Respiratory Therapist Interview Questions (2026) and How to Answer
By FindAJobAI team Updated How we wrote this page
Respiratory therapist interviews usually mix clinical scenario questions on ventilator management and blood gas interpretation with behavioral questions about working codes, handling a deteriorating patient and communicating with physicians under pressure. Many employers also ask about specific equipment, oxygen devices and how you'd talk to a frightened patient or family.
Below: 30 questions with what each one really asks and an answer outline, full sample answers to the 10 most asked, red flags to avoid and a 7-day plan.
Answering with STAR
Tell each story in four steps: the situation in a sentence, your task, the actions you took (most of the answer) and the result, with a number if you have one. Aim for about two minutes; the outlines show what to include, the details must be yours.
Behavioural questions (1–10)
How you've handled real situations. Answer each with one true story, in STAR order.
1.Tell me about a time you caught a problem with a patient's breathing before it became an emergency.
What they're really asking: Do you notice small warning signs before they turn into a crisis situation?
Answer outline (STAR)
- SituationA post-surgical patient on the floor had oxygen saturation that kept drifting down between my checks.
- TaskI needed to decide whether this was a monitoring glitch or a real decline before the nurse's next round.
- ActionI reassessed the patient at the bedside, checked the probe placement and listened to his breath sounds.
- ResultThe patient was found to have early atelectasis, got incentive spirometry and closer monitoring.
Full sample answer (fictional example)
On a surgical floor, I had a patient two days post-op whose oxygen saturation kept dipping into the low 90s between my scheduled checks, even though his vitals sheet looked stable. Instead of waiting for the next round, I went back early, checked the probe placement, and listened to his lung sounds, which were noticeably diminished on the right base. I called the surgical resident with the specific numbers and my assessment that this looked like early atelectasis rather than a monitoring issue. His saturation stabilized by morning without needing a rapid response or a transfer, and the resident thanked me for flagging it before it became a bigger problem.
2.Tell me about a code or rapid response you worked.
What they're really asking: Can you stay functional and precise when a patient is actively dying in front of you?
Answer outline (STAR)
- SituationA patient on a medical floor went into respiratory arrest while I was finishing rounds nearby.
- TaskI had to secure the airway and support ventilation while the rest of the code team assembled.
- ActionI bagged the patient with a two-person technique and prepared for intubation.
- ResultThe patient was intubated within minutes, stabilized, and transferred to the ICU.
Full sample answer (fictional example)
I was finishing documentation near a medical floor when a patient went into respiratory arrest. I grabbed the bag-valve mask and began two-person bagging while a nurse called the code. By the time the team arrived, I had suction ready and the right size blade and tube laid out for the physician based on the patient's chart. The physician intubated on the first attempt, and I switched him to the ventilator once we confirmed placement. He was stabilized and transferred to the ICU within twenty minutes.
3.Tell me about a time you disagreed with a physician's order for a patient.
What they're really asking: Will you speak up about patient safety even when it means questioning someone senior to you?
Answer outline (STAR)
- SituationA physician ordered a ventilator setting change that I thought risked over-ventilating a COPD patient.
- TaskI needed to raise the concern without delaying care or appearing to overstep my role.
- ActionI called the physician directly, explained the patient's history and my specific concern using blood gas numbers.
- ResultThe physician agreed to the adjusted setting and the patient's gases improved within the hour.
Full sample answer (fictional example)
A physician ordered a tidal volume increase for a COPD patient who I thought was already being over-ventilated based on his blood gas trend. Rather than just follow the order, I called the physician directly, read him the last two gas results, and explained my concern about breath stacking and rising pressures. I suggested keeping the volume the same and adjusting the respiratory rate instead. He asked a few questions, then agreed to try my suggestion first. Within an hour, the patient's gas improved and his peak pressures came down.
4.Describe a time you had to calm a frightened patient or family member.
What they're really asking: Can you manage someone's fear and keep them cooperative during treatment?
Answer outline (STAR)
- SituationA newly diagnosed COPD patient panicked and kept pulling off his BiPAP mask, saying he couldn't breathe with it on.
