Ch 16 Collapse Hazards Of Buikdings Under Construction

Question 1

Two types of concrete spalling are experienced during fires? Pg 217

Answer 1

Explosive spalling, which propels concrete downward with an explosive force and is accompanied by a loud noise and a dropping spalling , which is similar to plaster ceiling collapse.

Question 2

The construction industry uses two different types of framework for high rise structures? Pg 216

Answer 2

Reinforced concrete and structural steel.

Question 3

The laws in some states require that, when high rise buildings under construction exceed 150 feet or 15 stories what is needed? Pg 223

Answer 3

An outside stem and yoke control valve (OSY) must subdivide the vertical pipe riser into sections.

Question 4

How many sides of the building does the EPA require be enclosed when asbestos is present and demolition is being performed? p. 222

Answer 4

All four

Question 5

Which type of strength does the concrete give the structure? p. 216

Answer 5

Compressive

Question 6

What do some states require when a building under construction is over 15 stories in height? p. 223

Answer 6

Outside stem and yoke control valve

Question 7

How many floors at a time can have the asbestos scraped, packaged and taken away? p. 222

Answer 7

One

Question 8

What makes the formwork fire (even without concrete pouring) a dangerous one to operate at? p. 219

Answer 8

Use of very few nails

Question 9

Approximately how many days does it take for concrete to reach its maximum strength? p. 216

Answer 9

27 days

Question 10

What often ignites the nearby wood or plastic sheeting when concrete floors are curing? p. 218

Answer 10

Heaters

Question 11

In which of the following structures are more firefighters killed? p. 215

Answer 11

Buildings under construction

Question 12

How many lengths of folded hose must the firefighter carry to the floor below the fire in a building under demolition? p. 222

Answer 12

Four

Question 13

What will be the major cause of fire extension in a framework fire in a cast-in-place building under construction? p. 220

Answer 13

Burning timbers

Question 14

Which of the following does NOT occur due to the protective measures taken when removing asbestos from a
building? p. 222

Answer 14

Create a cross breeze within the building

Question 15

What is the minimum distance that a shanty must be located from the building under construction? p. 218

Answer 15

30 feet (9 m)

Question 16

Which present the most serious fire and collapse hazard and suffer the greatest number of major fires nationwide? p. 216

Answer 16

Cast-in-place concrete structures

Question 17

Which type of spalling is similar to a plaster ceiling collapse? p. 217

Answer 17

Dropping spalling

Question 18

Which layers of the concrete are failing when spalling occurs? p. 216

Answer 18

Outer

Question 19

What is built once the floors and columns of a cast-in-place reinforced concrete building are in place? p. 219

Answer 19

Walls

Question 20

What is often placed on the rooftops of smaller buildings to protect them from impacts of falling construction
materials? p. 221

Answer 20

Wooden planks

Question 21

What is the number one ignition source found in a workman’s shanty?
p. 218

Answer 21

Portable heating device

Question 22

What will be the major life hazard at night with a building under construction? p. 213

Answer 22

Large fire

Question 23

What is the most important part of the building under construction? p. 224

Answer 23

Standpipe supply Siamese inlet

Question 24

Where is plywood present on a building under construction that can inhibit smoke venting? p. 214

Answer 24

Around the outside

Question 25

What does a serious fire in a concrete floor structure often involve? p. 216

Answer 25

Formwork

Question 26

From which location must the hoseline be laid if the standpipe riser is not fitted with a cap or seal to hold
the water? p. 223

Answer 26

From the street to the fire