Masonry

Question 1

formula for estimating masonry block

Answer 1

linear feet x height x 1.125 =Total # of blocks

Question 2

formula estimating masonry cement…

Answer 2

(number of blocks ÷ 100) x 3 = bags of cement

Question 3

formula estimating for masonry sand

Answer 3

1 ton of sand per 8 bags of masonry cement
-or-
bags of cement ÷ 8 = tons of sand

Question 4

formula estimating for water

Answer 4

8 gallons of water per bag of cement
-or-
bags of cement x8 =gallons of water

Question 5

how many CMU blocks come on a pallet?

Answer 5

94

Question 6

formula for concrete Project Volume

Answer 6

PV= L ×W ×H × #of pads

Question 7

formula calculating concrete Loss Factor

Answer 7

LF = PV x 1.1 (if under 5400 cubic ft/200cu yd)

LF = PV x1.05 (if over 5400cu ft/200cu yd

Question 8

formula calculating concrete Loss Volume?

Answer 8

LV= LF x1.5

Question 9

what are the most common types of mortar mixes?

Answer 9

N M S O

Question 10

formula calculating cement, sand, and gravel for concrete

Answer 10

1/6 x LV =bags of cement
2/6 x LV = cubic feet of sand
3/6 x LV = cubic feet of gravel

Question 11

How much concrete can delivery trucks hold?

Answer 11

10 cubic yards

Question 12

formula converting cubic feet into cubic yards

Answer 12

(length x width x height) ÷ 27 = cubic yards

Question 13

how much time do you have to pour concrete, once water is mixed in?

Answer 13

3 hours

Question 14

What are the benefits of a lower psi mortar?

Answer 14

better adhesive and sealing powers

Question 15

What is the most common cement used by the military?

Answer 15

Portland Cement

Question 16

what type of mortar is general purpose?

Answer 16

Type N

Question 17

What is Type N mortar used for?

Answer 17

above grade work, interior and exterior load bearing

Question 18

What type of mortar has the highest compressive strength and is used for below grade load bearing?

Answer 18

Type M

Question 19

What is Type S mortar used for?

Answer 19

below grade, sewers, brick patio/driveway

Question 20

What type of mortar is used for above grade, non-load bearing situations?

Answer 20

Type O

Question 21

What type of mortar is used for historic preservation?

Answer 21

Type K

Question 22

Formula for Volume of a cylinder

Answer 22

V= pi x Radius squared x height

Question 23

When hand mixing what order should you mix?

Answer 23

dry goods mixed, then add water

Question 24

What components go into concrete?

Answer 24

Portland cement, water, aggregates

Question 25

what affect does water have in mixing concrete?

Answer 25

less water makes a stronger mix

Question 26

Concrete should be mixed with 60-80% of what?

Answer 26

Aggregates

Question 27

What is used primarily to gain economy, in concrete mixtures?

Answer 27

Aggregates

Question 28

what are the types of Aggregates in a concrete mix?

Answer 28

Course- gravel, rock | Fine- sand

Question 29

What are the types of Portland Cement?

Answer 29

``` Type 1 Normal, Type 2 modified, Type 3 high early, Type 4 low heat Type 5 sulfate resistant ```

Question 30

what types of Portland Cement are "air entrained"?

Answer 30

Types 1,2,3

Question 31

What are the types of concrete?

Answer 31

Reinforced, pre-stressed, Precast, lightweight

Question 32

Which type of concrete is easier to ship and fire resistant?

Answer 32

lightweight

Question 33

Describe pre-stressed concrete

Answer 33

reinforced rebar or welded wires are stretched with tension before concrete is poured over it

Question 34

what type of concrete has steel rods running through it?

Answer 34

Reinforced

Question 35

What are the disadvantages of concrete?

Answer 35

Weak tinsel strength, expansion and contraction, shrinks while drying, weight

Question 36

what advantages does concrete have over other materials?

Answer 36

durability, castable, economical, compressive strength

Question 37

What type of joint controls cracking?

Answer 37

control joint

Question 38

where would an expansion joint be located? What would it consist of?

Answer 38

between two slabs of concrete, such as sidewalk and building, or driveway and sidewalk. a resilient material, rubber, wood etc no more than 1/4in thick

Question 39

what must concrete forms be?

Answer 39

tight rigid strong

Question 40

what must be <4ft per hour, vertically?

Answer 40

rate of filling concrete

Question 41

When should you never pour concrete?

Answer 41

freezing Temps

Question 42

when should you use accelerators?

Answer 42

When pouring in Temps over 90 degrees

Question 43

when should you not use accelerators? why?

Answer 43

in reinforced concrete. they are oxidize and will weaken the metal

Question 44

What is it called when you add more water to concrete mix?

Answer 44

retempering

Question 45

what is Modular Construction?

Answer 45

when the dimensions of the construction are made around the size of block being used

Question 46

Name the parts of a wall

Answer 46

corner/end, field, expansion/control Joint, intersection

Question 47

what do you put in a block wall, every 4ft?

Answer 47

rebar reinforcement

Question 48

What are the 3 essential things the foundation must be?

Answer 48

plumb, level, square

Question 49

what does plumb mean?

Answer 49

perpendicular, straight up and down, on 2 axis'

Question 50

what does it mean to be even on a horizontal plane?

Answer 50

level

Question 51

what does square mean?

Answer 51

equal distances and angles

Question 52

what are some considerations of a job site?

Answer 52

drainage, slope, soil stability, tactical employment, commanders desire

Question 53

what size should footing be?

Answer 53

2x wall thickness