- TaskI needed him calm and tolerating the mask so his oxygen levels could recover.
- ActionI knelt to his eye level, slowed my voice and explained what the mask was doing for him in plain terms.
- ResultHe kept the mask on and his saturation climbed back above 90 percent.
Full sample answer (fictional example)
A patient newly started on BiPAP for a COPD flare kept ripping off his mask, telling me he felt like he was suffocating. I turned off the alarm, knelt down to his eye level, and told him plainly that the pressure was doing the breathing work his lungs couldn't do alone right now. I held the mask gently in place myself for the first few minutes and coached him to breathe with the machine instead of against it. His panic eased as his numbers started climbing, and he kept the mask on for the rest of the night.
5.Tell me about training or precepting a new respiratory therapist or student.
What they're really asking: Can you teach someone else your judgment, not just the steps of a task?
Answer outline (STAR)
- SituationA new graduate therapist on orientation was technically sound but hesitant to call physicians with concerns.
- TaskI was asked to precept her for three weeks and get her comfortable working independently.
- ActionI walked through my reasoning out loud on every patient and had her make the call first while I stood beside her.
- ResultBy the end of orientation she was calling physicians confidently on her own.
6.Tell me about supporting a family during a patient's end-of-life care.
What they're really asking: Checks whether you can stay composed and compassionate in the hardest moments of the job.
Answer outline (STAR)
- SituationA terminal patient's family chose to withdraw ventilator support.
- TaskI needed to carry out the terminal wean smoothly while giving the family space to be present.
- ActionI explained each step before doing it and adjusted timing with nursing.
- ResultThe family later wrote to the unit thanking the team by name.
Full sample answer (fictional example)
When a terminal patient's family decided to withdraw ventilator support, I was the therapist doing the extubation. I walked them through each step beforehand, what sounds and changes might happen, so nothing would catch them off guard. I coordinated timing with the nurse managing comfort medications, then removed the tube gently and stepped back so the family had the space to be close to him. I stayed nearby in case anything needed adjusting but let the moment belong to them, not to me.
7.Tell me about a time you worked with a physician who was difficult to reach or dismissive of your concerns.
What they're really asking: Tests persistence and professionalism when a colleague doesn't make collaboration easy.
Answer outline (STAR)
- SituationA physician repeatedly brushed off my pages about a patient's rising oxygen needs, saying to keep watching.
- TaskI needed the patient's plan reassessed before the situation became an emergency.
- ActionI documented the specific numbers each time I called, escalated to the charge nurse and on-call supervisor after the third unanswered concern.
- ResultThe patient was reassessed within the hour and moved to higher-level care.
8.Tell me about a shift where patient volume or acuity spiked suddenly.
What they're really asking: Checks how you function when workload outpaces normal staffing.
Answer outline (STAR)
- SituationA flu surge filled the ER with patients needing breathing treatments and oxygen faster than usual.
- TaskI had to keep every patient safe with twice the normal caseload for my shift.
- ActionI triaged by severity and batched routine treatments where safe.
- ResultNo patient went without needed care, and the extra coverage request became the department's new standard for flu season.
9.Tell me about catching an error in a chart or treatment record.
What they're really asking: Checks attention to detail and willingness to fix mistakes, including your own.
Answer outline (STAR)
- SituationI noticed a previous shift's note listed a ventilator setting that didn't match what was actually running on the machine.
- TaskI needed to correct the record without assuming who was right until I checked.
- ActionI verified the live settings at the bedside and checked the patient's recent gases against both possible settings.
- ResultThe record was fixed before the next shift change.
10.Tell me about learning a new piece of equipment or a new ventilator model quickly.
What they're really asking: Checks how fast you become safely competent with unfamiliar technology.
Answer outline (STAR)
- SituationOur unit switched ventilator brands with only a two-week transition window before the old machines left.
- TaskI needed to be fully competent on the new vents before my first solo night shift with them.
- ActionI went through the in-service training and practiced alarm scenarios on a test unit during downtime.
- ResultI passed competency checkoff a week early and helped two coworkers troubleshoot the new alarms on my first week using it live.
