Refresher test #2

Question 1

How many workers must be at a Josie before a first aid kit is required?

Answer 1

One or more

Question 2

When removing trench shooting, the uprights are pulled out

Answer 2

After backfilling has been completed

Question 3

OSHA requires employers to provide ladders, steps, ramps, or other safe means of egress for workers working in trench excavations _________or deeper

Answer 3

4 feet (1.22 meters)

Question 4

The width of a bench directly above any particular rise shall not be less than ______ times the height of that rise

Answer 4

1.5 times
Ex: rise is 4’, the width of the next landing should be at least 6’

Question 5

Scaffolds are required when demolition work is more than _____ above the floor or grade

Answer 5

3M
10’

Question 6

Trench shoring consisting of uprights, stringers, and struts is known as

Answer 6

Skeleton shoring

Question 7

The structure of the occupational safety and health committee is outlined in the

Answer 7

Industrial Health and Safety Regulations

Question 8

What is the correct slope ratio for trenches

Answer 8

3:4

Question 9

Prior to getting permission to start building in a New Subdivision, the owner of the subdivision must apply for and receive a

Answer 9

Development permit

Question 10

Contractors who want to demolish a building must have a demolition permit to

Answer 10

Prevent a heritage building from being demolished

Question 11

Who is permitted to apply for a gas permit
A: landlord
B: general contractor
c: tenant
D: plumbing or gas contractor

Answer 11

D: plumbing or gas contractor

Question 12

A concrete-form inspection is required when?
And why?

Answer 12

Before the concrete is placed
To check the bearing conditions of the ground
To see if the form work is too close to the property line

Question 13

Framing inspections are required before or after all electrical and plumbing is roughed in

Answer 13

After

Question 14

When gas service lines are inspected, they are subjected to a

Answer 14

Pressure test

Question 15

Who makes the final inspection of a building

Answer 15

Building inspector

Question 16

Hire many sets of plans (blueprints) are required to get a building permit for commercial construction?

Answer 16

Six

Question 17

What is the earliest stage of construction the surveyors will conduct a survey, for purposes of Surveyors certificate showing the location of the building on the lot

Answer 17

After wall forms are erected

Question 18

On new construction, the first inspection by the builder is required prior to

Answer 18

Placing concrete in concrete forms

Question 19

Prior to applying insulation and Vapor barrier, you will require approval from who

Answer 19

The electrical inspector

Question 20

The purpose of a water-and a sewer-connection permit is to allow city hall to register the

Answer 20

Date to start charging for those services

Question 21

A solid fuel burning appliance (wood stove) will require an inspection by the

Answer 21

Building inspector

Question 22

If you wish to start construction before architectural drawings are completed, you can do so if you acquire

Answer 22

Development permit

Question 23

Prior to allowing people to move into a new house, the contractor out home owners must apply for and be awarded

Answer 23

An occupancy permit

Question 24

Lag bolts have a threaded portion that is similar to

Answer 24

Similar to a wood screw

Question 25

When using polysulphide-base caulking, operators are required to wear

Answer 25

Gas tight goggles and gloves in well ventilated areas Is a hardcore caulking Used for concrete Can cause kidney failure

Question 26

Major categories of caulk?

Answer 26

Silicone: bathrooms, hydrophobic, does not like water, not good on the exterior, can’t paint over it Butyl-rubber caulk is a specialty caulk for outdoor use only. It is the best exterior caulk for roofing construction and repairs, since it can withstand extreme temperatures and creates a strong, insulating and water-tight seal. Exterior would be polyurethane because it good with uv, is water resistant, still not good with paint, try to colour match For expansion joints, polysulphide, a5 gallon pail

Question 27

What are the three categories of sealant

Answer 27

can be categorised broadly as resin-based sealants, glass ionomer sealants and hybrid sealants

Question 28

What do you do for an expansion joint

Answer 28

Put backer Rod and polysulphide

Question 29

What is concrete composed of

Answer 29

Cement, water and aggregates Cement is the magical ingredient in concrete

Question 30

The maximum size of the aggregates should be _____ of the width of the unreinforced wall member

Answer 30

One fifth Need to vary aggregate sizes Water cement ratio

Question 31

If there is too much water in a concrete mixture, the concrete will be weak, you can compensate by adding ______

Answer 31

A plasticizer

Question 32

A lot water-cement ratio in concrete will make

Answer 32

Strong concrete

Question 33

How would you check the consistancy of a concrete mixture before you pour

Answer 33

Do a slump test

Question 34

What is a slump test

Answer 34

Fill a cone (8” bottom, 4” top, one foot high) with concrete then pull it off The distance from the top of the cone to the top of the resulting pile is the slump

