firefighter 1 practice test QUESTIONS
AND VERIFED CORRECT ANSWER
GRADED A+ LATEST 2026-2027 100%
GUARANTEED PASS
Before transmitting any information over the fire department radio, a firefighter should:
A. press the key two or three times to signal the intent to transmit.
B. key the microphone and then clear his/her throat to be sure his/her voice will be clear.
C. turn up the volume control if his/her voice is naturally soft.
D. listen to be sure the channel is not being used. - CORRECT ANSWER-D
When using positive pressure SCBA, a poor seal between the face piece and the fire fighter's
face is:
A. not dangerous, because the positive pressure will keep toxic gases out of the face piece.
B. dangerous, because it is depleting the air supply more quickly.
C. not possible, because the positive pressure will seal the face piece to the face.
D. the main cause of deaths on the fireground. - CORRECT ANSWER-B
The bypass valve on a self-contained breathing apparatus is used:
A. during hazardous materials incidents.
B. in emergency situations involving a malfunctioning regulator.
C. to clear the mask of unwanted condensation.
,D. to cool the face piece when high heat is encountered. - CORRECT ANSWER-B
The first noticeable signs of oxygen deficiency are:
A. profuse sweating and ringing in the cars.
B. dizziness, impaired vision, and giddiness.
C. increased respiratory rate and impaired muscular coordination.
D. headache and rapid fatigue. - CORRECT ANSWER-C
Four hazardous atmospheres that fire fighters are likely to encounter at a fire are:
A. super-heated air, toxic gases, oxygen deficiency, and smoke.
B. toxic gases, hyperventilation, oxygen deficiency, and heat.
C. heat, light, smoke, and chemical chain reaction.
D. carbon monoxide, ammonia, water, and hydrogen sulfide. - CORRECT ANSWER-A
Trapped fire fighters awaiting rescue will use less air if they:
A. partially close the cylinder valve.
B. open the bypass valve.
C. struggle to get free.
D. control their breathing. - CORRECT ANSWER-D
The primary function of the bypass valve on SCBA is:
A. to enable the wearer to breathe more oxygen.
B. for use if the regulator fails.
C. to help control excessive heat in the face piece.
D. to facilitate removal of condensation from the lens of the face piece. - CORRECT ANSWER-B
,The proper position of the bypass valve on positive-pressure SCBA under normal conditions is:
A. fully open.
B. cracked open.
C. fully dosed.
D. open three full turns. - CORRECT ANSWER-C
Hypoxia is:
A. low blood sugar.
B. low blood pressure.
C. a deficiency of oxygen.
D. a lowering of the body's core temperature. - CORRECT ANSWER-C
Inhaled toxic gases can directly cause:
A. disease of the lung tissue.
B. muscle cramps in the lower extremities.
C. blurred vision, leading to blindness.
D. amnesia. - CORRECT ANSWER-A
Which of the following statements regarding the two SCBA types in fire service use is incorrect?
A. In an open-circuit SCBA, exhaled air is vented to the outside atmosphere.
B. In a closed-circuit SCBA, exhaled air stays in the system for filtering, cleaning, and circulation.
C. The closed-circuit type is commonly used for structural firefighting.
D. SCBAs for fire service use are designed and built in accordance with NIOSHand NFPA
standards. - CORRECT ANSWER-C
What is the first step a fire fighter should perform before donning the SCBA?
, A. Check the air supply of the SCBA unit.
B. Check the PASS device.
C. Test the low air alarm.
D. Loosen all straps on the harness. - CORRECT ANSWER-A
The purpose of a pass device is to:
A. sound an alarm if certain fire or asphyxiate gases are detected.
B. warn fire fighters when their air supply is low.
C. sound an alarm if a fire fighter is motionless for a set period of time.
D. keep track of elapsed time in deteriorating conditions. - CORRECT ANSWER-C
Oxygen deficient atmospheres are those having less than _____ percent oxygen in the air.
A.21
B. 20.5
C.20
D. 19.5 - CORRECT ANSWER-D
At the beginning of the shift, the fire fighter should make sure their SCBA is at least _____
percent full.
