PRACTICE EXAM FIREFIGHTER 150 Questions with Verified Answers
Which of the following was not suggested for personnel protection with regard to dealing
... [Show More] with the chemical in question?
A. Keep upwind of the chemical.
B. Wear self-contained breathing apparatus.
C. Avoid bodily contact with the chemical.
D. Any chemical that may inadvertently contact the body should be washed off with large amounts of alcohol. - CORRECT ANSWER D. Any chemical that may inadvertently contact the body should be washed off with large amounts of alcohol.
If a container of ethylene oxide has been subjected to fire for a prolonged period of time, what is the recommended distance for safe evacuation? - CORRECT ANSWER 5,000 feet
What dilution of ethylene oxide with water is required to effectively inhibit its flammability? - CORRECT ANSWER 24: 1
Once ethylene oxide becomes contaminated, what kind of chemical process may occur that can generate enough heat and pressure to rupture its containment? - CORRECT ANSWER Polymerization
13. Which of the following choices is not recognized as a symptom stemming from ethylene oxide vapor exposure?
A. Eye irritation
B. Skin irritation or burns
C. Irritation of the respiratory system
D. Loss of muscular function - CORRECT ANSWER C. Irritation of the respiratory system
- CORRECT ANSWER
16. Firefighters often apply a hose stream to the side of a building that is in close proximity to a fire. What is the primary reason for conducting such an operation? - CORRECT ANSWER Radiant heat given off by the neighboring fire may adversely affect the nearest wall. Without the coolant effect of the hose stream, enough heat may be absorbed by an exposed surface to cause ignition and create a separate blaze.
17. Frequently, people use an octopus wall outlet connection to maximize the number of appliances that can be plugged into a single outlet. What would this be considered? - CORRECT ANSWER Unsafe, because the excessive amount of current drawn through the outlet may exceed what it is designed to handle. This may set the stage for wires to overheat or a short circuit to occur, thus causing a fire within the partition.
18. What is the greatest danger aspect for someone using an aluminum ladder to install or realign a rooftop antenna? - CORRECT ANSWER A potential electrical shock hazard is possible when in the vicinity of power lines.
**Any kind of metal ladder poses an electrical hazard if it comes into contact with an energized power line. Aluminum is a superb conductor. Choices A and B are incorrect. Choice D refers to a problem associated with aluminum ladders. However, it is not considered a greater danger than the prospect of electrocution.**
19. In the process of fighting a fire, your superior officer directs you to perform a different part of the operation. If, because of the noise and commotion you do not fully hear or comprehend what was said, what should you do? - CORRECT ANSWER Ask your commanding officer to repeat the instruction.
**Problems that occur at the fire scene that hamper the efficiency of how a fire is handled are normally attributed to poor communication among firefighters. If a direction is not fully comprehended or clearly heard, it is better to have it repeated than to undertake action on your own initiative. Effective teamwork is imperative for any kind of operation to be conducted efficiently. The other choices run counter to this concept.**
21. If someone's clothing were to catch on fire, what would be an appropriate thing to do? - CORRECT ANSWER If it is a loose fitting garment, such as a jacket or coat, you should attempt to strip it off.
Wrap a blanket or something similar around the victim to smother the flames.
Get the victim to drop to the ground and roll slowly.
22. Icy road conditions can be particularly hazardous for driving because - CORRECT ANSWER Friction between the tires and road is minimized.
**Brakes, contrary to popular thought, are not directly responsible for stopping a vehicle. Instead, they retard the motion of the wheels. Consequently, friction develops between the tire and the road which is directly responsible for a vehicle coming to a complete stop.**
23. According to the National Safety Council, each year twenty times more deaths within the United States are caused by fires than by tornadoes, floods, earthquakes, and hurricanes combined. What can we deduce from this statement?
A. Fires are more lethal by comparison.
B. Tornadoes, floods, earthquakes, and hurricanes are taken for granted by most people.
C. People are better able to cope with natural weather phenomena than fire.
D. Statistically there are many more fires than natural weather or geophysical disasters. This, combined with public apathy and a lack of education about fire, is the probable reason for the high fatality rate. - CORRECT ANSWER D. Statistically there are many more fires than natural weather or geophysical disasters. This, combined with public apathy and a lack of education about fire, is the probable reason for the high fatality rate.
**When the destructive capabilities of fire are compared to those of tornadoes, hurricanes, earthquakes, and floods, it is a misconception to think that fire is the worst. In fact, the destructive energy of the other phenomenon discussed is significantly greater. Additionally, fire prevention and education are taken for granted by most people, thus leading to preventable accidents and consequent fatalities.**
24. When mechanical ventilation is required to help purge heat and smoke from a burning building, which of the following should be avoided? - CORRECT ANSWER Placing the exhaust fan, if possible, in the same direction that the prevailing winds are coming from.
