Chapter 12 - Fire-Resistive Construction

Question 1

Fire resistive Construction is considered to be the best because of what two reasons

Answer 1

It doesn’t contribute fuel to a fire and is the most resistant to collapse

Question 2

Concrete after mixed sets but it what

Answer 2

Continues to cure indefinitely

Question 3

What retards the curing of concrete

Answer 3

Low temperatures

Question 4

Concrete is weak in what type of strength

Answer 4

Tensile strength

Question 5

Concrete has what type of shear resistance

Answer 5

Poor

Question 6

Most types of concrete require how many days to obtain full strength

Answer 6

28 days

Question 7

What are the two basic types of concrete construction

Answer 7

Cast and place

Precast

Question 8

Composite construction describes buildings in which

Answer 8

Different load-bearing materials are used in different areas

Question 9

The common cinder block is what type of concrete

Answer 9

Precast

Question 10

What is added to concrete to resist spalling

Answer 10

Polypropylene microfibers

Question 11

What is the chief virtue of concrete

Answer 11

High compressive strength and low cost

Question 12

Concrete beams have zero strength of what

Answer 12

Tensile

Question 13

In a cantilever beam the tension is where

Answer 13

Top of the beam

Question 14

In a continuous beam supported at more than two points tension occurs in the top of the beam where

Answer 14

The area over the tops of the columns

Question 15

In a continuous being supported at more than two points tension occurs in the bottom of the beam where

Answer 15

Between the two columns

Question 16

Vertical reinforcing bars designed to prevent cracking under shear stress

Answer 16

Stirrups

Question 17

Steel has how many times the compressive strength of concrete

Answer 17

15

Question 18

Autoclave aerated concrete is what weight compared to traditional concrete

Answer 18

1/4

Question 19

Many concrete floors are designed as what type of beam

Answer 19

Continuous

Question 20

Concrete floors and what type of buildings may be only load-bearing and may not contribute to the building’s structural stability

Answer 20

Precast pinned concrete

Question 21

Prestressing concrete helps with what type of load

Answer 21

Tensile

Question 22

A major advantage of post tensioning is that floors can be what

Answer 22

Thinner

Question 23

What is the general limit of masonry reinforced buildings

Answer 23

Six stories

Question 24

Interior and exterior walls are equally load-bearing in what type of construction

Answer 24

Reinforced masonry

Question 25

Shores, formwork and lateral bracing

Answer 25

False work

Question 26

What percentage of the cost of the concrete structure is formwork

Answer 26

60%

Question 27

The setting of concrete is dependent on what

Answer 27

Temperature

Question 28

Concrete port at 50° F will develop how much more pressure than at 70° F

Answer 28

1/3

Question 29

The length of time for concrete to cure depends on what two things

Answer 29

The type of cement used and the temperature during the curing period

Question 30

What is a indication that concrete is not yet up to full strength

Answer 30

The presence of reassuring

Question 31

What resistance of post-tension slabs is poor

Answer 31

Shear resistance

Question 32

Precast concrete buildings under construction are unstable until

Answer 32

All connections are completed

Question 33

What might be the most dangerous hazard for type I buildings under construction

Answer 33

Heating most commonly LPG

Question 34

Steal that has been fireproofed is also known as

Answer 34

Protected steel

Question 35

What are the two types of individual fireproofing

Answer 35

In casement and spraying

Question 36

What type of fireproofing does not protect individual members

Answer 36

Membrane

Question 37

The addition of what can significantly affect the fire performance of an assembly

Answer 37

Added insulation that's not part of the specifications

Question 38

What is the most permanent fireproofing

Answer 38

Concrete

Question 39

What is the most common encasement method for columns

Answer 39

Gypsum board

Question 40

What is one of the fire protection advantages of concrete construction

Answer 40

Wax inherent voids

Question 41

If a building is fire resistive it's presumed that the floor will act as what

Answer 41

A barrier to the extension of fire

Question 42

Most imitation concrete panels are made of a

Answer 42

Steel framework with asbestos millboard

Question 43

What two purposes does the concrete and fire resistive Construction serve

Answer 43

Resist compressive stresses Protects The tensile strength of the steel from fire

Question 44

All areas were spoiling has reached the reinforcing steel should be what

Answer 44

Shored

Question 45

Normal strength concrete loses about 25% of its compressive strength at what temperature

Answer 45

575° F

Question 46

Normal strength concrete loses about 75% of its compressive strength at what temperature

Answer 46

11, 007° F

Question 47

When a wall formwork burst it usually goes out where

Answer 47

At the bottom

Question 48

Where will most victims be in a collapse of false work

Answer 48

On top of the false work

Question 49

All cutting into what type of concrete floor is unsafe

Answer 49

Post tensions

Question 50

Concrete structures represent a what compared to other structures

Answer 50

Massive heat sink

Question 51

What are the two basic types of fire resistive construction

Answer 51

Reinforced concrete Structural steel

Question 52

Was serious fires in fire resistive buildings where is the collapse danger lie

Answer 52

Concrete

Question 53

In steel skeleton construction the underside of each floor is what

Answer 53

Light gauge corrugated steel sheets