A.75
B. 80
C.85
D.90 - CORRECT ANSWER-D
There are two methods that can be used to don SCBA that is stored in a case:
A. over-the-head and coat method.
AND VERIFED CORRECT ANSWER
GRADED A+ LATEST 2026-2027 100%
GUARANTEED PASS
Before transmitting any information over the fire department radio, a firefighter should:
A. press the key two or three times to signal the intent to transmit.
B. key the microphone and then clear his/her throat to be sure his/her voice will be clear.
C. turn up the volume control if his/her voice is naturally soft.
D. listen to be sure the channel is not being used. - CORRECT ANSWER-D
When using positive pressure SCBA, a poor seal between the face piece and the fire fighter's
face is:
A. not dangerous, because the positive pressure will keep toxic gases out of the face piece.
B. dangerous, because it is depleting the air supply more quickly.
C. not possible, because the positive pressure will seal the face piece to the face.
D. the main cause of deaths on the fireground. - CORRECT ANSWER-B
The bypass valve on a self-contained breathing apparatus is used:
A. during hazardous materials incidents.
B. in emergency situations involving a malfunctioning regulator.
C. to clear the mask of unwanted condensation.
,D. to cool the face piece when high heat is encountered. - CORRECT ANSWER-B
The first noticeable signs of oxygen deficiency are:
A. profuse sweating and ringing in the cars.
B. dizziness, impaired vision, and giddiness.
C. increased respiratory rate and impaired muscular coordination.
D. headache and rapid fatigue. - CORRECT ANSWER-C
Four hazardous atmospheres that fire fighters are likely to encounter at a fire are:
A. super-heated air, toxic gases, oxygen deficiency, and smoke.
B. toxic gases, hyperventilation, oxygen deficiency, and heat.
C. heat, light, smoke, and chemical chain reaction.
D. carbon monoxide, ammonia, water, and hydrogen sulfide. - CORRECT ANSWER-A
Trapped fire fighters awaiting rescue will use less air if they:
A. partially close the cylinder valve.
B. open the bypass valve.
C. struggle to get free.
D. control their breathing. - CORRECT ANSWER-D
The primary function of the bypass valve on SCBA is:
A. to enable the wearer to breathe more oxygen.
B. for use if the regulator fails.
C. to help control excessive heat in the face piece.
D. to facilitate removal of condensation from the lens of the face piece. - CORRECT ANSWER-B
,The proper position of the bypass valve on positive-pressure SCBA under normal conditions is:
A. fully open.
B. cracked open.
C. fully dosed.
D. open three full turns. - CORRECT ANSWER-C
Hypoxia is:
A. low blood sugar.
B. low blood pressure.
C. a deficiency of oxygen.
D. a lowering of the body's core temperature. - CORRECT ANSWER-C
Inhaled toxic gases can directly cause:
A. disease of the lung tissue.
B. muscle cramps in the lower extremities.
C. blurred vision, leading to blindness.
D. amnesia. - CORRECT ANSWER-A
Which of the following statements regarding the two SCBA types in fire service use is incorrect?
A. In an open-circuit SCBA, exhaled air is vented to the outside atmosphere.
B. In a closed-circuit SCBA, exhaled air stays in the system for filtering, cleaning, and circulation.
C. The closed-circuit type is commonly used for structural firefighting.
D. SCBAs for fire service use are designed and built in accordance with NIOSHand NFPA
standards. - CORRECT ANSWER-C
What is the first step a fire fighter should perform before donning the SCBA?
, A. Check the air supply of the SCBA unit.
B. Check the PASS device.
C. Test the low air alarm.
D. Loosen all straps on the harness. - CORRECT ANSWER-A
The purpose of a pass device is to:
A. sound an alarm if certain fire or asphyxiate gases are detected.
B. warn fire fighters when their air supply is low.
C. sound an alarm if a fire fighter is motionless for a set period of time.
D. keep track of elapsed time in deteriorating conditions. - CORRECT ANSWER-C
Oxygen deficient atmospheres are those having less than _____ percent oxygen in the air.
A.21
B. 20.5
C.20
D. 19.5 - CORRECT ANSWER-D
At the beginning of the shift, the fire fighter should make sure their SCBA is at least _____
percent full.
A.75
B. 80
C.85
D.90 - CORRECT ANSWER-D
There are two methods that can be used to don SCBA that is stored in a case:
A. over-the-head and coat method.
