their effects
Question 15: Law of Conservation of Energy
Answer:
Energy cannot be created or destroyed
Question 16: Mechanism of Injury (MOI)
Answer:
is how external forces are transferred to the body, resulting in injury
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