Free NFSI Cognitive Abilities Questions and Answers

Question 1

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?

Accepted Answer

50

Answer

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

12 + 17 + 21 = 50

Question 2

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?

Accepted Answer

185 pounds

Answer

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.

Question 3

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

Accepted Answer

20

Answer

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.

Question 4

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?

Accepted Answer

10

Answer

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

Question 5

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?

Accepted Answer

300 mph

Answer

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.

NFSI - National Firefighter Selection Inventory Practice Test

NFSI - National Firefighter Selection Inventory Practice Test

Free NFSI Cognitive Abilities Questions and Answers