Test 4 Flashcards
When using smooth aggregate, which is the right compressive strength to saw cut?
A) 550 psi
B) 650 psi
C) 750 psi
D) 950 psi
C) 750 psi
Since January 1998 you cannot use what type of harness?
A) Body belt harness
B) shoulder strap harness
C) rope harness
D) none of the above
A) Body belt harness
What is the difference of concrete wall cutting blades?
A) blade cores are thicker
B) blade is thinner
C) diamond sizes
D) none of the above
A) blade cores are thicker
What is the difference of concrete flat cutting blades?
A) dry-cutting blades
B) wet-cutting blades
C) diamond, abrasive, or silicon carbide blades
D) all of the above
D) all of the above
What is the minimum thickness of basement bearing walls?
A) 4”
B) 5 1/2”
C) 6”
D) 7 1/2”
D) 7 1/2”
When you identify down deflection in concrete form work, what is it called?
A) camber
B) dust particles
C) mortar particles
D) none of the above
A) camber
A foundation wall supporting untreated wood shall be a minimum of __ inches above grade.
A) 12
B) 6
C) 4
D) 8
B) 6
Seismic zones 0-3 using anchor bolts shall be spaced not more than 6 feet apart, 1/2 inch in diameter, and embedded at least __ inches into the concrete
A) 10
B) 8
C) 5
D) 7
D) 7
According to the building code, the minimum thickness of concrete floor slabs supported directly on the ground shall not be less than__ inches
A) 3
B) 4
C) 4 1/2
D) 3 1/2
D) 3 1/2
According to the building code, when placing concrete, the aggregate size shall not exceed __ the clear space between reinforcing bars
A) 1/4
B) 2/3
C) 1/2
D) 3/4
D) 3/4
According to the building code, the maximum size of aggregate in concrete placed in forms shall be __ the dimension of the form opening
A) 1/3
B) 1/2
C) 1/4
D) 1/5
D) 1/5
According to the building code, concrete slabs placed on grade should not have an aggregate size exceeding __ the thickness of the slab.
A) 1/4
B) 1/2
C) 1/5
D) 1/3
D) 1/3
All reinforcing bars should have a minimum cover of __ inch, 1 1/2 inches when exposed to weather and 2 inches when exposed to soil
A) 1/8
B) 3/8
C) 1
D) 3/4
D) 3/4
According to the building code, how many compressive test cylinders required for 750 cubic yards of poured concrete?
750/150=5
A) 15
B) 50
C) 5
D) 1
C) 5
A structural horizontal bearing on masonry or concrete walls, shall have a minimum support of __
A) 6 in
B) 3 in
C) 4 in
D) 5 in
C) 4 in
The depositing of retempered concrete is permitted if __
A) authorized by the building official
B) required for prevention of a cold joint
C) completed within 15 mins of preperation
D) the ambient temperature is less than 90*F
A) authorized by the building official
Whats the biggest pipe that can be put into 6 inches of concrete?
A) 1 in
B) 4 in
C) 3 in
D) 2 in
D) 2 in
According to the building code, the minimum thickness of concrete basement floor slabs shall not be less than __ inches.
A) 4
B) 4 1/2
C) 3
D) 3 1/2
D) 3 1/2
The recommended minimum cover ( or protection) for #5 reinforcing in concrete walls, which are not exposed directly to the ground or to the weather is __ to face of concrete.
A) 1/4 from center of bar
B) 2” form center of bar
C) 3/4” from outside of bar
D) 1/ 1/2 from center of bar
C) 3/4” from outside of bar
Without forcing it allow a new blade to sharpen itself how?
A) by holding a blade sharpener to the blade
B) filing the saw teeth
C) on the material to be cut
D) all of the above
C) on the material to be cut
How many gallons of water is needed to cool the blade per minute
A) 1 to 2 gallons
B) 2 to 5 gallons
C) 5 to 7 gallons
D) 7 to 10 gallons
B) 2 to 5 gallons
If the blade is forced, it will become polished, stop cutting, and may become distorted, don’t let the blades in in the cut either. This practice is called what?
A) spinning
B) babying
C) sand bagging the blade
D) babying or sandbagging the blade
D) babying or sandbagging the blade
Use wedges to keep deep saw cuts open wider than the kerf of the blade, without wedges the concrete will do what?
A) pinch the blade inside
B) stop the blade from sawing
C) distort the blade
D) none of the above
A) pinch the blade inside
You can always cool a dry-cutting diamond blade that is overheating by what?
A) turning the saw off
B) submerging the blade in oil
C) pulling the blade out of the cut
D) all of the above
C) pulling the blade out of the cut
