Firefighter Building Construction 3

Question 1

Which of the following is a warning sign of potential structural collapse that should prompt firefighters to withdraw from a building?

Accepted Answer

Bowing, bulging, or leaning of exterior walls

Answer

Bowing or bulging of exterior walls indicates the wall has lost structural integrity and may collapse onto firefighters operating in or around the building.

Question 2

What is a 'pancake collapse'?

Accepted Answer

A collapse where multiple floors fail and stack horizontally on top of one another

Answer

A pancake collapse occurs when floors fail and fall flat, stacking on top of each other like pancakes, typically leaving very little survivable void space for occupants.

Question 3

The 'two-in, two-out' rule established by OSHA 29 CFR 1910.134 and NFPA 1500 requires that:

Accepted Answer

Two firefighters working inside a hazardous atmosphere must have at least two firefighters outside ready and equipped to perform rescue

Answer

The two-in, two-out rule requires that when two or more firefighters operate in an immediately dangerous atmosphere, a minimum of two firefighters remain outside the hazard area, ready and equipped to rescue them.

Question 4

Which type of structural collapse creates survivable triangular void spaces along the walls because a floor or roof sags in the middle?

Accepted Answer

V-shape collapse

Answer

In a V-shape collapse, a floor or roof fails in the middle and droops downward, creating triangular void spaces along both supporting walls where survivors are most likely to be found.

Question 5

Bowstring truss roofs are considered particularly hazardous to firefighters because:

Accepted Answer

The metal connector plates and gusset plates weaken rapidly under heat, potentially causing sudden and total roof collapse

Answer

Bowstring trusses depend on metal connector plates that fail quickly under fire conditions, and when one connection fails the entire roof can collapse suddenly with virtually no warning.

Firefighter Practice Test

Firefighter Practice Test

Firefighter Building Construction 3