Chapter 10: Fire Resistive Construction Flashcards
1
Q
1: Concrete is weak in tensile strength but high in\_\_\_\_\_\_\_\_. A: torsion strength B: compressive strength C: potency D: in all of the above
A
B: compressive strength
2
Q
2: As which type of material is concrete classified? A: Cement B: Bolster C: Composite D: Fused
A
C: Composite
3
Q
3: Which type of concrete construction includes plain concrete, reinforced concrete, and post-tensioned concrete? A: Cast-in-place concrete B: Precast concrete C: Lift slab construction D: Flat plates
A
A: Cast-in-place concrete
4
Q
4: Precast concrete includes which of the following? A: Plain concrete B: Reinforced concrete C: Pretensioned concrete D: All of the above
A
D: All of the above
5
Q
5: Which of the following is used to connect the ends of rods placed in columns and transfers the load? A: Sleeves B: Reinforced overlaps C: Welding D: Any of the above
A
D: Any of the above
6
Q
6: Waffle concrete would be considered a\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. A: one-way structural system B: two-way structural system C: three-way structural system D: four-way structural system
A
B: two-way structural system
7
Q
7: Which of the following would be considered the major disadvantage of concrete? A: Its ability to spall B: Its cost C: Its weight D: Its compressive strength
A
C: Its weight
8
Q
8: Which of the following would be an indication that a building is in distress?
A: Deteriorated concrete
B: Spalling that exposes reinforcing rods
C: Cracks in concrete that can admit corrosive moisture to the reinforcing rods
D: Any of the above
A
D: Any of the above
9
Q
9: Which of the following does not react negatively with concrete? A: Chlorine B: Breeze C: Aluminum D: Salt
A
B: Breeze
10
Q
10: In the Los Angeles Central Library fire, there was an estimated 93 pounds of fuel per square foot. This would be equivalent of about how many hours of fire exposure to the standard fire curve? A: 4 B: 6 C: 9 D: 11
A
D: 11
11
Q
MATCHING Buildings in which different load-bearing naterials are used in different areas of the building 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Composite construction
12
Q
MATCHING Temporary shoring, formwork, or lateral bracing to support concrete work in construction 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Falsework
13
Q
MATCHING Variety of materials added to a cement mixer to make concrete 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Aggregate
14
Q
MATCHING Thick concrete pads that transfer loads of piers or columns to the ground 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Footing
15
Q
MATCHING Concrete molded in the location where it is expected to remain 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Cast-in-place concrete
16
Q
MATCHING Shores that are put back into concrete to help carry the load of curing concrete 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Reshoring
17
Q
MATCHING Devices designed to keep the rods up off the surface of the form 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Chairs
18
Q
MATCHING Tiles shaped to fit around steel 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Skewback
19
Q
MATCHING Planks on which formwork shores rest 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Midsill
20
Q
MATCHING Steel pipes filled with concrete 1. Aggregate 2. Cast-in-place concrete 3. Chairs 4. Composite construction 5. Falsework 6. Footing 7. Lally column 8. Midsill 9. Reshoring 10. Skewback
A
- Lally column
21
Q
MULTIPLE CHOICE Which of the following is a characteristic of concrete? A. Strong in compression B. Weak in shear C. No tensile strength D. All of the above
A
A. Strong in compression
22
Q
MULTIPLE CHOICE Steel is significantly more \_\_\_\_\_\_\_ than concrete. A. costly B. prevalent C. strong (compressive strength) D. all of the above
A
C. strong (compressive strength)
23
Q
MULTIPLE CHOICE High-tensile strength wire loses its pre-stress at what temperature? A. 800 degress F B. 850 degrees F C. 900 degrees F D. 1000 degrees F
A
A. 800 degress F
24
Q
MULTIPLE CHOICE Brick veneer buildings are generally kept to a maximum of \_\_\_\_\_\_\_\_\_\_ stories, A. 3 B. 4 C. 5 D. 6
A
D. 6
25
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MULTIPLE CHOICE
Formwork can represent what percent of the cost of a concrete structure?
A. 0.06%
B. 0.6%
C. 6%
D. 60%
```
D. 60%
26
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MULTIPLE CHOICE
The most dangerous fire potential in a concrete construction site is:
A. arson
B heating
C. temporary electricl lines
D. formwork
```
B heating
27
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MULTIPLE CHOICE
Telescoping tublar steel braces are called:
A. tormentors
B. rakers
C. brakers
D. tendons
```
A. tormentors
28
```
MULTIPLE CHOICE
Compared to conventional reinforced concrete, post-tensioned concrete presents __________ catastrophic collapse hazard during a fire.
A. less
B. a greater
C. an equal
D. none of the above
```
B. a greater
29
```
MULTIPLE CHOICE
Which of the following provides diagonal bracing in precast buildings?
A. Colmns
B. Wooden falsework
C. Cold-drawn steel cables
D. All of the above
```
C. Cold-drawn steel cables
30
```
MULTIPLE CHOICE
Which of the following provides protection for each piece of steel?
