NFSI NFSI Mechanical Aptitude and Spatial Reasoning 2

Question 1

Two firefighters carry a 180-pound victim on a stretcher. Firefighter A is at the head end and Firefighter B is at the foot end. The victim is centered on the stretcher. Each firefighter carries approximately:

Accepted Answer

90 pounds

Answer

With the load centered, each firefighter bears half the weight, which is 180 ÷ 2 = 90 pounds.

Question 2

A firefighter looks at a mirror image of a map. In the mirror, the exit marked on the east side of the building appears to be on which side?

Accepted Answer

West

Answer

A mirror reverses left and right (east and west), so what appears east in reality appears west in the mirror.

Question 3

A water tank is filled through a 2-inch pipe at 60 gallons per minute and drained through a 1-inch pipe at 30 gallons per minute. The net fill rate of the tank is:

Accepted Answer

30 gpm

Answer

Net fill rate = inflow minus outflow = 60 - 30 = 30 gallons per minute.

Question 4

Which tool would a firefighter most likely use to cut through a padlock shackle during forcible entry?

Accepted Answer

Bolt cutters

Answer

Bolt cutters are specifically designed to cut through metal shackles and chains with high mechanical advantage.

Question 5

A firefighter descending a ladder faces the building. Their left hand grips the left rail. If the firefighter rotates 180 degrees to face away from the building, the left hand now grips the:

Accepted Answer

Right rail

Answer

Rotating 180 degrees swaps left and right orientation relative to the ladder, so the original left rail is now gripped by the right hand, and vice versa.

NFSI - National Firefighter Selection Inventory Practice Test

NFSI - National Firefighter Selection Inventory Practice Test

NFSI NFSI Mechanical Aptitude and Spatial Reasoning 2