**The vented exhaust is being directed against a prevailing wind. This is neither efficient nor desired because the vented gases could be inadvertently recirculated into the building. The best idea is to use wind to your advantage, not have it work against you.**
27. In your judgment, what is the best reason for fire hoses to be removed and reloaded on an apparatus at least once every 30 days?
A. Hose tends to get brittle with little use.
B. Water trapped within a hose after use can stagnate and deteriorate the lining.
C. It reduces the possibility of bends becoming permanently set at certain points in the hoseline.
D. It is just another menial job to keep firefighters constantly busy. - CORRECT ANSWER C. It reduces the possibility of bends becoming permanently set at certain points in the hoseline.
**It is a fact that hose lines left unused for long periods of time deteriorate more quickly than hoses that are frequently used. Unloading hose at least once a month eliminates the problem of bends becoming permanently set in the lining. Once bends happen, hoses can become weak at the bend points and are more prone to leakage or rupture.**
26. What is the most important attribute a good driver has over someone with marginal driving ability? - CORRECT ANSWER A good attitude.
28. Firefighters are responsible for preventing any unnecessary damage from occurring to hoselines at the scene of a fire. Not only are they expensive to replace, but damaged hoses can become ineffective in fighting a fire if they cannot remain charged because of leaks or ruptures. Which of the following hose-care practices is not recommended?
A. Avoid excessive dragging.
B. Don't allow vehicles to run over charged hoses.
C. Avoid laying hose over sharp or rough corners.
D. Use hot air to quickly dry the outside woven jacket of the hose. - CORRECT ANSWER D. Use hot air to quickly dry the outside woven jacket of the hose.
**Most hoses are composed of rubber, natural or synthetic. When rubber is subjected to hot air, it quickly deteriorates or cracks. Moderately warm air should be used to dry hoseline.**
27. In your judgment, what is the best reason for fire hoses to be removed and reloaded on an apparatus at least once every 30 days? - CORRECT ANSWER It reduces the possibility of bends becoming permanently set at certain points in the hoseline.
**It is a fact that hose lines left unused for long periods of time deteriorate more quickly than hoses that are frequently used. Unloading hose at least once a month eliminates the problem of bends becoming permanently set in the lining. Once bends happen, hoses can become weak at the bend points and are more prone to leakage or rupture.**
30. Without considering braided nylon, which of the 1 ½" diameter ropes shown in the chart would support the greatest load?
A. Braided nylon
B. Nylon
C. Polypropylene
D. Manila - CORRECT ANSWER B. Nylon
**Braided nylon would, of course, be the strongest rope shown; however, as it is worded, the question eliminates this as a possibility. Even unbraided 1 ½ inch diameter nylon can support 5,610 pounds. Polypropylene is the second strongest choice given and manila would be considered the weakest.**
- CORRECT ANSWER
- CORRECT ANSWER
33. What is the total resistance (in OHMS) of four resistors, in a series, that are rated OHMS?
A. OHMS
B. 2 OHMS
C. 3 OHMS
D. OHMS - CORRECT ANSWER B. 2 OHMS
- CORRECT ANSWER
35. The formula for converting Celsius temperatures to Fahrenheit is ° F = 9/ 5 (° C ) + 32. What is 25 ° Celsius in Fahrenheit?
A. 102.6 °
B. 77 °
C. 67.3 °
D. 59.4 ° - CORRECT ANSWER B. F ° = (9/ 5)( 25 °) + 32 = 77 °.
**PEMDAS**
- CORRECT ANSWER
37. If someone had an 850-liter underground diesel-fuel tank filled six times during the year, how many kiloliters of fuel were consumed annually?
A. 5.1 kiloliters
B. 51 kiloliters
C. 510 kiloliters
D. 5,100 kiloliters - CORRECT ANSWER
38. How can 1 yards to 16 inches be best expressed in terms of a ratio?
A. 1.33: 16
B. 1.33: 1.5
C. 3: 1
D. 1: 3 - CORRECT ANSWER C. 3: 1
**Since we are dealing with two different units of measure (i.e., yards and inches), it is necessary to convert one to the other. This can be done one of two ways. We know there are 36 inches in a yard, so 16 inches is equal to yard or, in reduced form, yards. Or we can change yards into inches; we simply multiply**
39. The number 49 is 42% of what number?
A. 20.58
B. 79.4
C. 116.67
D. 136.1 - CORRECT ANSWER C. 116.67
set up proportion
49/X = 42/100 [Show Less]