A. Membrane fireproofing
B. Fire rating
C. Individual fireproofing
D. None of the above
```
C. Individual fireproofing
31
FILL-IN-THE-BLANK
| Cement formation is a ______ reaction.
chemical
32
FILL-IN-THE-BLANK
| In a fire, it is vital that any exposed steel connected to stressed tendons be ________ immediately.
cooled
33
FILL-IN-THE-BLANK
The valvue of listing building materials is contingent upon the _________ assembly being accomplished exactly as performed in the laboratory.
field
34
FILL-IN-THE-BLANK
| The disadvantage of concrete is its______.
weight
35
FILL-IN-THE-BLANK
Thin rods installed near the surface of concrete to help concrete resist cracking due to temperature changes are called _____rods.
temperature
36
FILL-IN-THE-BLANK
In a concrete masonry structure, steel reinforcement is embedded in such a manner that the two materials act together in _____ forces.
resisting
37
FILL-IN-THE-BLANK
| A system that incorporates beams running in only one direction is called a/an ______ structural system.
one-way
38
FILL-IN-THE-BLANK
Concrete floors in cast-in-place, concrete-framed buildings are cast integrally with _____, providing a monolithic rigid-framed building.
columns
39
FILL-IN-THE-BLANK
| In _______ concrete, closely spaced beams are set at right angles to one another and unnecessary concrete is formed out.
waffle
40
FILL-IN-THE-BLANK
The length of time required to cure concrete depends on the type of cement used and the _________ during the curing period.
temperature
41
TRUE/FALSE
| Cutting into a post-tensioned floor is unsafe during a fire.
True
42
TRUE/FALSE
| Concrete has good shear resistance.
False
43
TRUE/FALSE
| Brick veneer must have contraction provisions for high early-strength concrete.
True
44
TRUE/FALSE
| Vertical reinforcing bars in concrete beams designed to prevent craacking under shear stresses are called stirrups.
True
45
TRUE/FALSE
| The loads on concrete buildings under construction cannot exceed the design load.
False
46
Progressive collapse is not a concern after concrete is hard to the touch.
False
47
TRUE/FALSE
| A plenum ceiling requires ceiling panels to be in place for proper operation.
True
48
TRUE/FALSE
| A monolithic concerte building is resistant to collapse.
True
49
TRUE/FALSE
| If a building is concrete, the contents have very little effect on the building.
False
50
TRUE/FALSEMitation concrete panels can be used on the exterior of a building.
True
51
SHORT ANSWER
| In what three areas do fire departments face problems regarding concrete construction?
All of the following:
. Collapse during construction with no fire
. Fire during construction
. Fire in completed, occupied buildings
52
SHORT ANSWER
| What is the process of lift slab construction?
Columns are erected to their full height and then each floor is poured and lifted into place. A bond breaker is used between floors.
53
SHORT ANSWER
| What is the purpose of steel reinforcing rods in columns?
They provide necessary tensile strength and carry some of the compressive load.
54
SHORT ANSWER
| What indicators show clear signs of possible trouble in a concrete building during a prefire plan?
Any of the following:
. Deteriorated concrete
. Spalling that exposes reinforcing rods
. Cracks in concrete
55
SHORT ANSWER
| What is the concern with impact loads on concrete?
Floors that are damaged on one side may give no indication as to the damage on the other side of the concrete.
56
WORD FUN
| Flow valve that controls a sudden increased flow and shuts off a flammable gas if a broken line occurs
Excess
57
WORD FUN
| Mold that shapes concrete
Formwork
58
WORD FUN
| Often used to deliver materials to buildings under constructiom
Crane
59
WORD FUN
| Another name for a cable or tendon
Strands
60
WORD FUN
| Columns that use steel and concrete to form one unit
Composite
61
WORD FUN
| Placing fluid concrete into molds
Casting
62
WORD FUN
| Loss of surface material when concrete is subjected to heat
Spalling
63
WORD FUN
| A dangerous form of concrete pouring that involves moving forms upward as the concrete is poured
Slipforming
64
WORD FUN
| Type of construction in which one pour of concrete is completed in order to bond all of the concrete together
Monolithic
65
WORD FUN
| Insulatin steel
Fireproofing
66
READ EACH SCENARIO, THEN ANSWER EACH QUESTION IN DETAIL
A local contractor is building a cast-in-place concrete structure that is five stories tall. What tatical hazards should be considered as this building is being built?
During the construction process there are usually many workers. One of the first things to consider is how many people may be on site if something happens and whether there is accountability for them. Concrete can be very heavy, and a large number of strengthening rods may be encountered. Determine the tools that may be available to cut these reinforcing bars. Determine the types of forms that will be used and whether there will be any large pours. Sufficent personnel and tools must be brought to handle any collapse of the structure; fires that occur before the structure is fully cured may be very dangerous.
67
READ EACH SCENARIO, THEN ANSWER EACH QUESTION IN DETAIL
A building with floor-ceiling assembly is on fire. What factors might cause problems for fire fighters by compromising the fire performance of the assembly?
Any of the following:
. Poor application of fireproofing
. Holes that were not properly firestopped
. Improperly supported ceilings
. Equipment not properly supported from concrete
. Spalling of concrete