Technical and role-skill questions (11–22)
Can you do the work itself? Think out loud and name the trade-offs.
11.Walk me through how you interpret an arterial blood gas.
What they're really asking: Blood gas interpretation is the core skill tested in almost every respiratory interview.
Answer outline
- Check the pH first to see whether the patient is acidotic or alkalotic.
- Look at the PaCO2 and HCO3 to decide whether the primary problem is respiratory or metabolic.
Full sample answer (fictional example)
When I get a gas back, I check the pH first to see if the patient is acidotic or alkalotic. Then I look at the PaCO2 to see if the respiratory system is driving that, and the HCO3 to see if the metabolic side is involved. For example, a low pH with a high CO2 and a normal HCO3 points to an acute respiratory acidosis with no compensation yet. I always read it alongside the patient in front of me, not just the numbers on the slip.
12.What's the difference between CPAP and BiPAP, and when would you choose each?
What they're really asking: Tests whether you match the right noninvasive support to the specific problem.
Answer outline
- CPAP delivers one constant pressure and mainly helps with oxygenation and keeping airways open, as in sleep apnea or mild pulmonary edema.
- BiPAP delivers a higher pressure on inhale and a lower pressure on exhale.
Full sample answer (fictional example)
CPAP delivers one steady pressure through the whole breath cycle, which mainly helps keep the airway open and improves oxygenation, so I reach for it with sleep apnea or mild fluid in the lungs. BiPAP delivers a higher pressure on inhale and a lower one on exhale, which also gives the patient a push on each breath, so it helps when someone is tiring out or retaining carbon dioxide, like a COPD flare. If a patient is oxygenating fine but working hard to breathe or their CO2 is climbing, I'll choose BiPAP over CPAP every time, because CPAP alone won't give them that extra support on inhalation.
13.A ventilator high-pressure alarm keeps going off. What do you check?
What they're really asking: A common bedside problem that tests a calm, ordered troubleshooting process.
Answer outline
- First I check the patient: are they coughing, biting the tube, or fighting the ventilator.
- Then I check the circuit for water in the tubing, a kink, or secretions needing suction.
14.How would you set up a ventilator for a patient with ARDS?
What they're really asking: Checks whether you know lung-protective ventilation, not just how to turn a vent on.
Answer outline
- I'd use a low tidal volume around 6 milliliters per kilogram of ideal body weight to avoid stretching injured lung tissue.
- I'd keep plateau pressure under 30 and adjust PEEP to keep the lungs open without overdistending them.
Full sample answer (fictional example)
For an ARDS patient, I start with a low tidal volume, around 6 milliliters per kilogram of ideal body weight, to avoid stretching already injured lung tissue. I keep an eye on plateau pressure and try to stay under 30, adjusting PEEP to recruit the lungs without overdistending the healthier parts. I'll let the CO2 run a bit higher than normal, since permissive hypercapnia is safer than pushing more volume or pressure to chase a perfect number. The goal is protecting the lung over the course of days, not just hitting one good blood gas.
15.What oxygen delivery device would you choose for a patient who needs 50 percent FiO2?
What they're really asking: Checks practical knowledge of device limits, not just memorized percentages.
Answer outline
- A nasal cannula tops out around 40 to 44 percent and depends heavily on the patient's breathing pattern.
- A Venturi mask gives a precise, fixed FiO2 and is a reliable way to deliver 50 percent accurately.
16.How do you assess whether a patient is ready to be extubated?
What they're really asking: Tests judgment on one of the highest-stakes decisions in the role.
Answer outline
- I'd check that the underlying reason for intubation has improved and the patient is awake enough to protect their airway.
- I'd run a spontaneous breathing trial and look at the rapid shallow breathing index along with vital sign stability.
Full sample answer (fictional example)
Before I'd recommend extubation, I check that whatever caused the intubation has actually improved, and that the patient is awake enough to protect their own airway. I run a spontaneous breathing trial, usually on minimal support, and track their rapid shallow breathing index along with their heart rate, blood pressure, and how hard they're working to breathe. If all of that looks good, I bring the numbers and my assessment to the physician, since it's their call, but I want to walk in with a clear recommendation rather than just raw data.