Question 35

When microscopic air bubbles are placed in concrete, the process is called

Answer 35

Air entrainment

Question 36

An air entraining agent should not be specified or used for concrete to be given a smooth, dense, hard-troweled finish because _____________

Answer 36

blistering or delamination may occur

Question 37

When pouring concrete in the winter an ___________ may need to be added

Answer 37

An excellerator Makes things happen faster

Question 38

Concrete defect Too much water causes

Answer 38

Dusting

Question 39

Concrete defect Under or over consolidation (vibrating) causes

Answer 39

Honeycombing Tiny holes everywhere

Question 40

Concrete should be poured at a rate of _______

Answer 40

3-4 feet per hour

Question 41

The mass of one cubic meter is approximately

Answer 41

2400 kg 2.4 kg/m3

Question 42

Drill a hole off about 75mm diameter in a concrete wall, the best combination to use would be a

Answer 42

Rotary hammer with a core bit

Question 43

Safety harness Need to be rated at

Answer 43

5000lbs

Question 44

Safety harness Rope has to be rated

Answer 44

6000lbs More than a harness which is 5000lbs because you lose strength when you tie it

Question 45

Safety restraint is rated at

Answer 45

800lbs

Question 46

The fixed reticle on an optical level is also known as the

Answer 46

Crosshairs

Question 47

When levelling an optical levelling instrument, the bubble moves in the direction of the

Answer 47

Left thumb when turning the levelling screw

Question 48

At what height does scaffolding require a guardrail

Answer 48

3000mm 10’

Question 49

How to set up a tripod on a hill

Answer 49

One leg at the top, two legs down

Question 50

How to check a builders roof for plumb

Answer 50

Make circles or move it back and forth The lowest measurement is plumb

Question 51

Minimum width of a wooden scaffold plank

Answer 51

10” Should be 20” or two 2x10 doubled up

Question 52

How often do you tie off a scaffold

Answer 52

1st row is 3x the base After that tie off every 20’ 20’ up vertical 21’ horizontal

Question 53

What is the maximum height of a free standing scaffold

Answer 53

Three times it’s minimum base dimension

Question 54

Rung spacing for a Jobsite ladder

Answer 54

12” o/c

Question 55

Job-built ladders must have a minimum distance between the side rails no less than

Answer 55

15 inches

Question 56

The members that incorporate stability into tube and clamp scaffold are

Answer 56

Face, sway, internal braces

Question 57

The safety factor for ropes used to support a worker is

Answer 57

10

Question 58

A right lay fibre route should be cooled

Answer 58

Clockwise

Question 59

To fasten two large diameter ropes together, use what kind of knot

Answer 59

Carrick bend

Question 60

The double basket hitch should be set so that the angle to the Hirixontsl is never less than

Answer 60

60 degrees Equilateral triangle

Question 61

Crane hand signal Thumbs up or down

Answer 61

Raise/lower the boom

Question 62

When building batter boards, why are horizontals nailed onto the outside of the verticals, away from the excavation

Answer 62

The pull of the line holds the members together

Question 63

If the soil at the site is very soft and crumbling, what effect does this have on the placement of the batter boards

Answer 63

They are moved further from the excavation

Question 64

If the string lines are to be in place for extended periods, they should be checked

Answer 64

At least once a day

Question 65

The main purpose of batter boards is to help

Answer 65

Position the building on the lot

Question 66

If height is a problem when setting batter boards, the lowest you can set them is to clear the

Answer 66

Footings

Question 67

What are the three main objectives in concrete formwork construction

Answer 67

Quality, strength and safety

Question 68

What is the name for the system of structural supports and bracing required for the support of temporary loads during construction

Answer 68

Falsework

Question 69

If any changes to a tilt up panel occur, what must be done

Answer 69

Changes are authorized by a registered engineer

Question 70

Lumber for concrete formwork should be A: very dry B: Very wet C: partially seasoned D: green or fresh-cut

Answer 70

C: partially seasoned

Question 71

What are disconnecting ties used for

Answer 71

Very thick or heavy castings Two common types of internally disconnecting form ties are the coil tie and the she-bolt tie. Both have reusable end bolts that unscrew from the inner tie rod member, which stays in the concrete.

