FREE NFSI Cognitive Abilities Questions and Answers

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20 workers can build a road in 9 days, working 4 hours a day. How many days would it take 12 workers to build the same road working 6 hours a day?

Correct! Wrong!

Explanation:
Combined hours of work by all workers:
9 x 4 x 20 = 720

12 workers working 6 hours for one day:
12 x 6 = 72

How many days should they work to achieve 720 hours of work?
720 / 72 = 10

Select the word, phrase, or punctuation mark that correctly completes the sentence:

Firefighters show up at the scene of a fire or emergency and ______ on advanced tools and equipment to handle the situation.

Correct! Wrong!

Explanation:
The correct spelling of the word is "rely."
"Relay" is a word of completely different meaning while "relly" and "relye" are non-existing words.

L111 gets 4 miles per gallon. If L111 drives 76 miles how many gallons of diesel will it have used? Round to the nearest whole number.

Correct! Wrong!

Explanation:
To calculate the gallons used, we divide the total miles driven (76 miles) by the miles per gallon (4 miles per gallon), which equals 19 gallons. This is rounded to the nearest whole number.

Flight 945 passed over Paris at 04:45 and later over Amsterdam at 06:15. The distance between Paris and Amsterdam is 450 miles, what was the average speed of the aircraft?

Correct! Wrong!

Explanation:
The following equation is used: Distance = Speed x Time, or rewritten Speed = Distance / Time.

First find the time traveled between Paris and Amsterdam: the time difference between 4:45 and 6:15 is 1 hour and 30 minutes.

To find the average speed we use the equation stated earlier and divide the distance 450 miles by the time 1.5 hour.
450 / 1.5 = 300 mph.

Select the line that contains the misspelled word, grammatical error, or punctuation error.

"The incident commander is the person responsible for all aspects of an emergency response including quickly managing all incident operations and responsibility for all persons envolved."

Correct! Wrong!

Explanation:
The correct answer is D. Envolved is misspelled, it should say "involved."

The last two weeks you and your colleague Brian have followed the same roster. Brian and his wife have recently been divorced. In the beginning, he seemed to be handling it well, but lately, he has been acting differently than he normally does. Lately, Brian has been keeping to himself and not taking care of his hygiene.
It is late night and you are dispatched to a fire in an apartment building; the fire turns out to be a false alarm caused by a resident frying bacon without turning on the exhaust hood. Upon hearing this, Brian gets very aggressive and starts yelling at the resident. You are forced to drag him back to the fire truck. After returning to the station, you decide to talk with Brian about what happened. He says everything is fine and that he simply snapped because he hasn't been sleeping well.
Brian has been chewing a lot of mint gum lately, and while talking to him this closely, you notice a smell on his breath that is something other than mint.

If Brian is having a problem, what was it most likely to be?

Correct! Wrong!

Explanation:
Let's first remove the answer option "Economic problems." Nothing in the text indicates that this is the case.
Now let's run over the key points in the text above and see what answer options fit these points:
Keeping to himself can be a sign of alcohol abuse.
Bad hygiene can be a sign of alcohol abuse as well.
Unprovoked aggressive behavior can be a sign of insomnia, stress, and alcohol abuse.
Hasn't been sleeping well: Sign of insomnia and can be a sign of stress. But we cannot say for sure whether this is the truth, or whether Brian is just using it as an excuse for his actions.
Chewing mint gum to cover another smell: This could be a sign of alcohol abuse; he could be trying to cover up the smell of liquor.
Most of these signs point to alcohol abuse, which is therefore the most likely problem that Brian has.

Select the line that contains the misspelled word, grammatical error, or punctuation error.

"Firefighters enter burning buildings to extinguish fires and rescue individuals. Many firefighters is responsible for providing medical attention."

Correct! Wrong!

Explanation:
The correct answer is line C. It should say "firefighters are" - since it is a plural noun, it should also be the plural form of the verb.

Which of the following sentences is grammatically correct?

Correct! Wrong!

Explanation:
"Good" is an adjective describing nouns and pronouns; "well" is an adverb here, answering how you do a job.

At a small fire department, there are only 6 firefighters. They are all of very different physiques. Michael weighs 180 pounds, Brian weighs 190 pounds, Michael weighs 140 pounds, Lenny weighs 200 pounds, Frank weighs 250 pounds, and Shane weighs 150 pounds.

What is the average weight of the firefighters?

Correct! Wrong!

Explanation:
To find the average weight of the firefighters, first find the sum of their weight and then divide by the number of firefighters:

180 + 190 + 140 + 200 + 250 + 150 = 1,110
1,110 / 6 = 185

The average weight of the firefighters is 185 pounds.

A firefighter pumped 12 gallons of fuel into one tank, 17 gallons into the next tank, and 21 gallons into the last tank.

How many gallons of fuel did the firefighter pump?

Correct! Wrong!

Explanation:
To solve the question you have to add up the three amounts of fuel pumped:

12 + 17 + 21 = 50

A student is ranked 13th from the right and 8th from the left. How many students are there in total?

Correct! Wrong!

Explanation:
Be careful to only count the student in question once. If he is 13th from the right, there are 12 students to his right. If he is 8th from the left, there are 7 students to the left of him.

Total other students 12 + 7 = 19 Total students: 19 + 1 = 20.

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