17.Walk me through how you'd perform a pulmonary function test.
What they're really asking: Checks whether you can get a reliable result from a test that depends on patient effort.
Answer outline
- I'd explain the maneuver clearly and demonstrate it myself so the patient knows what a full effort looks like.
- I'd coach the patient through each breath, watching the flow-volume loop in real time for a good seal and full effort.
18.How do you tell the difference between obstructive and restrictive lung disease on a pulmonary function test?
What they're really asking: Tests whether you can read PFT patterns, not just recite definitions.
Answer outline
- Obstructive disease, like COPD or asthma, shows a reduced FEV1/FVC ratio because air comes out slowly.
- Restrictive disease, like pulmonary fibrosis, shows a reduced total lung capacity with a normal or high FEV1/FVC ratio.
19.How would you calculate and interpret the A-a gradient?
What they're really asking: A classic exam-style question that checks deeper gas exchange understanding.
Answer outline
- I'd calculate the alveolar oxygen using the alveolar gas equation, then subtract the patient's arterial oxygen from it.
- A normal gradient that widens with age suggests the lungs themselves are the problem, such as a shunt or diffusion issue.
20.Explain PEEP and what auto-PEEP is.
What they're really asking: Checks understanding of a setting that's easy to misuse without catching the risks.
Answer outline
- PEEP keeps a small amount of pressure in the lungs at the end of exhalation to keep alveoli from collapsing.
- Auto-PEEP happens when a patient can't fully exhale before the next breath starts, trapping extra pressure the ventilator doesn't show.
21.How do you manage a patient on high-flow nasal cannula?
What they're really asking: Checks familiarity with a device used increasingly instead of early intubation.
Answer outline
- I'd set flow and FiO2 based on the patient's work of breathing and oxygen saturation, then reassess frequently.
- I'd watch for signs it isn't enough, such as rising respiratory rate, accessory muscle use or a falling saturation despite high settings.
22.A tracheostomy patient's trach appears blocked. What do you do?
What they're really asking: Tests a fast, correct response to an airway emergency with a different anatomy than usual.
Answer outline
- I'd try to pass a suction catheter first, since a mucus plug is the most common cause.
- If suctioning doesn't clear it and the patient is distressed, I'd remove the inner cannula.
Situational questions (23–30)
Scenarios that test judgement: say what you'd do first, and why.
23.A patient's family refuses the BiPAP you believe he needs. How do you handle it?
What they're really asking: Tests whether you respect patient autonomy while still advocating clearly for safety.
Answer outline
- I'd explain in plain language what the mask does and what happens without it, without pressuring them.
- I'd listen to their concerns, since fear or a past bad experience often drives the refusal.
Full sample answer (fictional example)
A patient's wife didn't want him on BiPAP because she'd seen a relative struggle with a mask years ago. I explained in plain terms what the mask does, that it helps him breathe instead of taking over for him, and what we were watching for if we didn't use it. I listened to her concerns instead of just pushing past them, and showed her how the mask would fit before we put it on him. She agreed to a trial, and seeing his color and breathing improve within the hour was what actually changed her mind.
24.You're the only therapist covering the ICU and the ER, and both call you at once. What do you do?
What they're really asking: Checks how you triage limited time across competing emergencies.
Answer outline
- I'd ask each unit for a quick severity read, such as oxygen saturation and whether the patient is talking.
- I'd go to whichever patient sounds more unstable first and ask the other unit to start basic support in the meantime.
25.You notice a coworker skipping a step in the intubation checklist. What do you do?
What they're really asking: Tests whether you'll address a safety shortcut from a peer directly.
Answer outline
- I'd say something in the moment if it affects the current patient.
- I'd raise it with the coworker privately afterward rather than calling them out in front of others.
26.The ventilator you need for an emergency is already in use elsewhere. What do you do?
What they're really asking: Checks resourcefulness under equipment pressure in a real emergency.
Answer outline
- I'd manually bag the patient with a bag-valve mask while arranging for equipment.
- I'd call biomedical engineering or the equipment pool for a backup unit immediately.