Question 72

For light or low forming, wood braces are attached to

Answer 72

Stakes Although turnbuckles are better

Question 73

What is cast into a concrete wall to secure counter flashing

Answer 73

Reglets

Question 74

What is done to tall forms to guard against their failure

Answer 74

Place tires and wallets close together near the bottom

Question 75

Concrete forming What aspect of a form wall has the most impact on the pressure

Answer 75

The height of the wall

Question 76

Which of the following may be used to create a textured face on a concrete wall A: Rustication strips B: Edge forms C: Screeds D: Overlaid plywood

Answer 76

A: rustication strips 3 reasons A: decoration B: to hide a pour height seam C: control joint

Question 77

What is the purpose of a keyway

Answer 77

It prevents lateral or vertical movement between sections

Question 78

In the welded wire mesh description “254x254 x P13/p13” what does P13 mean

Answer 78

Area of the cross section of the wire Mesh for slab on grade

Question 79

Which kind of reglet needs no caulking

Answer 79

Cast-in- place

Question 80

When all the components of a cast in place structure are placed at the same time, the placement is described as

Answer 80

Monolithic

Question 81

Bulkheads, blockouts, and door and windows bucks are all installed in wall forms

Answer 81

Before all the ties are in place

Question 82

The correct time to align the tips of any wall forming system is

Answer 82

Once one side is complete

Question 83

What is a spandrel beam

Answer 83

The beam at the outer edge of the slab

Question 84

How is the precise column-form height usually obtained

Answer 84

Built slightly short then shimmed up

Question 85

Which slab uses drop panels and capitals

Answer 85

Flat-slab

Question 86

What is the difference between flat slab and flat plate

Answer 86

Simple Flat plate doesn’t have protrusions at the bottom Long answer The flat plate is a two-way reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. The flat slab is a two-way reinforced structural system that includes either drop panels or column capitals at columns to resist heavier loads and thus permit longer spans

Question 87

What is a waffle slab

Answer 87

A waffle slab, also known as a two-way joist slab or ribbed slab, consists of a grid of deep beams or joists intersecting at regular intervals, creating a waffle-like pattern. The beams or joists are supported by columns, and the spaces between them are filled with a relatively thin concrete slab. This design creates a system of ribs that enhance the slab's stiffness and load-carrying capacity.

Question 88

What distinguishes a rubber slab from a waffle slab

Answer 88

Waffle slabs are stronger

Question 89

Vertical shores must be secured at their top and bottom to

Answer 89

Prevent their accidental displacement

Question 90

Where would you find specifications for centre to centre locations of machine based anchor bolts

Answer 90

On approved shop drawings

Question 91

When anchor bolt ties are used to prevent the bolts from withdrawing, where should the ties be placed

Answer 91

Just above the bend in the bolts

Question 92

Stairs often have metal plates embedded at regular intervals to

Answer 92

Secure metal railings

Question 93

Which of the following is a very important aspect of placing formwork for dock levellers

Answer 93

Ensure that forms do not float

Question 94

To ensure a good connection between concrete and deformed dowels, the fields should be embedded into each concrete section a distance of at least

Answer 94

30 bar diameters

Question 95

Name the part of a concrete stair forms that supports the underside of the stair while the concrete is placed

Answer 95

Soffit

Question 96

To ease form stripping for precast concrete stairs you would

Answer 96

Oil and/or taper the forms before placing the concrete

Question 97

What is the definition of run

Answer 97

The total horizontal distance covered by the stair or the distance from riser to riser

Question 98

Total rise is 4455mm, unit rise is 165mm. What is the highest riser at which the landing can be placed

Answer 98

22

Question 99

The vibrator should be inserted into the concrete vertically at intervals equal to the radius of action multiplied by

Answer 99

1.5

Question 100

In hot weather, extra water is sometimes added to concrete mix. The effect on the finished product is

Answer 100

Lower ultimate strength

Question 101

Deflecting concrete against rebar or baffles during placement can cause

Answer 101

Segregation

Question 102

High early strength concrete can be obtained using

Answer 102

Type 30 cement

Question 103

The greatest strength gain in normal concrete is within the first three days

Question 104

What kind of forms are most commonly used in tilt up construction

Answer 104

Wood

Question 105

What is between stairwells and fly forms

Answer 105

Filler panels

Question 106

Why are bracing and anchoring so important when installing ganged or giant forms

Answer 106

The panels are often exposed to wind loading

Question 107

Slip forms are usually battered up to

Answer 107

4mm in 1200mm

Question 108

To avoid fins of concrete at joints in wood mould, what is usually done

Answer 108

Openings are taped or filled

Question 109

When should forms be cleaned and oiled

Answer 109

Just after they are stripped

Question 110

When a monolithic suspended slab with columns and beams is ready for firm removal, which component is stripped after the beam bottoms

Answer 110

Column forms

Question 111

Why is it a good idea to leave a few wall ties in place until forms are loosened from the concrete

Answer 111

Keeps the forms from breaking loose accidentally

Question 112

What procedure should you follow to dismantle concrete formwork

Answer 112

Remove shores in accordance with engineers design plans

Question 113

Reshores under flat slabs should be placed so that they are

Answer 113

Directly below loading points imposed on the slab

Question 114

Wood resists the flow of heat energy _____ times better than brick and _____ than concrete off equal thickness

Answer 114

6 times better than brick 14 times better than concrete