Block C Concrete

Question 1

What type of foundation is best to provide additional support on soft soil?

Answer 1

Mud Slabs

Question 2

How are tilt-up panels lifted?

Answer 2

Tilt up panels are lifted up with coil inserts

Question 3

What effect does a plastizer have when added to concrete?

Answer 3

Plastizers are water reducing the increases workability. They reduce water requirements.

Question 4

Why is Calcium Chloride added to concrete?

Answer 4

Calcium Chloride is added to concrete after mixing as an accelerator

Question 5

When an Air entrainment detergent is added to concrete, the concrete will become?

Answer 5

durability

Question 6

When is pencil rod and rod clamps used

Answer 6

Used for wide forms, varying in sizes

Question 7

Why are reglets cast in concrete walls?

Answer 7

Allow for flashing attachment

Question 8

Order of sequence for slab placement.

Answer 8

place, consolidate, screed, float, trowel, seal and cut control joints.

Question 9

To join steel soldier piles when bracing the side the of an excavation, what is used?

Answer 9

wood lagging

Question 10

Lean concrete is commonly used when?

Answer 10

Lean concrete refers to a mixture designed as a topping on an existing slab

Question 11

Epoxy grout is commonly used in this type of environment

Answer 11

Epoxy grout is commonly recommended for corrosive environments

Question 12

Freefall on concrete should not exceed?

Answer 12

4’

Hint: OBC 9.14.3.3.(4)

Question 13

What is required coverage of clean granular material needed around the top and side of weeping tile placement?

Answer 13

150mm

Question 14

How to laterally Support an ICF

Answer 14

Strapping and diagonal bracing

Question 15

How to fix an active leak in a foundation wall

Answer 15

Hydraulic cement

Question 16

Constructing formwork to make stripping easier. Forms should be built.

Answer 16

Using nails

Question 17

What is the funnel shaped widening at the top of a round column?

Answer 17

Capital

Question 18

What is the process of extending existing foundations to lower levels of undisturbed soil?

Answer 18

Under-pinning

Question 19

Where on the wall form is the greatest pressure exerted?

Answer 19

At the bottom

Question 20

What is done to keep concrete from sticking to the forms?

Answer 20

Apply oil to the forms

Question 21

What is the correct consistency for dry pack grout?

Answer 21

Squeeze it in your hand and it holds its shape

Question 22

What are the minimum dimensions of planks required for scaffold decks?

Answer 22

2”x10”x8’

Question 23

What is the slump test performed for?

Answer 23

To test the consistency of concrete

Question 24

What purpose does a poly vapour barrier serve under a slab on grade?

Answer 24

To stop slab from absorbing dampness from soil

Question 25

How much standing water can be permited in an excavation?

Answer 25

Answer: None

9.12.1.2.(1)

Question 26

How big of stone can be placed in backfil that is within 300mm of a foundation wall?

Answer 26

Answer: 250mm diameter

9.12.3.3.(1)

Question 27

When would a sump pit be required?

Answer 27

Answer: when gravity drainage is not practical

9.14.5.2.(1)

Question 28

What is the standard for unreinforcved concrete that is being used in a redsidental application?

Answer 28

Answer: CSA.A23.1

9.3.1.1(1)

Question 29

What is the minimum thickness for a residential footing?

Answer 29

Answer: min. 100mm or the width of footing projection

9.15.3.8.(1)(a)

Question 30

What is the min. size of drainage pipe or tile for foundation drainage?

Answer 30

Answer: 100mm

9.14.3.2.(1)

Question 31

Where are window wells to be drained to?

Answer 31

Answer: footing level

9.14.6.3.(1)

Question 32

What is the maximum vertical rise of a step footing on sand?

Answer 32

9.15.3.9.(1)(b)

Answer: 600mm

Question 33

What is the min. horizontal distance between the risers in a step footing?

Answer 33

(b) Answer: 600mm

9. 15.3.9.(1)

Question 34

Is it permissible to have contact between a floor slab and a footing?

Answer 34

Answer: No

9.16.4.4(1)

Question 35

What is the minimum wall thickness of a 15MPa laterally supported concrete foundation wall, which is 2m above basement floor or crawlspace?

Answer 35

Answer: 200mm

9.15.4.2.(a)

Question 36

Does the footing size increase for masonary construction?

Answer 36

Answer: yes

9.15.3.5.(1)(a)(b)(c)