27.A physician asks you to do something outside your scope of practice. How do you respond?
What they're really asking: Checks whether you know your legal and professional limits under pressure.
Answer outline
- I'd say clearly and respectfully that the request falls outside what I'm licensed to do.
- I'd offer what I can do instead, such as calling the right person who can perform it.
28.You suspect a patient is exaggerating breathing symptoms to get a stronger treatment. How do you handle it?
What they're really asking: Tests whether you treat based on objective findings rather than assumptions.
Answer outline
- I'd still assess objectively with vitals, breath sounds and oxygen saturation rather than acting on suspicion alone.
- If the objective findings don't support the severity described, I'd treat conservatively and document exactly what I found.
29.Your unit runs short of ventilators during a sudden surge in critical patients. What do you do?
What they're really asking: Checks crisis judgment when standard resources run out.
Answer outline
- I'd notify the supervisor and incident command immediately, since this needs a facility-level response, not an individual one.
- I'd prioritize ventilators by who needs full ventilatory support versus who could be managed on noninvasive support instead.
30.A patient's oxygen saturation reads normal, but they say they can't breathe. What do you do?
What they're really asking: Checks whether you trust the whole patient, not just one monitor number.
Answer outline
- I'd still do a full assessment, since a normal saturation doesn't rule out early distress, anxiety, or a rising CO2 level.
- I'd check their respiratory rate, work of breathing and, if indicated, get a blood gas to see the fuller picture.
Red flags to avoid in your answers
Each one is quick to fix before the day.
Reciting ventilator settings without tying them to the patient in front of you.
Describe how you'd adjust settings based on the patient's disease and trend, not a fixed number.
Sounding unsure about when to escalate to a physician.
Give a clear example of calling a physician promptly, with the specific findings that triggered it.
Treating family communication as someone else's job.
Bring a story where you explained a treatment or calmed a scared patient yourself.
Being vague about scope of practice boundaries.
State plainly what you will and won't do without a physician order, and why.
How to prepare for a respiratory therapist interview in 7 days
An hour or two a day is enough; the order matters more than the length.
Day 1: Blood gas drills
Work through twenty practice ABGs until you can classify pH, CO2 and HCO3 patterns without hesitating.
Day 2: Ventilator modes review
Write out the differences between volume control, pressure control and the noninvasive modes.
Day 3: Code and escalation stories
Draft and rehearse your code story and your physician-disagreement story using specific numbers and outcomes.
Day 4: Alarm troubleshooting
List the top five ventilator alarms you've handled and practice explaining your first three steps for each out loud.
Day 5: Equipment and unit research
Find out which ventilator brand, NIV devices and monitoring system the unit uses.
Day 6: Family update rehearsal
Rehearse explaining BiPAP, oxygen devices and a ventilator in plain language a scared family could follow.
Day 7: Scenario walkthroughs
Run through a few clinical scenarios end to end, from assessment to what you'd tell the physician.
Questions to ask the interviewer
Pick two or three; the answers tell you whether you want the job.
- What ventilators and monitoring equipment does the unit use, and how often is it upgraded?
- What's the therapist-to-patient ratio on a typical shift, and how does it change on nights or weekends?
- How are respiratory therapists involved in rounds and care planning with physicians?
- What does orientation and ongoing competency training look like here?
- What's the escalation process when a therapist disagrees with an order?
Preparation tips
- Review ABG interpretation and acid-base compensation rules until you can do them without hesitating.
- Rehearse a code story and a disagreement-with-a-physician story out loud before the interview.
- Brush up on ventilator modes and alarm troubleshooting, since most interviews include a scenario question.
Prepare the general questions too: tell me about yourself, why do you want to work here? and why are you leaving? Afterwards, send a thank-you email; when the offer comes, negotiate the salary.
How we wrote this page
The FindAJobAI team wrote the questions, outlines and sample answers for respiratory therapist interviews. The people, employers and numbers in the samples are invented: copy the structure, and use details from your own work.
Once we track enough live respiratory therapist job ads, this page also shows the skills they ask for most, counted the same way as our in-demand skills report.
Last reviewed on November 1, 2026.